Table 2.

Assessment scale for immunohistologic staining

Intensity		Number		Intensity × number
0	No staining	0	0%	0, 1, 2	Negative
1	Weak	1	Less than 10%	3, 4	Weak
2	Medium	2	10–50%	6, 8	Medium
3	Strong	3	51–80%	9, 12	Strong
		4	More than 80%