Examination of the Measurement Equivalence of the Functional Assessment in Acute Care MCAT (FAMCAT) Mobility Item Bank Using Differential Item Functioning Analyses.

ABSTRACT:

Objective

To assess differential item functioning (DIF) in an item pool measuring the mobility of hospitalized patients across educational, age, and sex groups.

Design

Measurement evaluation cohort study. Content experts generated DIF hypotheses to guide the interpretation. The graded response item response theory (IRT) model was used. Primary DIF tests were Wald statistics; sensitivity analyses were conducted using the IRT ordinal logistic regression procedure. Magnitude and impact were evaluated by examining group differences in expected item and scale score functions.

Setting

Hospital-based rehabilitation.

Participants

Hospitalized patients (N=2216).

Interventions

Not applicable.

Main outcome measures

A total of 111 self-reported mobility items

SUBMITTER: Teresi JA 

PROVIDER: S-EPMC10243473 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature