| 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 |
| 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 312.996.7808 312.996.0778 |
| 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 |
| 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. Korpe L1, Lundgren J, Dahlström L. 3. 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. 4. 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. 5. 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. 6. 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. 7. 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. 8. 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. 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 | December 2014 |
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Functional Outcomes of Sleep Questionnaire (FOSQ)
Functional Outcomes of Sleep Questionnaire (FOSQ)
Last Reviewed: June 2016
