Table 4.

Survival according to combinations of depth, size and grade. High grade = III-IV

Prognostic factor
Deep	Large	High grade	n	Survival	95% CI
0	0	0	18	1.0
+	0	0	22	1.0
0	+	0	15	0.93	1.0–0.81
+	+	0	39	0.97	1.0–0.91
0	0	+	69	0.81	0.91–0.72
+	0	+	56	0.81	0.92–0.70
0	+	+	67	0.67	0.79–0.55
+	+	+	204	0.53	0.60–0.46