林州市食管癌家族聚集性分析

目的：研究林州市食管癌家族聚集性及遗传因素在食管癌发生中的作用。方法 采用以医院为基础的病例对照研究资料,调查了１１８例食管癌新发病例及１６８例对照的Ⅰ,Ⅱ级亲属食管癌患病情况,比较病例对照各级亲属食管癌发生率。用Ｆａｌｃｏｎｅｒ法计算遗传度。结果 病例及对照亲属食管癌患病率比较表明,血缘关系越近,亲属食管癌发生率越高。Ⅰ、Ⅱ级亲属相对危险度（ＲＲ）分别为３．１５（２．１５￣４．６１）和１．８７（

Study on family aggregation of esophageal cancer in Linzhou city

OBJECTIVE: To investigate family aggregation of esophageal cancer (EC) in Linzhou city, a high risk area for EC. METHODS: A hospital based case-control study were conducted, which included relatives of 118 EC cases and 168 controls. EC incidences in relatives of cases and controls were compared by chi 2 test and risk ratio (RR) was calculated. Heritability (h2) was estimated using the Falconer method. RESULTS: EC incidence of case relatives was significantly higher than that in control relatives. The RR was 3.15 (2.15-4.61) in the first degree relatives and 1.87 (1.26-2.79) in the second degree relatives. The heritability was (53.39 +/- 5.93)% for the first degree relatives and (50.21 +/- 10.75)% for the second degree relatives, while the weighted h2 was (52.26 +/- 3.82)%. CONCLUSION: The genetic factor plays an important role the occurrence of EC in Linzhou city; however, environmental factors should not be ignored.