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失访病例对生存率的估计有一定的影响，往往产生偏性估计。正确地评估失访病例的生存率对临床随访研究有着一定的意义。本文对71例肝癌信访失达病例进行了追踪查询，得到了这部分病例的最终结局信息，与同期的296例未失访组病例为对照，对两组间的诊治情况和生存分布情况进行了
Loss of follow-up cases have a certain influence on the estimation of survival rate, and often produce biased estimates. Correctly evaluating the survival rate of lost follow-up cases has certain significance for clinical follow-up studies. In this paper, 71 cases of missed cases of petitions for liver cancer were tracked and inquired. The final outcomes of these cases were obtained. Compared with the 296 cases that were not lost in the same period, the diagnosis and treatment of the two groups and the distribution of survival were performed.