Table 3. Kaplan Meier Survival analysis: Ki67 labeling index and 3 years and 5 years survival analysis of oral squamous cell carcinoma.

Survival	Ki67 labeling index	N	Deaths (N)	Survived (N)	Log Rank (Mantel-Cox)	Breslow (Generalized Wilcoxon)	Tarone-Ware
3 years disease free survival (n=217)	Low (≤45)	80	3	77 (96.2%)	Chi-Square = 55.72; P<0.001	Chi-Square = 53.86; P<0.001	Chi-Square = 54.93; P<0.001
	Moderate (46 to 60)	84	33	51 (60.7%)
	High (≥61)	53	33	20 (37.7%)
	Overall	217	69	148 (68.2%)
5 years disease free survival (n=150)	Low (≤45)	45	3	42 (93.3%)	Chi-Square = 44.94; P<0.001	Chi-Square = 41.38; P<0.001	Chi-Square = 43.38; P<0.001
	Moderate (46 to 60)	62	33	29 (46.8%)
	High (≥61)	43	33	10 (23.3%)
	Overall	150	69	81 (54.0%)