Table 2.

Differential distribution of H19 and Igf2 methylation status according to ROS levels

Parameters		H19 (%)	Igf2 (%)
Partial and complete methylation	Group 1 (n = 39)	94.9	38.5
	Group 2 (n = 38)	76.3	73.6
	Group 3 (n = 31)	83.9	61.3
	Group 4 (n = 43)	63.4	70.7
P values	1 vs 2	0.09	0.02*
	1 vs 3	0.16	0.14
	1 vs 4	0.000*	0.000*
	2 vs 3	0.14	0.09
	2 vs 4	0.000*	0.09
	3 vs 4	0.000*	0.000*

Group 1: ROS < 20, group 2: 20 ≤ ROS < 40, group 3: 40 ≤ ROS < 60, and group 4: ROS ≥ 60. The Kruskal-Wallis was used for comparison. Pairwise comparisons in KW were reported by “P value/6”