Table 2. The cumulative incidence of contrast induced nephropathy or renal impairment at each time interval and comparison between two groups.

Variables	Control	Sarpogrelate	P value	Effect size (ln OR)
After 12 hr	1/31 (3.2)	2/35 (5.7)	1.000	0.60
After 48 hr	2/31 (6.5)	4/35 (11.4)	0.676	0.63
After 1 mon	5/31 (16.1)	4/35 (11.4)	0.724	−0.40

Data are presented as number (%).

OR = odds ratio.