Table IV.

Comparison of the 5-year DFS and OS by Ki67 expression (%).

	N	+	++	+++	++++	Breslow	P-value
DFS	1,090	86.3	79.6	57.2	36.1	164.66	<0.001
OS	1,090	91.6	83.9	60.7	40.1	166.79	<0.001
χ2		0.202	0.098	0.136	0.211
P-value		0.653	0.755	0.713	0.646

DFS, disease-free survival; OS, overall survival. Data are expressed as a percentage (%).