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口服避孕药(OC)是世界上应用最广和最有效的节育措施之一。尽管人们早已认识到OC与深部静脉血栓形成(DVT)有关,但对目前广泛应用的雌激素含量低于50μg的低剂量型OC致DVT的危险性仍知之甚少。为此,应用队列研究方法,在密执安州对此进行了研究。根据医疗补助方案管理信息系统所提供的信息,收集按该方案登记在册的15～44岁妇女1980年至1986年秋的住院诊断、门诊诊断及门诊处方资料,
Oral contraceptives (OCs) are among the most widely used and effective birth control measures in the world. Although it has long been recognized that OC is associated with deep venous thrombosis (DVT), the risk of DVT in low dose OCs with widely used estrogen levels below 50 μg is still poorly understood. To this end, the application of research methods in the queue, in the state of Michigan conducted a study. According to the information provided by the Medicaid Management Information System, information on inpatient diagnosis, outpatient diagnosis and outpatient prescriptions of women aged 15-44 registered under the program during the period from 1980 to 1986 was collected.