Details

Autor(en) / Beteiligte

• Xu, Mingyao
• Harel, Daphna
• Carrier, Marie-Eve
• Kwakkenbos, Linda
• Bartlett, Susan J
• Gottesman, Karen
• Guillot, Geneviève
• Hummers, Laura
• Malcarne, Vanessa L
• Richard, Michelle
• Thombs, Brett D

Titel

Differential Item Functioning on the Cochin Hand Function Scale among People with Systemic Sclerosis by Language, Sex, and Disease Subtype: a Scleroderma Patient-centered Intervention Network (SPIN) Cohort Study

Ist Teil von

• Arthritis care & research (2010), 2023-11

Ort / Verlag

United States: Wiley-Blackwell

Erscheinungsjahr

2023

Quelle

Wiley Online Library

Beschreibungen/Notizen

• The Cochin Hand Function Scale (CHFS) is commonly used among people with systemic sclerosis (SSc), including study participants who speak different languages, are of different sexes, or have different disease subtypes. It is not known, however, whether CHFS displays differential item functioning (DIF) and if scores from participants in different groups can be treated equivalently. We evaluated the degree that the CHFS generates scores that are comparable across language, sex, and disease subtype. We included participants enrolled in the Scleroderma Patient-centered Intervention Network (SPIN) Cohort who completed the CHFS at their baseline assessment between April 2014 and September 2020. Confirmatory factor analysis (CFA) was used to test unidimensionality, and Multiple Indicator Multiple Cause (MIMIC) models were used for DIF analysis based on language, sex, and disease subtype. Both intraclass correlation coefficient (ICC) and Pearson's correlation were calculated using factor scores obtained from unadjusted and DIF-adjusted MIMIC models to evaluate agreement and correlation between scores. 2155 participants were included. CFA with covarying error terms supported a good fit of the model (χ2[127] =1754.671, P < 0.001, TLI = 0.985, CFI = 0.987, RMSEA = 0.077). Nine items displayed statistically significant DIF for language of administration, 10 items for sex, and 10 items for disease subtype. However, the overall impact of DIF was negligible when comparing factor scores that did and did not account for DIF (ICC= 0.999, r = 0.999). The CHFS has score comparability in SSc regardless of participants' language, sex, and disease subtype. This article is protected by copyright. All rights reserved.