Methods a case control study with 100 cases of CHD and 100 pair matched controls was conducted with occupational stress factor scales and multivariate analysis.
方法应用职业紧张因素测试表，对100例冠心病患者1∶1配对病例对照进行多因素分析。
Methods: A pair-matched case-control study was conducted with data on the sampling survey of HBP in Binjiang Hospitol from 1994 to 1996.
方法：利用天津市滨江医院内科门诊高血压抽样调查资料进行病例对照研究。
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