Table 3. Number of positive and negative results for cell proliferation and apoptosis biomarkers in different groups of pterygium samples according to age.

Age	PCNA		Caspase-3		mP53
	+	-	+	-	+	-
<70	15	2	8	9	11	6
70–80	9	7	6	10	4	12
p value	0.095		0.579		0.022 *

*p<0.05.