Table 2. Scoring system.

Score for staining intensity	Score for proportion intensity
0 = no staining	0 = no staining
1 = weak staining	1 = <1% cell staining
2 = intermediate/ moderate staining	2 = 1–10% cell staining
3 = intense/ strong staining	3 = 11–33% cell staining
	4 = 34–66% cell staining
	5 = 67–100% cell staining