北京市城区中老年人髋部骨折的病例对照研究

目的 探索北京市中老年人髋部骨髂发生的危险因素，为今后开展髋部骨折的病因学研究提供线索。方法对北京市城区２０１例５０岁以上髋部骨折病例和４０２名对照进行了１：２配比的病例对照研究。结果 与髋部骨折危险性增另有关的危险因素有低钙饮食、３０年前不上立活动、未服用钙剂、体质指数低目前不经常体育锻炼、未曾在农村居住、工作性质为脑力劳动、髋部骨折阳性家族史和糖尿病。对于女性，绝经提前和哺乳时间和时间短也是髋

A case-control study on risk factors for hip fracture in the middle-aged and elderly in Beijing

Objective To investigate the risk factors for hip fracture in women and men aged 50 years and older. Methods A matched case-control study was carried out in the urban area of Beijing from Jan.1994 to May 1996. A total number of 201 cases having had hip fracture were identified by X-ray films in four hospitals of Beijing. Four hundred and two neighbourhood controls were individually matched with these cases by age and sex. Data were analyzed by statistical technique of Chi square test and conditional logistic regression. Results In a multiple conditional logistic regression model, low dietary calcium intake, previous history of more sedantary position ,lack of calcium supplement, low body mass index, current low physical exercise, never living in rural, sedentary position at work,previous fractures of any type after the age of 50, history of family hip fracture and diabetes mellitus were significantly associated with increased risk of hip fracture. In addition,hip fracture was related to the age of menopause and duration of breastfeeding in women,as well as body height in men. Conclusion Hip fracture is a disease with multiple risk factors which are different with sex.