Table 1.

 Ki-67 indices by histological grade

Grade	N		Ultrarapid-Ki67		Control MIB-1	Highest MIB-1
			Observer 1	Observer 2	Observer 1	Observer 2
I	9	Mean	2.69	2.59	3.1	6.92
		SD	2.20	3.00	3.92	3.87
		Median	1.50	1.00	1.05	6.20
		Range	0–6.10	0–9.40	0.30–10.50	0.40–13.00
II	9	Mean	2.41	2.68	1.74	5.47
		SD	1.52	1.55	1.24	3.07
		Median	1.70	2.30	1.35	5.80
		Range	0.90–5.10	1.20–5.3	0.30–3.80	1.30–10.30
III	4	Mean	3.73	5.05	4.78	19.08
		SD	3.05	3.62	5.37	5.22
		Median	3.85	5.40	3.3	19.75
		Range	0.30–6.90	0.30–9.10	0.20–12.30	12.20–24.60
IV	12	Mean	21.92	19.33	18.29	36.71
		SD	13.43	10.89	12.64	10.10
		Median	17.25	17.55	15.65	35.65
		Range	5.90–45.00	7.20–41.20	2.10–40.60	23.20–55.50
Total material	34	Mean	9.52	8.81	8.67	18.48
		SD	12.21	10.31	11.02	15.68
		Median	4.90	5.10	3.55	11.60
		Range	0–45.00	0–41.20	0.20–40.60	0.40–55.50