Mitochondrial uncoupling protein 2 expression in colon cancer and its clinical significance

Table 4 Uncoupling protein 2 expression in different diseases detected by immunohistochemistry

Tissue	n	Negative	Mild	Moderate	Strong	Rate of positive (%)
Normal colon	10	10	0	0	0	0
Hyperplastic polyps	10	9	2	0	0	20
adenoma	20	9	3	6	2	55
Colon cancer	78	10	15	30	22	85.9

Positive cells < 15% in negative control and ≥ 15% positive cells were counted as positive. Staining intensity was classified as negative (0), mildly positive (+1), moderately positive (+2), and strongly positive (+3).