Exercise:
Freireich compared the remission effects of 6-Mercaptopurine (6-MP) and placebo drug on 21 acute leukemia patients. The results are shown below.
6-MP: 6, 6, 6, 7, 10, 13, 16, 22, 23, 6+, 9+, 10+, 11+, 17+, 19+, 20+, 25+, 32+, 32+, 34+, 35+
Placebo: 1, 1, 2, 2, 3, 4, 4, 5, 5, 8, 8, 8, 8, 11, 11, 12, 12, 15, 17, 22, 23
(Numbers indicate survival period; ‘+’ after the number denotes withdrawal of follow-up)
Analyze using the Logrank test.
