在统计分析时,采用百分数趋势检验可以协助了解升、降趋势。如下列表一的资料,它是美国某医院68—71年开展心脏移植手术以来,病人接受心脏移植后,存活一年(及一年以上)和未满一年的人数,并算出各年份的一年(及一年以上)的生存率。根据此表的生存率,要回答有无逐年上升趋势,即使符合X~2检验条件的,进行X~2检验,也只能检验各个 In statistical analysis, the use of percentage trend test can help understand the rise and fall trend. The data in Table 1 below shows that since a heart transplant was performed in a hospital in the United States during the period from 68 to 71, the number of patients surviving one year (and one year or more) and less than one year after receiving a heart transplant and calculating one Year (and more than one year) survival rate. According to the survival rate of this table, to answer whether there is a year-by-year upward trend, even in line with X ~ 2 test conditions, the X ~ 2 test, only test each