摘要：SummaryBackground Approximately 150 million individuals worldwide face catastrophic expenditure each year from medical costs alone, and the non-medical costs of accessing care increase that number. The proportion of this expenditure related to surgery is unknown. Because the World Bank has proposed elimination of medical impoverishment by 2030, the effect of surgical conditions on financial catastrophe should be quantified so that any financial risk protection mechanisms can appropriately incorporate surgery. Methods To estimate the global incidence of catastrophic expenditure due to surgery, we built a stochastic model. The income distribution of each country, the probability of requiring surgery, and the medical and non-medical costs faced for surgery were incorporated. Sensitivity analyses were run to test the robustness of the model. Findings 3·7 billion people (posterior credible interval 3·2–4·2 billion) risk catastrophic expenditure if they need surgery. Each year, 81·3 million people (80·8–81·7 million) worldwide are driven to financial catastrophe—32·8 million (32·4–33·1 million) from the costs of surgery alone and 48·5 million (47·7–49·3) from associated non-medical costs. The burden of catastrophic expenditure is highest in countries of low and middle income; within any country, it falls on the poor. Estimates were sensitive to the definition of catastrophic expenditure and the costs of care. The inequitable burden distribution was robust to model assumptions. Interpretation Half the global population is at risk of financial catastrophe from surgery. Each year, surgical conditions cause 81 million individuals to face catastrophic expenditure, of which less than half is attributable to medical costs. These findings highlight the need for financial risk protection for surgery in health-system design. Funding \{MGS\} received partial funding from NIH/NCI R25CA92203.
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