| 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 subscales |
| Name of categories/domains |
Activity level, vigilance, intimacy and sexual relationships, general productivity, social outcome |
| Scaling of items |
4 to 6-point scale for each item; total score equals the mean scores for each subscale multiplied by the number of subscales answered (total score range 5-20, with higher scores indicating better functional status)
|
| 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, Iranian, Chinese Mandarin |
| Developer(s) name |
Terri Weaver, PhD, RN, FAAN |
| Developer contact information for permission |
College of Nursing, Department of Biobehavioral Nursing Science and College of Medicine
University of Illinois at Chicago
845 South Damen Ave. MC 802, Chicago, IL, 60612, USA.
teweaver@uic.edu
|
| 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, patients with obstructive sleep apnea |
| References (including original publication, validity and reliability in different countries/languages, populations and long/short versions) |
- Weaver TE, Laizner AM, Evans LK, et al. An instrument to measure functional status outcomes for disorders of excessive sleepiness. 1997;20:835-43.
- Chasens ER, Ratcliffe SJ, Weaver TE. Development of the FOSQ-10: a short version of the Functional Outcomes of Sleep Questionnaire. 2009 Jul;32(7):915-9.
- 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.
- 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.
- 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.
Arch Bronconeumol. 2007 May;43(5):256-61.
- Korpe L, 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.
- Rahavi-Ezabadi S, Amali A, Sadeghniiat-Haghighi K, et al. Adaptation of the 10-Item Functional Outcomes of Sleep Questionnaire to Iranian Patients with Obstructive Sleep Apnea. Qual Life Res. 2016 Feb;25(2):337-341.
- Tsai S, Shun S, Lee P, et al. Validation of the Chinese Version of the Functional Outcomes of Sleep Questionnaire-10 in Pregnant Women. Res Nurs Health. 2016 Dec;39(6):463-471.
- Ray de Castro J, Rosales-Mayor E, Weaver TE. Reliability and Validity of the Functional Outcomes of Sleep Questionnaire - Spanish Short Version (FOSQ-10SV) in Peruvian Patients With Obstructive Sleep Apnea. J Clin Sleep Med. 2018 Apr 15;14(4):615-621.
- 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. 2014 Dec 1;37(12):2017-24.
- Fitzpatrick J, Kerns ES, Kim ED, et al. Functional outcomes of sleep predict cardiovascular intermediary outcomes and all-cause mortality in patients on incident hemodialysis. J Clin Sleep Med. 2021 Aug 1;17(8):1707-1715.
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| Updated by |
Melissa Maloney, MD |
| The last date of update |
February 2023 |
