Table 2

Scoring system used in our study

Staining criteriaScore and criteria for scoring
NA, not applicable.
Staining intensity0 (no staining)1 (weak staining)2 (moderate staining)3 (strong staining)
Uniformity of staining0 (not uniform throughout)1 (uniform throughout)NANA
Specificity of staining0 (non-specific staining present)1 (only specific staining present)NANA
Absence of background staining0 (excessive background staining that interferes with interpretation)1 (background staining present but does not interfere with interpretation)2 (no background staining present)NA
Counterstaining0 (inadequate)1 (adequate)NANA