Sleep Related Questionnaires

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Functional Outcomes of Sleep Questionnaire (FOSQ)

Name of questionnaire Functional Outcomes of Sleep Questionnaire (FOSQ)
Type of original questionnaire-description, age/population Disease specific quality of life questionnaire to determine functional status in adults; measures are designed to assess the impact of disorders of excessive sleepiness on multiple activities of everyday living and the extent to which these abilities are improved by effective treatment. 
Number of items 30 (long form), 10 (short form)
Number of domains & categories 5 factor subscales
Name of categories/domains   Activity level, vigilance, intimacy and sexual relationships, general productivity, social outcome, rate the difficulty of performing a given activity on a 4-point scale (no difficulty to extreme difficulty)
Scaling of items 0-4 or 0-6
Scoring available: with permission or free Permission required, no cost
Scoring test-retest reliability Yes, total scale: alpha = 0.95
Scoring internal consistency Yes, total scale: r = 0.90
Validity Yes, concurrent validity using SIP and the SF36; discriminant validity present
Available forms (short and/or long etc.) FOSQ (long form) and FOSQ-10 (short form)
Language English
Translations in other languages (if yes, then list the languages) Swedish, German, Spanish, Turkish, Norwegian
Developer(s) name Terri Weaver, PhD, RN, FAAN
Developer contact information for permission

University of Illinois at Chicago
845 S. Damen Ave., MC 802
Chicago, IL 60612


Availability of questionnaire: needs permission from developer, cost or freely available Use with permission from developer
Limitations Long questionaire; a shorter version, FOSQ-10 is available
Link to the questionnaire (if available) Not available
Other comments Self-administered. FOSQ-10 has similar validity and reliability as the FOSQ with an internal consistency of α = 0.87.
Patient populations in who questionnaire has been validated Adults, Pregnant women
References (including original publication, validity and reliability in different countries/languages, populations and long/short versions)

1. Weaver TE, Laizner AM, Evans LK, et al. An instrument to measure functional status outcomes for disorders of excessive sleepiness. Sleep 1997;20:835-43. 
2.  Ferrer M, Vilagut G, Monasterio C, Montserrat JM, Mayos M, Alonso J. Measurement of the perceived impact of sleep problems: the Spanish version of the functional outcomes sleep questionnaire and the Epworth sleepiness scale]. Med Clin (Barc). 1999 Sep 11;113(7):250-5. 
3. Izci B, Firat H, Ardiç S, Köktürk O, Gelir E, Altinörs M. Adaptation of functional outcomes of sleep questionnaire (FOSQ) to Turkish population. Tuberk Toraks. 2004;52(3):224-30.
4.  Stavem K, Kjelsberg FN, Ruud EA. Reliability and validity of the Norwegian version of the Functional Outcomes of Sleep Questionnaire. Qual Life Res. 2004 Mar;13(2):541-9.
5. Vidal S, Ferrer M, Masuet C, Somoza M, Martínez Ballarín JI, Monasterio C. [Spanish version of the Functional Outcomes of Sleep Questionnaire: scores of healthy individuals and of patients with sleep apnea-hypopnea syndrome]. Arch Bronconeumol. 2007 May;43(5):256-61.
6. Büttner A1, Feier Ch, Galetke W, Rühle K. [A questionnaire to capture the functional effects of daytime drowsiness on quality of life in case of obstructive sleep apnea syndrome. Functional Outcomes of Sleep Questionnaire (FOSQ)]. Pneumologie. 2008 Sep;62(9):548-52.
7. Chasens ER1, Ratcliffe SJ, Weaver TE. Development of the FOSQ-10: a short version of the Functional Outcomes of Sleep Questionnaire. Sleep. 2009 Jul;32(7):915-9.
8. Korpe L1, Lundgren J, Dahlström L.
Psychometric evaluation of a Swedish version of the Functional Outcomes of Sleep Questionnaire, FOSQ. Acta Odontol Scand. 2013 Sep;71(5):1077-84.
9. Billings ME, Rosen CL, Auckley D, Benca R, Foldvary-Schaefer N, Iber C, Zee PC, Redline S, Kapur VK. Psychometric Performance and Responsiveness of the Functional Outcomes of Sleep Questionnaire and Sleep Apnea Quality of Life Instrument in a Randomized Trial: The HomePAP Study. Sleep. 2014 Dec 1;37(12):2017-24..

Updated by Helena Schotland, MD
The last date of update October 2019