The Sleep Assessment Questionnaire© (SAQ©) is a 17 item self-administered questionnaire. It
has been shown to be a highly sensitive and specific measure capable of discriminating patients
with sleep disorders from controls (free of sleep disturbances).Factor analysis of the 17 items have identified the following six sleep factors;
ii) Non-restorative Sleep
iv) Daytime Sleepiness
v) Sleep Apnea
vi) Sleep Schedule Disorder
Receiver Operating Curves (ROC’s) have been calculated for the total SAQ© score as well as for
the following factor scores: insomnia, non-restorative sleep, restlessness, daytime sleepiness, and
sleep apnea. The ROC’s show the sensitivity/specificity at various cut-offs.
The SAQ© has been evaluated for its sensibility, reliability, validity and responsiveness to
1. Cesta A, Moldofsky H, Sammut C. The University of Toronto Sleep Assessment
Questionnaire (SAQ). Sleep Res, 25:486, 1996.
2. Cesta A, Moldofsky H, Sammut C. The University of Toronto Sleep Assessment
Questionnaire (SAQ). Sleep Res, 26:646, 1997.
3. Cesta A, Moldofsky H, Sammut C. The sensitivity and specificity of the Sleep Assessment
Questionnaire© (SAQ©) as a measure of non-restorative sleep. Sleep, 22(1 Suppl): 14, 1999.
4. Mansfield RW, Cesta A, Sammut C, Moldofsky H. The sensitivity and specificity of the Sleep
Assessment Questionnaire© in the identification of patients with insomnia, restless legs
syndrome/periodic limb movement disorder, and narcolepsy/idiopathic hypersomnia. Sleep,
23(Suppl.2): A381, 2000.
5. Moldofsky H, Cesta A, Sammut C, Unger ER, Nisenbaum R., Reeves WC. Sleep disorders in
a population-based study of chronic fatiguing illnesses with Sleep Assessment Questionnaire©.
Sleep, 23(Suppl.2): A67, 2000.
6. Reeves WC, Nisenbaum R, Moldofsky H, Cesta A, Sammut C, Reyes M, Unger ER, Sleep
assessment in population-based study of chronic fatigue syndrome, Sleep, 26: A370, 2003.
For further information, please visit the TPRF website at: www.tprf.ca.
Other Links and Publications
Abstract presented at APSS 2003 Chicago
Publication in Chronic Fatigue Syndrome
Neurology 2004, 4:6 (19 Apr 2004)
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