Table 1.

Grading of immunohistopositivity according to Barresi et al. [3]

Intensity distribution score (ID) = IS × ASP	0–12
Immunostaining intensity (IS)
Negative	0
Weak	1
Moderate	2
Strong	3
Area of staining positivity (ASP)
< 5%	0
5–25%	1
26–50%	2
51–75%	3
76–100%	4