10.3390/polym8030084

Vollständiger Abstract

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<b>Background/Objectives:</b> Structural inequalities in access to healthcare persist even within systems that have achieved near-universal coverage, reflecting the enduring influence of social determinants of health on service utilization. This study examines horizontal inequity in rehabilitation and specialist care in Türkiye and investigates whether access inequality mediates the well-documented income-depression gradient. <b>Methods:</b> Analyzing the nationally representative 2022 Türkiye Health Survey (adults aged ≥15; N = 22,742), we employed Latent Profile Analysis (LPA) to construct people-centered, multidimensional bodily burden profiles, and assessed need-adjusted access using survey-weighted logistic regression, Erreygers-corrected concentration-index decomposition, Multilevel Analysis of Individual Heterogeneity and Discriminatory Accuracy (MAIHDA), and restricted cubic splines, with measurement-invariance and classification-uncertainty sensitivity analyses. Statistical mediation was examined with natural-effect models and E-value sensitivity analysis. <b>Results:</b> Although the system demonstrated responsiveness to need-78.8% of the highest-burden profile accessed specialist services-only 13.7% of this same group reached dedicated physiotherapy or rehabilitation, revealing a profound structural bottleneck in care coordination for marginalized populations with the greatest functional impairment. A persistent pro-rich gradient was confirmed by an Erreygers-corrected concentration index of 0.058 (95% CI 0.043-0.072), driven additively by income and education. Access did not mediate the income-depression pathway (natural indirect effect OR 1.001, 95% CI 1.0003-1.002). <b>Conclusions:</b> The mental health burden of low income operates through pathways that equitable healthcare access alone cannot address. These findings call for macroeconomic and people-centered health system reforms-including direct physiotherapy access, transportation subsidies, and social protection interventions-to advance health equity in rehabilitation utilization.

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