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对合肥地区1983~1985年3年中老年前期(45~59岁)及老年期(60岁以上)住院患者共4258例,按出院患者疾病分类
A total of 4258 inpatients from 1983 to 1985 in middle-aged and middle-aged (45-59 years old) and seniors (over 60 years old) in Hefei were classified according to the type of discharged patients