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Abstract Objective To assess the impact of vertical integration (VI) within County-Level Integrated Health Organisations (CIHOs) on the costs of primary care inpatients. Methods This study assessed Xishui, a national pilot county for CIHOs, using inpatient claims data. The treatment group comprised 10,118 inpatients from 5 vertically integrated township health centres (THCs), while the control group consisted of 21,165 inpatients from 19 non-vertically integrated THCs. The periods from July 2020 to December 2021 and January 2022 to December 2022 were defined as pre- and post-policy intervention, respectively. The primary outcome variables were total health expenditures (THS), out-of-pocket (OOP) expenditures, and the proportion of OOP expenditures. Propensity score matching was employed to align inpatient demographics and disease characteristics between the groups, followed by a difference-in-differences analysis to evaluate the outcomes. Findings VI significantly increased THS (β = 0.1337, p 0.05). For the basic medical insurance for urban and rural residents, THS per case (β = 0.1343, p 0.05). The THS per case led by Xishui County People’s Hospital, the leading county medical sub-centre (CMSC), significantly increased (β = 0.1753, p 0.05). Increases in OOP expenditures per case were significant in CMSCs led by the People’s Hospital and the Traditional Chinese Medicine Hospital (β = 0.1782, p |
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