中文摘要：

目的：探索不同疾病类患者住院医疗服务需求的经济成本与治疗选择之间的关系。方法：通过计算家庭卫生筹资贡献率划分灾难性卫生支出疾病类型,应用需求函数模型预测常见病和罕见病患者住院需求的弹性系数。结果：罕见病成为灾难性疾病的比例更高;11种常见病和11种罕见病患者住院需求的价格弹性和收入弹性系数的估计值分别为-0.967、1.253和2.354、1.805。结论：我国常见病和罕见病患者的住院医疗服务均属奢侈性服务,罕见病患者的住院医疗服务需求短期呈现吉芬商品需求特点。

英文摘要：

Objective：To explore the relationship between medical care expenses of different inpatients＇ and patients＇treatment choice.Methods：The types of catastrophic diseases were determined by HFC index.The demand elasticities of inpatient medical care of common diseases and rare diseases were estimated by economic model of demand elasticity.Results：Rare diseases are easier to become catastrophic diseases than common diseases.The price and income elasticities of medical care demand of 11 common diseases were -0.967 and 2.354 respectively.The price and income elasticities of medical care demand for of 11 rare diseases were 1.253 and 1.805 respectively.Conclusion：The demands of inpatient medical care of common diseases and rare diseases are both of luxury services.The inpatients＇ demand of rare disease is of Giffen Goods in the short time.