Poly(A)-specific ribonuclease protein promotes the proliferation, invasion and migration of esophageal cancer cells

Table 5 Immunohistochemistry scoring criteria

Score type	Score point	Score
Positive cell score	No positive signal	0 (negative)
	0% < the proportion of positive cells < 25%	1
	25% ≤ the proportion of positive cells < 50%	2
	50% ≤ the proportion of positive cells < 75%	3
	75% ≤ the proportion of positive cells	4
Staining intensity score (the staining intensity of cytoplasm, membrane or nucleus)	No signal color	0 (negative)
	Pale yellow	1
	Brown yellow	2
	Dark brown	3

The positive cell score × staining color intensity score was used to judge the immunohistochemistry results, and the higher the score, the higher the antibody expression (score 0: Negative, score 1-4: Positive, score 5-8: Positive ++, score 9-12: Positive +++).