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肝癌是一种严重危害人类健康的常见肿瘤。对肝癌危险因素的作用国内外作过很多研究。本文通过利用在统一方法下的六个地区的肝癌危险因素的病例对照调查资料进行了联合分析，旨在探讨我国的肝癌危险因素的作用，为防治对策提供科学依据。l材料与方法采用统一的调查方法与质控方
Liver cancer is a common tumor that seriously harms human health. The role of HCC risk factors has been studied at home and abroad. This article used a case-control survey of liver cancer risk factors in six regions under the unified method to conduct a joint analysis to explore the role of risk factors for liver cancer in China and provide scientific evidence for prevention and control strategies. l Materials and methods using a unified survey method and quality control