采用过程ＣＲＯＳＳＴＡＢＳ的统计方法对放疗后生存１０年以上与５年以下死亡的鼻咽癌病例进行病例对照研究，探索各入选因素与生存的相关性。结果显示：原发病灶类型、经济状况、精神状况、临床分期、颅神经症状、年龄及疗后ＶＣＡ－ＩｇＡ滴度与鼻咽癌的生存有相关性。有争议的性别及病理类型与生存无明显相关。 The CROSSTABS statistical method was used to do a case-control study on the cases of nasopharyngeal carcinoma that survived more than 10 years and died less than 5 years after radiotherapy, and explored the correlation between each factor and survival. The results showed that the primary lesion type, economic status, mental status, clinical stage, cranial nerve symptoms, age and post-treatment VCA-IgA titers were correlated with the survival of nasopharyngeal carcinoma. Controversial gender and pathological type had no significant correlation with survival.