Sleep Related Questionnaires

Sleep Disorders Questionnaire

Name of questionnaire Sleep Disorders Questionnaire
Type of questionnaire-description,age Measures sleep disturbance and usual sleep habits during the past month only.
Number of items 175 items
Number of domains & categories 4 Sleep disorders: sleep apnea (SA), narcolepsy (NAR), periodic limb movements (PLM) and psychiatric (PSY) sleep disorder
Name of categories/domains   Sleep quality, sleep latency, sleep duration, habitual sleep
efficiency, sleep disturbances, use of sleeping medications, and
daytime dysfunction
Scaling of items 0-5
Scoring available: with permission or free Available, with permission
Scoring test-retest reliability Yes, Spearman rho: SA 0.842, NAR 0.753, PSY 0.848 and PLM 0.817.
Scoring Internal consistency Yes
Validity Yes, clinical evaluation and polysomnography
Language English
Translations in other languages (if yes, then list the languages) Dutch
Developer name A Douglass,  MD, et al
Developer contact information


Dr. Alan Douglass
Royal Ottawa Hospital
1145 Carling Ave.
OTTAWA, ON, Canada
K1Z 7K4

Availability of questionnaire: needs permission from developer, cost or freely available With permisssion from developer
Limitations Control group age <35 years
Link to the questionnaire (if available) Click Here to View the Questionaire
Other comments Testing time is 30 min. SDQ scale scores best distinguished the apnea and narcolepsy groups from the other groups in this sample. PLM scale showed the poorest sensitivity, specificity, PPV and NPV. 
References (including original publication) Douglass AB, Bornstein R, Nino-Murcia G, et al. The Sleep Disorders Questionnaire.I: Creation and multivariate structure of SDQ. Sleep 1994;17:160-7.
Weatherwax KJ, Lin X, Marzec ML, et al. Obstructive sleep apnea in epilepsy patients: the Sleep Apnea scale of the Sleep Disorders Questionnaire (SA-SDQ) is a useful screening instrument for obstructive sleep apnea in a disease-specific population. Sleep Med. 2003;4:517–521.