Differential item functioning of the SF-12 in a population-based regional joint replacement registry.

ABSTRACT:

Background

Joint replacement, an increasingly common procedure amongst older adults, can substantially improve health-related quality of life (HRQoL). However, differential item functioning (DIF) may affect the accurate interpretation of differences in HRQoL amongst patients with different demographic and health status characteristics but the same underlying (i.e., latent) level of the investigated construct. This study tested for DIF in pre-operative SF-12 physical health (PH) and mental health (MH) sub-scale items amongst patients undergoing total hip arthroplasty (THA) and total knee arthroplasty (TKA).

Methods

Data were from a population-based joint replacement registry from the Canadian province of Manitoba. TKA and THA patients who had surgery between 2009 and 2015 and

SUBMITTER: Yadegari I 

PROVIDER: S-EPMC6604189 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature