Identifying meaningful change on PROMIS short forms in cancer patients: a comparison of item response theory and classic test theory frameworks.

ABSTRACT:

Background

This study compares classical test theory and item response theory frameworks to determine reliable change. Reliable change followed by anchoring to the change in categorically distinct responses on a criterion measure is a useful method to detect meaningful change on a target measure.

Methods

Adult cancer patients were recruited from five cancer centers. Baseline and follow-up assessments at 6 weeks were administered. We investigated short forms derived from PROMIS® item banks on anxiety, depression, fatigue, pain intensity, pain interference, and sleep disturbance. We detected reliable change using reliable change index (RCI). We derived the T-scores corresponding to the RCI calculated under IRT and CTT frameworks using PROMIS® short forms. For changes that were

SUBMITTER: Lee MK 

PROVIDER: S-EPMC10123030 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature