Invariance Testing of the Disablement in the Physically Active Scale Short Form-10.

Abstract

INTRODUCTION\nPsychometrically sound instruments are needed to accurately track treatment effectiveness and assess quality of patient care. The Disablement in Physically Active Scale Short Form-10 (DPAS-10) was developed as a more parsimonious version of the DPA Scale to assess disablement in the physically active. Psychometric assessment of the DPAS-10 has not been completed; specifically, scale properties must be assessed in a sample of individuals who only respond to the 10-item scale at multiple time points.\n\n\nOBJECTIVES\nTo assess the psychometric properties of the DPAS-10 using confirmatory factor analysis (CFA) and invariance procedures across multiple time points.\n\n\nMETHODS\nConfirmatory factor analyses and longitudinal invariance tests were conducted.\n\n\nRESULTS\nThe DPAS-10 met contemporary fit index recommendations and demonstrated longitudinal invariance; however, localized fit issues suggest further modification is needed.\n\n\nCONCLUSION\nAdoption of the DPAS-10 into widespread clinical practice and research is not recommended until further psychometric testing and scale modification is performed.