Can medical consortiums bridge the gap in health inequity in China? A propensity score matching analysis.

While health is a fundamental right, health inequities between urban and rural residents remain significant in China. Medical consortia aim to bridge this gap by providing equitable and affordable healthcare. However, their effectiveness in enhancing health equity remains underexplored. This study aims to explore whether medical consortia have mitigated health inequity between urban and rural residents. We employed propensity score matching to mitigate selection bias among 9918 electronic medical records. We focused on two key areas: the effectiveness of medical consortia in reducing healthcare burdens and their influence on health equity, as indicated by the disparities in medical expenses between urban and rural residents. To obtain more detailed insights, we segmented medical expenses into low, medium, and high categories for both urban and rural residents and examined how medical consortia differentially affect health equity across these segments. Moreover, we evaluated whether the differences in referral effects on medical expenses between urban and rural residents can be explained by their varying disease structures and age distributions. We found that medical consortia can significantly reduce the medical burden on populations, but have limitations in improving health equity. The findings highlight a substantial reduction in medical expenses for urban populations. However, no significant reduction was observed in rural populations, with the low-medical-expense group experiencing an increased healthcare burden following the implementation of medical consortia. These findings are robust across various matching methods. Despite reducing healthcare burdens, medical consortia have not equalized health outcomes between urban and rural residents. Significant differences in the disease and age structures exist between urban and rural residents, which may account for the differing causal effects observed between them. Policymakers must prioritize health equity in healthcare reform and consider targeted interventions to address the distinct healthcare challenges of different socioeconomic groups.