Measures Developed by the DePaul Research Team
Measures
DePaul
Symptom Questionnaires are below:
These are
our questionnaires for measuring symptoms of ME/CFS, ME, and COVID-19.
Psychometric properties of our surveys are cited below. All instruments are
free to use. If you are considering translating any of our surveys, please let
us know as we would be happy to provide you with helpful suggestions.
DePaul Symptom Questionnaire-1 (DSQ-1):
References:
Jason
& Sunnquist (2018). The Development of the DePaul
Symptom Questionnaire
Scoring:
Case Definition SPSS Scoring Syntax
Case Definition R Scoring Syntax
Translations:
DePaul Symptom Questionnaire-2 (DSQ-2):
Reference:
Bedree, Sunnquist, & Jason
(2019). The DePaul Symptom Questionnaire-2: A Validation Study
Scoring:
Case Definition SPSS Scoring Syntax
Translation:
DePaul Symptom Questionnaire – Short Form (DSQ-SF):
Reference:
Scoring:
Case Definition SPSS Scoring Syntax
Translations:
Pediatric Questionnaires
DePaul Symptom Questionnaire – Pediatric Screening
Questionnaire (DSQ-PSQ):
Pediatric Screening Questionnaire (DSQ-PSQ) - PDF
DePaul Symptom Questionnaire – Pediatric (DSQ-PED):
Reference:
Scoring:
Translations:
Post-Exertional Malaise:
DePaul Symptom Questionnaire – Post-Exertional Malaise
(DSQ-PEM):
DSQ-PEM English Version – PDF & Scoring Guide
Reference:
Cotler
et al. (2018). A Brief Questionnaire to Assess Post-Exertional Malaise
DePaul Post-Exertional Malaise Questionnaire (DPEMQ):
Reference:
Translations:
DePaul
Symptom Questionnaire - COVID (DSQ-COVID):
Translations:
Other Instruments:
The Chronic Fatigue Syndrome Attitudes Test Questions
DSQ 1
Conroy, K.,
Bhatia, S., Islam, M., & Jason, L.A. (2021). Homebound versus bedridden
status among patients with Myalgic
Encephalomyelitis/Chronic Fatigue Syndrome. Healthcare, 9(2),
106. PMCID:
PMC7909520 https://doi.org/10.3390/healthcare9020106
Kemp, J., Sunnquist, M., Jason, L.A., & Newton, J.L.
(2019). Autonomic dysfunction in myalgic
encephalomyelitis and chronic fatigue syndrome: Comparing self-report and
objective measures. Clinical Autonomic Research, 29(4),
475-477. PMCID:
PMC6697554 https://doi.org/10.1007/s10286-019-00615-x
Huber, K., Sunnquist, M., & Jason, L.A. (2018). Latent class
analysis of a heterogeneous international sample of patients with myalgic encephalomyelitis/chronic fatigue syndrome. Fatigue:
Biomedicine, Health & Behavior, (6)3, 163-178. PMCID:
PMC6703845 https://doi.org/10.1080/21641846.2018.1494530
Strand,
E.B., Lillestøl, K., Jason, L.A., Tveito, K., Diep, L. M. Valla, S.S., Sunnquist, M., Helland, I.B., Herder, I., & Dammen, T.
(2016): Comparing the DePaul Symptom Questionnaire with physician assessments:
A preliminary study, Fatigue: Biomedicine, Health & Behavior, 4(1),
52-62. https://doi.org/10.1080/21641846.2015.1126026
Murdock KW,
Wang XS, Shi Q, Cleeland CS, Fagundes CP, Vernon SD.(2016)
The utility of patient-reported outcome measures among patients with myalgic encephalomyelitis/chronic fatigue syndrome. Qual
Life Res, 26, 913–21. doi:
10.1007/s11136-016-1406-3
Jason, L.A.,
Kot, B., Sunnquist, M., Brown, A., Evans, M., Jantke, R., Williams, Y., Furst, J., & Vernon, S.D.
(2015). Chronic fatigue Syndrome and myalgic
encephalomyelitis: Toward an empirical case definition. Health
Psychology and Behavioral Medicine: An Open Access Journal, 3, 82-93. PMCID: PMC4443921 https://doi.org/10.1080/21642850.2015.1014489
Jason, L.A.,
Kot, B., Sunnquist, M., Brown, A., Reed, J., Furst,
J., Newton, J. L., Strand, E.B., & Vernon, S. D. (2015). Comparing and
contrasting consensus versus empirical domains. Fatigue: Biomedicine,
Health & Behavior, 3, 63-74. PMCID: PMC4788637 http://doi.org/10.1080/21641846.2015.1017344
Jason, L.A.,
Sunnquist, M., Brown, A., Newton, J. L., Strand, E.
B., & Vernon, S. D. (2015). Chronic fatigue syndrome versus Systemic
Exertion Intolerance Disease.Fatigue:
Biomedicine, Health & Behavior, 3, 127–141. PMCID:PMC4556426 https://doi.org/10.1080/21641846.2015.1051291
Jason, L.A.,
So, S., Brown, A.A., Sunnquist, M., & Evans, M.
(2015). Test-retest reliability of the DePaul Symptom Questionnaire. Fatigue:
Biomedicine, Health & Behavior, 3(1), 16-32. PMCID:
PMC4788471 http://doi.org/10.1080/21641846.2014.978110
Jason, L.A.,
Sunnquist, M., Brown, A., Evans, M., Vernon, S.D.,
Furst, J., & Simonis, V. (2014). Examining case definition criteria for
chronic fatigue syndrome and Myalgic
Encephalomyelitis. Fatigue: Biomedicine, Health, and Behavior, 2,
40-56. PMCID:
PMC3912876 https://doi.org/10.1080/21641846.2013.862993
Hutchinson,
C.V., Maltby, J., Badham, S.P., & Jason, L.A. (2014). Vision-related
symptoms as a clinical feature of Chronic Fatigue Syndrome/Myalgic Encephalomyelitis? Evidence from the DePaul Symptom
Questionnaire. British Journal of Ophthalmology, 98,
144-145. https://doi.org/10.1136/bjophthalmol-2013-304439
Brown, A.A.,
& Jason, L.A. (2014). Validating a measure of myalgic
encephalomyelitis/chronic fatigue syndrome symptomatology. Fatigue:
Biomedicine, Health & Behavior, 2, 132–152. PMCID: PMC4871625 https://doi.org/10.1080/21641846.2014.928014
Jason, L.A.,
Brown, A., Evans, M., Sunnquist, M., & Newton,
J.L. (2013). Contrasting Chronic Fatigue Syndrome versus Myalgic
Encephalomyelitis/Chronic Fatigue Syndrome. Fatigue: Biomedicine,
Health & Behavior, 1, 168–183. PMCID:
PMC3728084 https://doi.org/10.1080/21641846.2013.774556
Jason, L.A.,
Evans, M., Porter, N., Brown, M., Brown, A., Hunnell, J., Anderson, V., Lerch,
A., De Meirleir, K., & Friedberg, F. (2010). The
development of a revised Canadian Myalgic
Encephalomyelitis-Chronic Fatigue Syndrome case
definition. American Journal of Biochemistry and Biotechnology, 6(2),
120-135. https://doi.org/10.3844/ajbbsp.2010.120.135
DSQ-2
Bedree, H., Sunnquist, M., & Jason, L.A. (2019). The DePaul Symptom
Questionnaire-2: A validation study. Fatigue: Biomedicine, Health &
Behavior, 7(3), 166-179. PMCID: PMC7367506 https://doi.org/10.1080/21641846.2019.1653471
Jason, L.A.,
Ohanian, D., Brown, A., Sunnquist, M., McManimen, S., Klebek, L., Fox,
P., & Sorenson, M. (2017). Differentiating Multiple Sclerosis from Myalgic Encephalomyelitis and Chronic Fatigue
Syndrome. Insights in Biomedicine, 2:11. PMCID: PMC5800741 https://doi.org/10.21767/2572-5610.100011
DSQ-SF (Short-Form)
Shaheen,
N., & Shaheen, A. (2022). Study Protocol Clinical Trial Medicine ®
Long-term sequelae of COVID-19 (myalgic
encephalomyelitis) An international cross-sectional study. Medicine, 101: e31819.
10.1097/MD.0000000000031819.
Rekeland IG, Sørland
K, Bruland O, Risa K, Alme K, Dahl O, et al. (2022) Activity monitoring and
patient-reported outcome measures in Myalgic
Encephalomyelitis/Chronic Fatigue Syndrome patients. PLoS
ONE 17(9): e0274472. https://doi.org/10.1371/journal.pone.0274472
Jimeno‑Almazán,
A., Martínez‑Cava, A., Buendía‑Romero,
A., Franco‑López, F., Sánchez‑Agar, J.A., Sánchez‑Alcaraz,
B.J., Tufano, J.J., Pallarés, J.G., & Courel‑Ibáñez, J. (2022). Relationship between the
severity of persistent symptoms, physical fitness, and cardiopulmonary function
in post‑COVID‑19 condition. A population‑based analysis.
Internal and Emergency Medicine. https://doi.org/10.1007/s11739-022-03039-0
Froehlich, L.,
Hattesohl, D.B.R., Cotler, J., Jason, L.A.,
Scheibenbogen, C., & Behrends, U. (2021b). Causal attributions and
perceived stigma for Myalgic Encephalomyelitis/
Chronic Fatigue Syndrome. Journal of Health Psychology. Published online July
9, 2021. https://doi.org/10.1177/13591053211027631
Froehlich,
L., Hattesohl, D. B. R., Jason, L. A., Scheibenbogen,
C., Behrends, U., & Thoma, M. (2021). Medical
care situation of people with Myalgic
Encephalomyelitis/Chronic fatigue syndrome in Germany. Medicina, 57(7), 646. https://doi.org/10.3390/medicina57070646
Sunnquist, M.,
Lazarus, S., & Jason, L. A. (2019). The development of a short form of the
DePaul Symptom Questionnaire. Rehabilitation Psychology, 64(4),
453–462. https://doi.org/10.1037/rep0000285
DSQ- PEM
Cotler, J.,
Katz, B.Z., Reurts-Post, C., Vermeulen, R., &
Jason, L.A. (2020). A hierarchical logistic regression predicting rapid
respiratory rates from post-exertional malaise. Fatigue: Biomedicine, Health
& Behavior, 8(4), 205-213. PMCID:
PMC9610439. https://doi.org/10.1080/21641846.2020.1845287
Holtzman,
C.S., Fisher, C., Bhatia, S., & Jason, L.A. (2020). Factors affecting the
characterization of post-exertional malaise derived from patient input. Journal
of Health Disparities Research and Practice, 13(2), 51-64.
Holtzman,
C.S., Bhatia, S., Cotler, J., & Jason, L.A. (2019).
Assessment of post-exertional malaise (PEM) in patients with Myalgic Encephalomyelitis (ME) and Chronic
Fatigue Syndrome (CFS): A patient-driven survey. Diagnostics, 9(1),
26. PMCID:
PMC6468435 https://doi.org/10.3390/diagnostics9010026
McManimen, S. L., Sunnquist, M. L., & Jason, L. A. (2019). Deconstructing
post-exertional malaise: An exploratory factor analysis. Journal of
Health Psychology, 24(2), 188–198. PMCID: PMC5325824 https://doi.org/10.1177/1359105316664139
Jason, L.A.,
McManimen, S., Sunnquist,
M., & Holtzman, C. (2018). Patient perceptions of post exertional
malaise. Fatigue: Biomedicine, Health & Behavior, 6,
92-105. https://doi.org/10.1080/21641846.2018.1453265
Cotler, J.,
Holtzman, C., Dudun, C., & Jason, L.A. (2018). A
brief questionnaire to assess post-exertional malaise. Diagnostics, 8, 66. https://doi.org/10.3390/diagnostics8030066
DSQ- PED
Sorg, A. L.,
Becht, S., Marietta, J., Armann, J., Both, U. V., Hufnagel, M., Lander, F.,
Liese, J. G., Niehues, T., Verjans, E., Wetzke, M., Stojanov, S., Behrends, U., Drosten, C., Schroten, H., & Kries, R. V. (2022). Association of
SARS-CoV-2 Seropositivity with ME/CFS among children and adolescents in
Germany. JAMA Network Open 5(9). doi:10.1001/jamanetworkopen.2022.33454
Ekberg, K.,
Torres, C., & Jason, L.A. (in press). Parent-child discrepancies in
health-related quality of life of children and adolescents with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome. Quality
of Life Research. Published online June 30, 2021. https://doi.org/10.1007/s11136-021-02919-w
Jason, L.A.,
Katz, B.Z., Sunnquist, M., Torres, C., Cotler, J.,
& Bhatia, S. (2020). The prevalence of pediatric myalgic
encephalomyelitis/chronic fatigue syndrome in a community-based sample. Child
& Youth Care Forum, 49(4), 563-579. PMCID: PMC8186295
https://doi.org/10.1007/s10566-019-09543-3
Schultz,
K.R., Katz, B.Z., Bockian, N.R., & Jason, L.A.
(2019). Relationships between autonomic and orthostatic self-report and
physician ratings of orthostatic intolerance in youth. Clinical
Therapeutics, 41, 633-640. PMCID: PMC6478562 https://doi.org/10.1016/j.clinthera.2019.02.010
Jason LA,
Katz BZ, Mears C, Jantke R, Brown A, Sunnquist M, O'Connor K. (2015). Issues in estimating rates
of pediatric chronic fatigue syndrome and myalgic
encephalomyelitis in a community-based sample. Avicenna J Neuropsychophysiol, 2(4):e37281.
doi: 10.17795/ajnpp-37281
Jason, L.A.,
Porter, N., Shelleby, E.,Till, L., Bell, D.S., Lapp, C.W., Rowe, K., & DeMeirleir, K. (2010). Examining criteria to diagnose
ME/CFS in pediatric samples. Journal of Behavioral Health &
Medicine, 1(3), 186-195. https://doi.org/10.1037/h0100551
Jason, L.A.,
Porter, N., Shelleby, E., Till, L., Bell, D.S., Lapp,
C.W., Rowe, K., & De Meirleir, K. (2009). Severe
versus moderate criteria for the new pediatric case definition for
ME/CFS. Child Psychiatry and Human Development, 40, 609–620. PMID:
19513826 https://doi.org/10.1007/s10578-009-0147-8
DePaul
Post-Exertional Malaise Questionnaire
The Chronic Fatigue Syndrome Attitudes Test Questions
ID# ____________________
Date_____________________
Please answer the following questions.
1. What is your height?
2. What is your weight?
3.
What is your date of birth?
4. What is your gender?
5. To
which of the following race(s) do you belong?
Black,
African-American
White
American
Indian or
Asian
or Pacific Islander
Other race (Please specify)
6. Are you of Latino or Hispanic origin?
Yes
No
7. What is your current marital status?
Married or living with partner
Separated
Widowed
Divorced
Never married
8.
Do you have any children?
Yes No (Skip to Question 9)
8a. How many children do you have?
8b. How many of your children are under 18 years old?
9. How many people live in your home?
10. What grade or degree have you completed in school?
Less than high school
Some high school
High school degree or GED
Partial college (at least one year) or specialized training
Standard college degree
Graduate professional degree including masters and doctorate
11. What is your current work status? (Check all that apply)
On disability
Student
Homemaker
Retired
Unemployed
Working part-time
Working full-time
11a. If you are on disability, for what condition do you receive disability compensation?
Please Specify
12. What is your current occupation?
Current
12a. If you are currently not working, what was your most recent occupation?
Most Recent
For the following questions
(13-66), we would like to know how often
you have had each symptom and how much
each symptom has bothered you over the last 6 months. For each symptom
please circle one number for frequency
and one number for severity. Please fill the chart out from left to
right.
Symptoms |
Frequency: Throughout the past
6 months, how often
have you had this symptom? For each symptom listed below, circle a number from: 0 = none of the time 1 = a little of the time 2 = about half the time 3 = most of the time 4 = all of the time |
Severity: Throughout the past
6 months, how much has
this symptom bothered you? For each symptom listed below, circle a number from: 0 = symptom not present 1 = mild 2 = moderate 3 = severe 4 = very severe |
13) Fatigue/extreme tiredness |
0 1 2 3 4 |
0 1 2 3 4 |
14) Dead, heavy feeling after starting to exercise |
0 1 2 3 4 |
0 1 2 3 4 |
15) Next day soreness or fatigue after non-strenuous, everyday activities |
0 1 2 3 4 |
0 1 2 3 4 |
16) Mentally tired after the slightest effort |
0 1 2 3 4 |
0 1 2 3 4 |
17) Minimum exercise makes you physically tired |
0 1 2 3 4 |
0 1 2 3 4 |
18) Physically drained or sick after mild
activity |
0 1 2 3 4 |
0 1 2 3 4 |
19) Feeling unrefreshed after you wake up in the
morning |
0 1 2 3 4 |
0 1 2 3 4 |
20) Need to nap daily |
0 1 2 3 4 |
0 1 2 3 4 |
21) Problems falling asleep |
0 1 2 3 4 |
0 1 2 3 4 |
22) Problems staying asleep |
0 1 2 3 4 |
0 1 2 3 4 |
23) Waking up early in the morning (e.g. 3am) |
0 1 2 3 4 |
0 1 2 3 4 |
24) Sleep all day and stay awake all night |
0 1 2 3 4 |
0 1 2 3 4 |
25) Pain or aching in your muscles |
0 1 2 3 4 |
0 1 2 3 4 |
26) Pain/stiffness/tenderness in more than one joint
without swelling or redness |
0 1 2 3 4 |
0 1 2 3 4 |
27) Eye pain |
0 1 2 3 4 |
0 1 2 3 4 |
Symptoms |
Frequency: Throughout the past 6 months, how often have you had this
symptom? For each
symptom listed below, circle a number from: 0 = none of the
time 1 = a little of
the time 2 = about half
the time 3 = most of the
time 4 = all of the
time |
Severity: Throughout the past 6 months, how much has this symptom
bothered you? For each
symptom listed below, circle a number from: 0 = symptom not
present 1 = mild 2 = moderate 3= severe 4 = very severe |
28) Chest pain |
0 1 2 3 4 |
0 1 2 3 4 |
29) Bloating |
0 1 2 3 4 |
0 1 2 3 4 |
30) Abdomen/stomach pain |
0 1 2 3 4 |
0 1 2 3 4 |
31) Headaches |
0 1 2 3 4 |
0 1 2 3 4 |
32) Muscle twitches |
0 1 2 3 4 |
0 1 2 3 4 |
33) Muscle weakness |
0 1 2 3 4 |
0 1 2 3 4 |
34) Sensitivity to noise |
0 1 2 3 4 |
0 1 2 3 4 |
35) Sensitivity to bright lights |
0 1 2 3 4 |
0 1 2 3 4 |
36) Problems remembering things |
0 1 2 3 4 |
0 1 2 3 4 |
37) Difficulty paying attention for a long period of
time |
0 1 2 3 4 |
0 1 2 3 4 |
38) Difficulty finding the right word to say or
expressing thoughts |
0 1 2 3 4 |
0 1 2 3 4 |
39) Difficulty understanding things |
0 1 2 3 4 |
0 1 2 3 4 |
40) Only able to focus on one thing at a time |
0 1 2 3 4 |
0 1 2 3 4 |
41) Unable to focus vision and/or attention |
0 1 2 3 4 |
0 1 2 3 4 |
42) Loss of depth perception |
0 1 2 3 4 |
0 1 2 3 4 |
43) Slowness of thought |
0 1 2 3 4 |
0 1 2 3 4 |
44) Absent-mindedness or forgetfulness |
0 1 2 3 4 |
0 1 2 3 4 |
45) Bladder problems |
0 1 2 3 4 |
0 1 2 3 4 |
46) Irritable bowel problems |
0 1 2 3 4 |
0 1 2 3 4 |
Symptoms |
Frequency: Throughout the past 6 months, how often have you had this
symptom? For each
symptom listed below, circle a number from: 0 = none of the
time 1 = a little of
the time 2 = about half
the time 3 = most of the
time 4 = all of the
time |
Severity: Throughout the past 6 months, how much has this symptom
bothered you? For each
symptom listed below, circle a number from: 0 = symptom not
present 1 = mild 2 = moderate 3= severe 4 = very severe |
47) Nausea |
0 1 2 3 4 |
0 1 2 3 4 |
48) Feeling unsteady on your feet, like you might
fall |
0 1 2 3 4 |
0 1 2 3 4 |
49) Shortness of breath or trouble catching your
breath |
0 1 2 3 4 |
0 1 2 3 4 |
50) Dizziness or fainting |
0 1 2 3 4 |
0 1 2 3 4 |
51) Irregular heart beats |
0 1 2 3 4 |
0 1 2 3 4 |
52) Losing or gaining weight without trying |
0 1 2 3 4 |
0 1 2 3 4 |
53) No appetite |
0 1 2 3 4 |
0 1 2 3 4 |
54) Sweating hands |
0 1 2 3 4 |
0 1 2 3 4 |
55) Night sweats |
0 1 2 3 4 |
0 1 2 3 4 |
56) Cold limbs (e.g. arms, legs, hands) |
0 1 2 3 4 |
0 1 2 3 4 |
57) Feeling chills or shivers |
0 1 2 3 4 |
0 1 2 3 4 |
58) Feeling hot or cold for no reason |
0 1 2 3 4 |
0 1 2 3 4 |
59) Feeling like you have a high temperature |
0 1 2 3 4 |
0 1 2 3 4 |
60) Feeling like you have a low temperature |
0 1 2 3 4 |
0 1 2 3 4 |
61) Alcohol intolerance |
0 1 2 3 4 |
0 1 2 3 4 |
62) Sore throat |
0 1 2 3 4 |
0 1 2 3 4 |
63) Tender/sore lymph nodes |
0 1 2 3 4 |
0 1 2 3 4 |
64) Fever |
0 1 2 3 4 |
0 1 2 3 4 |
65) Flu-like symptoms |
0 1 2 3 4 |
0 1 2 3 4 |
66) Some smells, foods, medications, or chemicals
make you feel sick |
0 1 2 3 4 |
0 1 2 3 4 |
67. Have you always had persistent or recurring fatigue/energy problems, even back to your earliest memories as a child? (By persistent or recurring, we mean that the fatigue/energy problems are usually ongoing and constant, but sometimes there are good periods and bad periods.)
Yes
No Not having a
problem with fatigue/energy
68. Since your fatigue/energy related illness began, do your headaches either happen more often, feel worse or more severe, or are they in a different place or spot?
Yes No Not having a problem with fatigue/energy
69. How long ago did your problem with fatigue/energy begin?
Less than 6 months
6-12 months
1-2 years
Longer than 2 years
Had problem with fatigue/energy since childhood or adolescence
Not having a problem with fatigue/energy
70. Have you been diagnosed with Chronic
Fatigue Syndrome or Myalgic Encephalomyelitis?
Yes No
70a. If yes, what
year were you diagnosed?
70b.
Do you currently have a diagnosis of Chronic Fatigue Syndrome or Myalgic Encephalomyelitis?
Yes No
70c.
Who diagnosed you with Chronic Fatigue Syndrome or Myalgic Encephalomyelitis?
Medical
Doctor
Alternative Practitioner
Self-Diagnosed
70d.
Have any of your family members been diagnosed with Chronic Fatigue Syndrome or Myalgic
Encephalomyelitis?
Yes No
If yes, please list their relation to you and
current age
71.
Did you experience any of the following symptoms regularly and
repeatedly in the months and years before your fatigue/energy problems
began?
Sore throat
Tender/sore lymph nodes
Unrefreshing sleep
Impaired memory and concentration
Prolonged fatigue following physical or mental exertion
Muscle pain
Headaches
Joint Pain
Not having a problem with fatigue/energy
72. If you rest, does your problem with fatigue/energy go away? (Check one)
Entirely
Partially
My fatigue/energy problem is not improved by rest (Skip to Question 73)
I am
not having a problem with fatigue/energy (Skip
to Question 73)
72a. How long do you have to rest for your problem with fatigue/energy to entirely or partially go away?
less than 30 minutes 30 to 59
minutes 1-2
hours more than 2
hours
73. If you were to become exhausted after actively participating in extracurricular activities, sports, or outings with friends, would you recover within an hour or two after the activity ended?
Yes
No
74. Do you reduce your activity level to avoid experiencing problems
with fatigue/energy?
Yes No Not having a
problem with fatigue/energy
75. Do you experience a worsening of your fatigue/energy related illness after
engaging in minimal physical effort?
Yes No Not having a
problem with fatigue/energy
75a.
Do you experience a worsening of your fatigue/energy
related illness after engaging in mental
effort?
Yes No
75b. If you feel
worse after activities, how long does this last? (Check one)
1 hour
or less 2-3 Hrs
4-10 Hrs
11-13 Hrs
14-23 Hrs
More than 24 Hrs (Please specify__________)
76. Are you currently engaging in any form of exercise?
Yes (Skip to Question 77) No
76a. If you do not
exercise, why aren’t you exercising? (Check all boxes that you agree with)
Not
interested
No time
Would like to
but cannot because of problems with fatigue/energy
Cannot because exercise makes symptoms worse
77. Over what
period of time did your fatigue/energy
related illness, develop? (Check
one)
Within 24 hours
Over 1 week
Over 1 month
Over 2-6 months
Over 7-12 months
Over 1-2 years
Over 3 or more years
I am not ill
78. How would you describe the course of your fatigue/energy related illness? (Check one)
Constantly getting worse
Constantly improving
Persisting (no change)
Relapsing & remitting (having “good” periods with no symptoms & “bad”
periods)
Fluctuating (symptoms periodically get better and get worse, but never
disappear completely)
No Symptoms/I am not ill
79. Which statement best describes your fatigue/energy related illness during the last 6 months? (Check one)
I am not able to work or do anything, and I am bedridden.
I can walk around the house, but I cannot do light housework.
I can do light housework, but I cannot work part-time.
I can only work part-time at work or on some family responsibilities.
I can work full time, but I have no energy left for anything else.
I can work full time and finish some family responsibilities but I have no energy left
for anything else.
I can do all work or family responsibilities without any problems with my energy.
80. Did your fatigue/energy related illness start after you experienced any of the following? (Check one or more and please specify)
An infectious illness
An accident
A trip or vacation
An immunization (shot at doctor’s office)
Surgery
Severe stress (bad or unhappy event(s))
Other
I am not ill
81. Have you ever consulted a medical doctor or health professional about your fatigue/energy problem?
Yes No (Skip to Question 83)
82. Do you currently have a medical doctor overseeing your fatigue/energy problem?
Yes No
83. Do you have any medical illness (es) that might be causing your symptoms?
Yes
No (Skip to Question 84)
83a. What medical illnesses do you have?
Illness
name(s) and year it began:
83b. For which of these conditions are you currently
receiving treatment?
84. Are you currently taking any medications
(over the counter or prescription)?
Yes
No (Skip to Question 86)
84a. What
medications are you taking?
85. Do you think any medication(s) is (are) causing your problem with fatigue/energy?
Yes No (Skip to Question 86)
I do not have a problem with fatigue/energy (Skip to Question 86)
85a. Please specify which medications:
86.
Have you ever been diagnosed and/or treated for any of the following: (Check all that apply and write year (s) experienced,
years treated, and medication (if applicable) in the blank)
Major depression
Major depression with melancholic or psychotic features
Bipolar disorder (Manic-depression)
Anxiety
Schizophrenia
Eating disorder
Substance abuse
Multiple chemical sensitivities
Fibromyalgia
Allergies
Other (Please specify)
No diagnosis/treatment
87. What do you think is the cause of your
problem with fatigue/energy? (Check one)
Definitely physical
Mainly physical
Equally physical and
psychological
Mainly psychological
Definitely psychological
No problem with fatigue/energy
88. Do you think anything specific in your
personal life or environment accounts for your problem with fatigue/energy?
Yes
No (Skip to Question 89)
I do not have a problem with fatigue/energy
(Skip to Question 89)
88a. Please specify:
89. In the past 4 weeks, approximately how many hours per week have you spent doing:
Household related
activities? hours per
week
Social/Recreational related
activities? hours per week
Family related activities? hours per week
Work related activities? hours per
week
90. In the past 4 weeks, have you
had to reduce the number of hours you previously spent (prior to your illness)
on occupational, social or family activities because of your health or problems with fatigue/energy?
Yes
No (Skip to Question 91) Not having a
problem with fatigue/energy
90a.
Before your fatigue/energy related
illness, approximately how many hours did you used to spend on:
Household related activities? hours per week
Social/Recreational related activities? hours
per week
Family related activities? hours
per week
Work related
activities? hours
per week
91. Please rate the amount of energy you had available yesterday, using a scale from 1 to 100 where 1= no energy and 100 = your pre-illness energy level. (If you don't have a fatigue/energy related illness, a score of 100 = having abundant energy such that you could work full time and complete your family responsibilities)
92. Please rate the amount of energy you expended (used) yesterday, using a scale from 1 to 100 where 1 = no energy and 100 = your pre-illness energy expended
93. Please rate the amount of fatigue you had yesterday, using a scale from 1 to 100 where 1 = no fatigue and 100 = severe fatigue
94. For the past week, please rate the amount of energy you had available using a scale from 1 to 100 where 1 = no energy and 100 = your pre-illness energy level
95. For the past week, please rate the amount of energy you have expended (used) using a scale from 1 to 100 where 1 = no energy and 100 = your pre-illness energy expended
96. For the past week,
please rate the amount of fatigue you have had using a scale from 1 to
100 where 1 = no fatigue and 100 = severe fatigue
97. Since the onset of your problems with fatigue/energy, have your symptoms caused a 50% or greater reduction in your activity level?
Yes No Not having a
problem with fatigue/energy
98. Do you experience frequent viral infections with prolonged recovery periods?
Yes No
99. Are you intolerant of extremes of temperatures (when it is extremely hot or cold)?
Yes No
MOS SURVEY
INSTRUCTIONS:
This
survey asks for your views about your health.
This information will help keep track of how you feel and
how
well you are able to do your usual activities. Answer
every question by marking the answer as
indicated. If you
are unsure about how to answer a question, please give the best answer you can.
1. In
general, would you say your health is: (Please circle one)
Excellent......................................................................... 1
Very
good....................................................................... 2
Good............................................................................... 3
Fair.................................................................................. 4
Poor................................................................................. 5
2. Compared to one year ago, how
would you rate your health in general now? (Please circle one)
Much
better than one year ago.................................... 1
Somewhat
better now than one year ago................... 2
About
the same as one year ago................................. 3
Somewhat
worse now than one year ago.................. 4
Much
worse now than one year ago........................... 5
3. The following items are about
activities you might do during a typical day.
Does your health now
limit
you in these activities? If so, how much?
Activities |
Yes, Limited A |
Yes, A Little |
No, Not Limited At All |
Vigorous
activities: running, lifting heavy objects,
participating in strenuous sports |
1 |
2 |
3 |
Moderate
activities: moving a table, pushing a vacuum cleaner,
bowling, playing golf |
1 |
2 |
3 |
Lifting or carrying groceries |
1 |
2 |
3 |
Climbing
several flights of stairs |
1 |
2 |
3 |
Climbing
one flight of stairs |
1 |
2 |
3 |
Bending, kneeling, or stooping |
1 |
2 |
3 |
Walking
more than a mile |
1 |
2 |
3 |
Walking several
blocks |
1 |
2 |
3 |
Walking one
block |
1 |
2 |
3 |
Bathing or dressing
yourself |
1 |
2 |
3 |
4. During the past 4 weeks, have you had any of the following problems
with your work or other
regular daily activities as a result of your physical
health?
Problems |
Yes |
No |
Cut down on the amount of time you spent
on work or other activities |
1 |
2 |
Accomplished
less than you would like |
1 |
2 |
Were limited in the kind of work or other activities |
1 |
2 |
Had difficulty
performing the work or other activities (For example, it took extra effort) |
1 |
2 |
5. During the past 4 weeks, have you had any of the following problems
with your work or other
regular
daily activities as
a result of any
emotional problems (such as feeling depressed or anxious)?
Problems |
Yes |
No |
Cut down the amount of time you spent on work or other activities |
1 |
2 |
Accomplished
less than you would like |
1 |
2 |
Didn’t do work or other activities as carefully as usual |
1 |
2 |
6. During the past 4 weeks, to what extent has your physical health or
emotional problems interfered with
your
normal social activities with family, neighbors, or groups? (Please
circle one)
Not
at all......................................................................... 1
Slightly............................................................................ 2
Moderately...................................................................... 3
Quite
a bit....................................................................... 4
Extremely........................................................................ 5
7. How
much bodily pain have you had during the past
4 weeks?
None............................................................................... 1
Very
mild......................................................................... 2
Mild.................................................................................. 3
Moderate........................................................................ 4
Severe............................................................................ 5
Very
Severe................................................................... 6
8. During the past 4 weeks, how much did pain interfere with your normal
work (including both work
outside
the home and housework)?
Not
at all......................................................................... 1
Slightly............................................................................ 2
Moderately...................................................................... 3
Quite
a bit....................................................................... 4
Extremely........................................................................ 5
9. These questions are about how you feel and how
things have been with you during the
past 4 weeks.
For each question, please give the one
answer that comes closest to the way you have been feeling. How
much of the time during the past 4
weeks-
Questions |
All of the Time |
Most of the Time |
A Good Bit of the Time |
Some of the Time |
A Little of the Time |
None of the Time |
Did you feel full of pep? |
1 |
2 |
3 |
4 |
5 |
6 |
Have you been a nervous person? |
1 |
2 |
3 |
4 |
5 |
6 |
Have you felt so down in the dumps that
nothing could cheer you up? |
1 |
2 |
3 |
4 |
5 |
6 |
Have you felt calm and peaceful? |
1 |
2 |
3 |
4 |
5 |
6 |
Did you have a lot of energy? |
1 |
2 |
3 |
4 |
5 |
6 |
Have you felt down-hearted and blue? |
1 |
2 |
3 |
4 |
5 |
6 |
Did you feel worn out? |
1 |
2 |
3 |
4 |
5 |
6 |
Have you been a happy person? |
1 |
2 |
3 |
4 |
5 |
6 |
Did you feel tired? |
1 |
2 |
3 |
4 |
5 |
6 |
10. During the past 4 weeks, how much of the time has your physical health
or
emotional problems interfered
with your social activities (like visiting with friends,
relatives, etc.)?
All
of the time................................................................. 1
Most
of the time............................................................. 2
Some
of the time............................................................ 3
A
little of the time........................................................... 4
None
of the time............................................................ 5
11. How TRUE or FALSE is each of following statements for you?
Statements |
Definitely True |
Mostly True |
Don’t Know |
Mostly False |
Definitely False |
I seem to get sick a little easier than other
people |
1 |
2 |
3 |
4 |
5 |
I am as healthy as anybody I know |
1 |
2 |
3 |
4 |
5 |
I expect my health to get worse |
1 |
2 |
3 |
4 |
5 |
My health is excellent |
1 |
2 |
3 |
4 |
5 |
The DePaul
Post-Exertional Malaise Questionnaire (DPEMQ)
Section 1: Demographic and Illness Information
1.
What is your age?
(must
be over 18 years old)
2.
What is your gender?
q Male
q Female
q Other
q Prefer not to answer
3. To which of the following race(s) do you belong?
q
Black, African-American
q
White
q
American Indian or Alaska Native
q
Asian or Pacific Islander
4. Other race (Please specify)
5. Are you of Latino or Hispanic origin?
q Yes
q No
6. Do you currently live in the United States?
q
Yes
q
No
6a. If you do not live in the United States, what country do you
currently live in?
________________________________________________________________
7. What is your current marital status?
q Married or living with partner
q Separated
q Widowed
q Divorced
q Never married
q Prefer not to answer
8. What is the highest degree or level of education you have completed?
q Less than high school
q Some high school
q High school degree or GED
q Partial college/university (at least one
year) or specialized training
q Standard college/university degree
q Graduate professional degree including
masters and doctorate
9. What is your current work status? (Check all that apply)
q On disability
q Student
q Homemaker
q Retired
q Unemployed
q Working part-time
q Working full-time
9a. If you are on disability, for what condition do you receive disability compensation?
Please Specify
10. If you are currently working, what work do you do and what is your job title?
Current
11. If you are currently not working, what was the type of work you did and what was your job title?
Most Recent
12. Prior to leaving the workforce, did you cut back either in number of hours worked or in
work responsibilities?
q Yes
q No
13. What is your current annual income in US
dollars?
q Less than $24,999
q $25,000 to $49,999
q $50,000 to $99,999
q $100,000 to $149,999
q $150,000 to $199,999
q $200,000 to $249,999
q $250,000 or more
q Prefer Not to Respond
14. What was your annual income prior to becoming ill in US dollars?
q Less than $24,999
q $25,000 to $49,999
q $50,000 to $99,999
q $100,000 to $149,999
q $150,000 to $199,999
q $200,000 to $249,999
q $250,000 or more
q Prefer Not to Respond
15. What have you been diagnosed with?
q Chronic Fatigue Syndrome (CFS)
q Myalgic Encephalomyelitis (ME)
16. Other (please specify) ______________
17. If you have a diagnosis, what year were you diagnosed?
18. What age were you when you were diagnosed? _______________
19. Who diagnosed you?
q Medical Doctor
q Alternative Practitioner
q Self-Diagnosed
19a.
If you were diagnosed by a medical doctor, was he/she an expert/knowledgeable
of ME or CFS?
q Yes
q No
20. How long ago did your problem with ME or
CFS begin?
q
Less
than 6 months
q
6-11
months
q
1-2
years
q
3-5
years
q
6-10
years
q
Over 10
years
q
Had
problem with ME or CFS since childhood or adolescence
q
Not
having a problem with ME or CFS
21. Has your ME or CFS illness been present for more than 50% of the time since you became ill?
q Yes
q No
22. How would you describe the course of your
ME or CFS illness? (Check one)
q Constantly getting worse
q Constantly improving
q Persisting (no change)
q Relapsing & remitting (having “good”
periods with no symptoms & “bad” periods)
q Fluctuating (symptoms periodically get better
and get worse, but never disappear completely)
q No Symptoms/I am not ill.
23. Which statement best describes your ME or
CFS illness during the last 6 months? (Check one)
q I am not able to work or do anything, and I
am bedridden/completely incapacitated.
q I can walk around the house, but I cannot do
light housework.
q I can do light housework, but I cannot work
part-time.
q I can only work part-time at work or on some
family responsibilities.
q I can work full time, but I have no energy
left for anything else.
q I can work full time and finish some family
responsibilities but I have no energy left for anything else.
q I can do all work or family responsibilities
without any problems with my energy.
Section
2: Onset and Triggers
24. Is the onset of your symptom exacerbation ever immediately after exertion?
q Yes
q No
24a.If you answered yes, do you experience immediate symptom exacerbation after exertion:
q All of the time
q Most of the time
q About half the time
q A little of the time
24b. If your onset is immediate, please indicate after what activities:
_______________________________________________________________
24c. If your onset is immediate, please indicate for which symptoms:
_____________________________________________________________
25. Is the onset of your symptom exacerbation ever delayed after exertion?
q Yes
q No
25a.If you answered yes, do you experience immediate symptom exacerbation after exertion:
q All of the time
q Most of the time
q About half the time
q A little of the time
25b. If your onset is delayed, indicate how long after the exertion does your symptom exacerbation occur (you may check more than one box):
q 1 hour or less
q 2-6 hrs
q 7-12 hrs
q 13-24 hrs
q 1-2 days
q 3-4 days
q 5-6 days
q More than 1 week
25c. If your onset is delayed, please indicate after what activities:
_______________________________________________________________
25d. If your onset is delayed, please indicate for which symptoms:
_____________________________________________________________
26. Do basic activities of daily living like going to the toilet, bathing, dressing, communicating, and/or reading trigger your symptom exacerbation?
q Yes
q No
26a. If you answered yes, do you experience the worsening of symptoms after exertion:
q All of the time
q Most of the time
q About half the time
q A little of the time
27. Do positional changes (e.g., your body position is shifted from the lying down to standing) lead to symptom exacerbation?
q Yes
q No
27a. If you answered yes, do you experience the worsening of symptoms after exertion:
q All of the time
q Most of the time
q About half the time
q A little of the time
28. Does emotional stress (good or bad) lead to symptom exacerbation?
q Yes
q No
26a. If you answered yes, do you experience the worsening of symptoms after exertion:
q All of the time
q Most of the time
q About half the time
q A little of the time
29. Are there some instances in which the specific precipitants of your symptom exacerbation cannot be identified?
q Yes
q No
30. On a day
you are recovering from symptom exacerbation, does it take less exposure that
usual to a trigger to exacerbate your symptoms?
q Yes
q No
31. If you have mild overexertion over several days, can this also produce an abnormal physical or cognitive response?
q Yes
q No
32. Do you have other triggers that provoke symptom exacerbation such as (check box if yes):
q Chemicals
q Foods
q Light
q Heat
q Cold
q Noise
q Visual overload
q Watching movement (such as a video)
q Sensory overload
Section
3: Consequences and Symptoms
33. If you go beyond your energy limits by engaging in pre-illness tolerated exercise or activities of daily living, do you experience any of the following (check box if yes):
q An abnormal response to minimal amounts of
physical and/or cognitive exertion
q An onset that is immediate or delayed by
hours or days
q A severity and duration of symptoms that are
out of proportion to the initial trigger
q A loss of functional capacity and/or stamina
q Post-exertional exhaustion
q Symptom exacerbation
Section 4: In the next set of questions, indicate whether or not the following symptoms made worse due to physical or cognitive exertion (which we will refer to as “symptom exacerbation”):
Symptoms |
Frequency: Throughout the past 6 months, how often have you had this
symptom? For each symptom listed
below, circle a number from: 0 = none of the time 1 = a little of the time 2 = about half the time 3 = most of the time 4 = all of the time |
Severity: Throughout the past 6 months, how much has this symptom
bothered you? For each symptom listed
below, circle a number from: 0 = symptom not present 1 = mild 2 = moderate 3 = severe 4= very severe |
34. Reduced stamina and/or
functional capacity |
0 1
2 3 4 |
0 1 2 3 4 |
35. Physically fatigued
while mentally wired |
0 1
2 3 4 |
0 1 2 3 4 |
36. Cognitive exhaustion |
0 1
2 3 4 |
0 1 2 3 4 |
37. Problems thinking |
0 1
2 3 4 |
0 1 2 3 4 |
38. Unrefreshing sleep |
0 1
2 3 4 |
0 1 2 3 4 |
39. Insomnia |
0 1
2 3 4 |
0 1 2 3 4 |
40. Muscle pain |
0 1
2 3 4 |
0 1 2 3 4 |
41. Muscle
weakness/instability |
0 1
2 3 4 |
0 1 2 3 4 |
42. Aches all over your
body |
0 1
2 3 4 |
0 1 2 3 4 |
43. Dizziness |
0 1
2 3 4 |
0 1 2 3 4 |
44. Flu-like symptoms |
0 1
2 3 4 |
0 1 2 3 4 |
45. Temperature
dysregulation |
0 1
2 3 4 |
0 1 2 3 4 |
46. Please list any other PEM symptoms you experience:
______________________________________________________________________________
______________________________________________________________________________
Section 5: Duration,
Recovery, and Pacing
47. Does your prolonged, unpredictable recovery period from symptom exacerbation last days, weeks, or even months?
q Yes
q No
47a. If yes, how long does your prolonged, unpredictable recovery period typically last (you may check more than one box):
q Within 24 hours
q Between 24 hours and 1 week
q Between 1 week and 1 month
q Between 1 month and 6 months
q Between 6 months and 12 months
q Between 12 months and 2 years
q Over 2 years
48. Is the severity and duration of your symptom exacerbation out-of-proportion to the type of the exertion?
q Yes
q No
48a. If you answered yes, do you experience the worsening of symptoms after exertion:
q All of the time
q Most of the time
q About half the time
q A little of the time
49. Is the severity and duration of your symptom exacerbation symptoms out-of-proportion to the intensity of the exertion?
q Yes
q No
49a. If you answered yes, do you experience the worsening of symptoms after exertion:
q All of the time
q Most of the time
q About half the time
q A little of the time
50. Is the severity and duration of your symptom exacerbation out-of-proportion to the frequency of the exertion?
q Yes
q No
50a. If you answered yes, do you experience the worsening of symptoms after exertion:
q All of the time
q Most of the time
q About half the time
q A little of the time
51. Is the severity and duration of your symptom exacerbation out-of-proportion to the duration of the exertion?
q Yes
q No
51a. If you answered yes, do you experience the worsening of symptoms after exertion:
q All of the time
q Most of the time
q About half the time
q A little of the time
52. Does pacing allow you to completely avoid your symptom exacerbation?
q Yes
q No
53. Does pacing allow you to avoid only to a certain degree your symptom exacerbation?
q Yes
q No
53a. If yes, how frequently do you find pacing to be effective in avoiding symptom exacerbation?
q All of the time
q Most of the time
q About half the time
q A little of the time
53b. If yes, how effectively do you find pacing to be in reducing the level of severity of your symptoms?
q Very effective
q Moderately effective
q Mildly effective
q Barely effective
______________________________________________________________________________
Fennell Scale
(Jason, Fennell, Klein, Fricano, Halpert, & Taylor, 1999)
Rate each of the items below on a five point scale
1= definitely do not agree
2=do not agree
3=somewhat agree
4=agree
5=very strongly agree
___1. I feel like I am falling apart.a
___2. I am just beginning to recognize when and how my
symptoms occur.b
___3. I am beginning to accept the fact that I will never be
completely like I was before the illness and that I will need to become a
new person.b
___4. I now have learned that living with the illness
involves getting sicker, at times, and improving, at times.c
___5. The primary way for me to improve is if my physician
finds me the right treatment.a
___6. I am beginning to seek support and information from
others who have or who know about the illness.b
___7. I am in the early process of creating meaning about my
illness experience.b
___8. I have gained a sense of myself that is blended - a
combination of my life before and after I first got sick.c
___9. I need to know with certainty when and if I am going to
get better.a
___10. I am just starting to feel like I have some control of my life.b
___11. I am beginning to learn how to live with the unknown or chronic
nature of my illness.b
___12. I have better and more satisfying relationships with people I care
about since I first became sick.d
___13. It is my fault I got sick.d
___14. I am just starting to realize that there may be things I can do to
help myself feel better.b
___15. I am starting to see my illness experience as having some value.b
___16. I am proud of myself for living with this illness.c
___17. I think about my illness all of the time.a
___18. I am just beginning to stabilize (i.e., feeling a bit less
confused and a bit more ordered).b
___19. For the first time, I am beginning to have compassion and love for
myself and for what I have endured.b
___20. I am a better and wiser person since I first got sick.c
a = Crisis Factor
b = Stabilization Factor
c = Integration Factor
d = Item did not significantly load
The Crisis mean score was calculated by adding items 1, 5, 9, and 17 of the Fennell Phase Inventory and dividing by four. The Stabilization mean score was calculated by adding items 2, 3, 6, 7, 10, 11, 14, 15, 18, and 19 of the Fennell Phase Inventory and dividing by ten. The Integration mean score was calculated by adding items 4, 8, 16, and 20 of the Fennell Phase Inventory and dividing by four.
These scoring criteria are in Jason, Fricano, Taylor, Halpert, Fennell, Klein, and Levine (in press). Using Crisis, Stabilization, and Integration mean scores (see above), each participant was then assigned to one of the four groups according to the following algorithmic criteria derived from the cluster analysis from the data in the Jason, Fennell, Klein, Fricano, Halpert, and Taylor (1999) study. Criteria for the Crisis group were a Crisis score of 3.00 or above and Stabilization and Integration scores of 3.30 or below. Criteria for the Integration group were a Crisis score of 2.50 or below, a Stabilization score of 2.80 or below and an Integration score of 4.25 or above. Cases not in either of these groups that had either a Crisis score 3.10 or above, a Stabilization score 3.40 or above, or an Integration score of 3.75 or above were classified into a Resolution group. Cases that did not meet any of the above criteria comprised the Stabilization group.
The Chronic Fatigue Syndrome Attitudes Test Questions
(Schlaes, Jason, & Ferrari, 1999)
1.) Children with CFS should be allowed to attend regular classes
2.) Employers should be permitted to fire those with CFS.
3.) People with CFS are just depressed.
4.) More federal funds should be allocated for research on CFS
5.) People with CFS are lazy.
6.) I would continue to visit and support a friend who had CFS.
7.) People with CFS should not be discriminated against in any way.
8.) CFS is not a real medical illness.
9.) I would shake hands with someone with CFS.
10.) The majority of people with CFS were competitive, driven to achieve, and compulsive before they got sick.
11.) I would not sit on the same toilet that a person with CFS had just used.
12.) CFS is not as big a problem as the media suggests.
13.) People with CFS would get better if they really wanted to be healthy.
14.) CFS is primarily a psychological disorder.
15.) The majority of people with CFS have a high socio-economic status.
16.) CFS is one of the leading medical problems in the country.
17.) If people with CFS rest then they will get better.
18.) People with CFS are to blame for getting sick.
19.) CFS is a form of punishment from GOD.
Each item is scored on a 7 point scale from strongly
disagree (1) to strongly agree (7).
For scoring purposes, use only items 2,3,4,5,8,10,11,12,13,14,17,18, and 19
(reverse score item 4).
You can sum these items for an overall composite score and
also add up the items below to use the following three factor scores:
Responsibility for CFS: items 3,5,11,18,19.
Relevance of CFS: items 2,4,8,12.
Traits of people with CFS: items 10,13,14,17.