Document Type : Original Article
Authors
1
Department of Occupational Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Rehabilitation Research Center, Iran University of Medical Sciences, Tehran, Iran
2
Department of Occupational Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Neuroscience Research Center, Iran University of Medical Sciences, Tehran, Iran
3
Department of Occupational Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran Rehabilitation Research Center, Iran University of Medical Sciences, Tehran, Iran Geriatric Mental Health Research Center, Iran University of Medical Sciences, Tehran, Iran
4
Department of Regenerative Medicine, Neurology and Multiple Sclerosis Group, Royan Institute for Stem Cell Biology and Technology, Academic Center for Education, Culture and Research, Tehran, Iran
Abstract
Background: Multiple sclerosis (MS) profoundly influences individuals' participation across various life domains. This study evaluated the psychometric properties of the Persian version of the Participation Measure-3 Domains, 4 Dimensions (PM-3D4D) in people with MS (PwMS).
Methods: In a cross-sectional design with a nested test-retest sub-study, 230 PwMS were assessed. Construct validity was examined through intercorrelations among PM-3D4D dimensions and associations with the Community Integration Questionnaire (CIQ), Participation Measure for Post-Acute Care (PM-PAC), Satisfaction with Life Scale (SWLS), and Purpose in Life Test-Short Form (PIL-SF). The instrument's discriminative capacity across subgroups with different levels of disability and fatigue was also analyzed.
Results: The PM-3D4D demonstrated excellent test-retest reliability [intraclass correlation coefficient (ICC)(2,1) = 0.81-0.90] and good internal consistency (Cronbach’s alpha = 0.79-0.89). Strong correlations emerged between the diversity and frequency dimensions (rs = 0.70-0.88), alongside moderate to strong correlations with the difficulty dimension (rs = 0.37-0.82). As hypothesized, PM-3D4D scores correlated strongly with CIQ (rs = 0.71-0.83), and the difficulty dimension was negatively correlated with PM-PAC subscales
(rs = -0.75 to -0.85). Desire for change showed weak negative correlations with SWLS (rs = -0.16 to -0.29) and moderate negative correlations with PIL-SF (rs = -0.33 to -0.51). The instrument significantly differentiated participants based on disability and fatigue levels (P < 0.001).
Conclusion: The Persian version of the PM-3D4D is a valid and reliable measure for evaluating participation among PwMS in both clinical and research settings.
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