河北省1990年一1992年恶性肿瘤死亡抽样调查工作自1993年5月开始，到1994年7月已全部结束。在对居民死亡医学证明书编码的复核过程中，我们发现有以下几种常见错误：一、新生儿与婴儿混淆基层编码员往往忽视“新生儿”的概念，大干等于28天婴儿仍按新生儿编码，如表1。二、新生 The sample survey of malignant tumor deaths in Hebei Province in 1990-1992 began in May 1993 and ended in July 1994. During the review of the resident death medical certificate code, we found the following common mistakes: First, the newborn and the baby confused grass-roots coders often overlook the concept of “newborns”, big dry equals 28 days of infants still by new students Code, as shown in Table 1. Second, freshmen