Psychometric properties of a new treatment expectation scale in rheumatoid arthritis: an application of item response theory.

ABSTRACT:

Background

Patient-generated health outcome measures are important in the assessment of long-term treatment goals for Rheumatoid Arthritis (RA), but few psychometrically sound measures are available. The MAPLe-RA (Measuring Actual Patient-Led expectations in RA) is a new questionnaire and its psychometric properties are not investigated. This study aims to examine these properties for each of the items using Item Response Theory (IRT) .

Methods

Participants were included if they completed the scale (MAPLe-RA). A one parameter (Rasch) model and a two parameter logistic (2PL) model were applied to these data using M-plus software.

Results

One hundred thirty-eight patients with RA were included in the analysis. MAPLe-RA scale comprised of 21 items, the mean score was 71

SUBMITTER: Ibrahim F 

PROVIDER: S-EPMC4559926 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature