了解重庆市老年住院患者的疾病构成和住院费用等情况，为当地制定相关政策提供依据。

在重庆市卫生统计决策支持系统病案首页筛选并提取2017-2020年期间能识别疾病编码（ICD-10标准）的8 586 023例老年住院患者的病例资料，根据疾病编码统计其疾病构成和住院费用情况。各单项费用采用灰色关联度分析，平均住院日与均次住院费用的关系采用Spearman秩相关分析。

2017-2020年重庆市老年住院患者占全市住院患者的42.5%，4年期间前三类疾病均为循环系统疾病、呼吸系统疾病、消化系统疾病，住院均次费用逐年上升，单项费用灰色关联度从高到低依次为药费、治疗费、化验费、卫生材料费、检查费、手术费、护理费。平均住院日与均次总费用呈显著正相关（Z=0.152，P<0.01）。

导致重庆市老年人住院的主要原因为慢性疾病，住院均次总费用仍不低，临床诊治方案还需更合理，以期切实降低患者医疗负担。

To understand the disease composition and hospitalization expenses of elderly inpatients in Chongqing, and provide basis for local policy formulation.

The data of 8 586 023 elderly inpatients who can identify the disease code (ICD-10 standard) from 2017 to 2020 were screened and extracted from the front page of medical records of Chongqing health statistics decision support system. The disease composition and hospitalization expenses were counted according to the disease code. Each individual expenses was analyzed by grey correlation degree, and the relationship between average length of stay and average hospitalization expenses was analyzed by Spearman rank correlation.

From 2017 to 2020, the hospitalized patients over 60 years old accounted for 42.5% of the hospitalized patients in the city. During the four-year period, the first three kinds of diseases were circulatory system diseases, respiratory system diseases and digestive system diseases, and the average hospitalization expenses increased year by year. The grey correlation degree of individual expenses from high to low was medicine expenses, treatment expenses, laboratory expenses, health materials expenses, examination expenses, operation expenses and nursing expenses. The average length of stay was positively correlated with average hospitalization expenses (Z=0.152, P < 0.01).

the main cause of hospitalization of the elderly in Chongqing is chronic diseases. The average hospitalization expenses is still not low, and the clinical diagnosis and treatment plan needs to be more reasonable in order to effectively reduce the medical burden of patients.