Shortening patient-reported outcome measures through optimal test assembly: application to the Social Appearance Anxiety Scale in the Scleroderma Patient-centered Intervention Network Cohort

BMJ Open
Daphna HarelSPIN Investigators

Abstract

The Social Appearance Anxiety Scale (SAAS) is a 16-item measure that assesses social anxiety in situations where appearance is evaluated. The objective was to use optimal test assembly (OTA) methods to develop and validate a short-form SAAS based on objective and reproducible criteria. This study was a cross-sectional analysis of baseline data from adults enrolled in the Scleroderma Patient-centered Intervention Network (SPIN) Cohort. Adults in the SPIN Cohort in the present study were enrolled at 28 centres in Canada, the USA and the UK. The SAAS was administered to 926 adults with scleroderma. The SAAS, Brief Fear of Negative Evaluation II (BFNE II), Brief Satisfaction with Appearance Scale (Brief-SWAP), Patient Health Questionnaire-8 (PHQ8) and Social Interaction Anxiety Scale-6 (SIAS-6) were collected, as well as demographic characteristics. OTA methods identified a maximally informative shortened version for each possible form length between 1 and 15 items. The final shortened version was selected based on prespecified criteria for reliability, concurrent validity and statistically equivalent convergent validity with the BFNE II scale. A five-item short version was selected (SAAS-5). The SAAS-5 had a Cronbach's α of 0.95 a...Continue Reading

Citations

May 18, 2020·Quality of Life Research : an International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation·S LiM S M Ip
Oct 23, 2020·Arthritis Care & Research·Ting Yi Jessica Chang, Janet E Pope
Dec 24, 2020·Acta Psychiatrica Scandinavica·Daphna HarelUNKNOWN DEPRESsion Screening Data (DEPRESSD) EPDS Collaboration
Jan 28, 2021·International Journal of Environmental Research and Public Health·Sha LiJanet Yuen Ha Wong

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