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于1985年3月至1986年11月,在黑龙江地区对241例具有组织学诊断依据胃癌和等数量对照病例(非肿瘤疾病),进行了饮食在胃癌病因中作用的病例对照研究。病例和对照二者性别相同,年龄和居住地点相近,对每一病例和对照进行面对面调查。调查内容包括经济状况、职业、吸烟、饮酒、饮食、饮食习惯和既往疾病史。重点询问发病前饮食情况,平均每
From March 1985 to November 1986, 241 case-control studies of the role of diet in the etiology of gastric cancer were performed in 241 patients with histological diagnosis based on gastric cancer and an equal number of control cases (non-neoplastic disease) in Heilongjiang. Both cases and controls had the same sex, similar age and place of residence, and face-to-face investigations of each case and control. The survey included economic status, occupation, smoking, alcohol consumption, diet, eating habits and past medical history. Inquire about pre-morbid diet, on average