<qa>  What is the 5 significance level of the LT change group?Sample size for hypothesis 2B: A sample size of 242 is required to detect a difference in one year mortality rates of 15 30 versus 15 between the two LT change groups no change deteriorate using a chi squared test at the 5 significance level with 80 power. This is assuming that there are equal numbers of patients in both groups. 