Item Response Theory Analysis: PROMIS® Anxiety Form and Generalized Anxiety Disorder Scale.

ABSTRACT: Little research has compared item functioning of the Patient-Reported Outcomes Measurement Information System (PROMIS^®) anxiety short form 6a and the generalized anxiety disorder 7-item scale using item response theory models. This was a secondary analysis of self-reported assessments from 67 at-risk U.S. military veterans. The two measures performed comparably well with data fitting adequately to models, acceptable item discriminations, and item and test information curves being unimodal and symmetric. The PROMIS^® anxiety short form 6a performed better in that item difficulty estimates had a wider range and distributed more evenly and all response categories had less floor effect, while the third category in most items of the generalized anxiety disorder 7-item scale

SUBMITTER: Liu W 

PROVIDER: S-EPMC8595462 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature