Table 2. Significance of differences between groups^*.

	Proportion of recurrence				Proportion of death
	Group 1	Group 2	Group 3	Group 4	Group 1	Group 2	Group 3	Group 4
Group 1	-	0.175	<0.0001	<0.0001	-	0.031	<0.0001	<0.0001
Group 2	-	-	<0.0001	<0.0001	-	-	0.013	<0.0001
Group 3	-	-	-	0.080	-	-	-	0.057
Group 4	-	-	-	-	-	-	-	-

^*: Log-rank test