Table 2.

Allred scoring [18–20]

Proportion of positive staining score (PS)		Staining intensity score (IS)
PS	Range (%)	IS	Type
0	0	0	No staining
1	< 1	1 +	Weak positive staining
2	1–10	2 +	Moderate positive staining
3	11–33	3 +	Strong positive staining
4	34–66	Allred score = PS + IS 0–2: negative; 3–8: positive
5	67–100