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为了解本地区风湿性心脏病(简称风心病)的患病水平,并探讨其危险因素,以便开展人群防治研究,作者采用分层整群随机抽样的方法,按1/10的抽样比例对银川郊区农村6个调查点和老城区12个调查点进行了调查,受检率91.2％。对确诊的风心病患者采用1∶4配对的方法进行了风湿性关节炎等17个危险因素的研究,所选对照与相应的病例的性别、民族、职业、居住区相同,年龄在相差3岁范围内。
In order to understand the prevalence of rheumatic heart disease in this region and to explore its risk factors in order to carry out population control research, the authors used a stratified cluster random sampling method with a ratio of 1/10 to Yinchuan. 6 survey sites in the rural suburbs and 12 survey sites in the old city conducted surveys, and the inspection rate was 91.2%. The rheumatoid arthritis and other 17 risk factors were studied in a 1:4 pairing of patients diagnosed with rheumatic heart disease. The selected controls were the same as the corresponding cases in gender, ethnicity, occupation, and residential area. The age difference was 3 years old. Within range.