Sleep Related Questionnaires


Name of questionnaire Self Efficacy in Sleep apnea (SEMSA)
Type of questionnaire-description,age Disease-specific measure of pretreatment expectancies regarding OSA and CPAP treatment in adults. Designed to assess adherence-related cognitions.
Number of items 26-item
Number of domains & categories 3 subscales 
Name of categories/domains   Risk perception, outcome expectancies, and treatment self-efficacy
Scaling of items 1 to 4
Scoring available: with permission or free With permission from developer
Scoring test-retest reliability Yes, r=0.68 for Perceived Risk; 0.77 for Outcome Expectancies; and 0.71 for Treatment Self-Efficacy
Scoring Internal consistency Yes, Cronbach alpha= 0.92
Validity Content validity by a panel of judges
Available forms (short and/or long etc.) N/A
Language English
Translations in other languages (if yes, then list the languages) Yes, Chinese
Developer name TE Weaver,  PhD, FAAN, RN, et al
Developer contact information College of Nursing, University of Illinois at Chicago, 845 South Damen Avenue (M/C 802), Chicago, IL 60612.  teweaver@uic.edu
Availability of questionnaire: needs permission from developer, cost or freely available With permission
Limitations -
Link to the questionnaire (if available) From developer
Other comments Has strong psychometric properties and has the potential for identifying patient perceptions that may indicate those most likely to not adhere to treatment
Patient populations in who questionnaire has been validated Clinic-based patients with OSA
References (including original publication, validity and reliability in different countries/languages, populations and long/short versions) 1.  Weaver TE, Maislin G, Dinges DF, Younger J, Cantor C, McCloskey S, Pack AI. Sleep. 2003 Sep;26(6):727-32. Self-efficacy in sleep apnea: instrument development and patient perceptions of obstructive sleep apnea risk, treatment benefit, and volition to use continuous positive airway pressure.

2.  Lai AY1, Fong DY, Lam JC, Weaver TE, Ip MS.  Sleep Med. 2013 Nov;14(11):1192-8. Linguistic and psychometric validation of the Chinese version of the self-efficacy measures for sleep apnea questionnaire.
Population:  Newly diagnosed OSA and CPAP-naïve
Internal consistency Cronbach alpha > 0.88
Test-retest intraclass correlation coefficient: 0.82 for Perceived Risk; 0.70 for Outcome Expectancies; and 0.72 for Treatment Self-Efficacy
Updated by Ninotchka L. Sigua , MD
The last date of update November 2015