Evaluating the psychometric properties of the fatigue severity scale using item response theory.

ABSTRACT:

Background

Fatigue is a common daily experience and a symptom of various disorders. While scholars have discussed the use of the Fatigue Severity Scale (FSS) using item response theory (IRT), the characteristics of the Japanese version are not yet examined. This study evaluated the psychometric properties of the FSS using IRT and assessed its reliability and concurrent validity with a general sample in Japan.

Methods and measures

A total of 1,007 Japanese individuals participated in an online survey, with 692 of them providing valid data. Of these, 125 participants partook in a re-test after approximately 18 days and had their longitudinal data analyzed. In addition, the graded response model (GRM) was used to assess the FSS items' characteristics.

Results

The GRM's r

SUBMITTER: Muranaka S 

PROVIDER: S-EPMC10177705 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature