Table 3.

Serum creatinine levels before and on the second day after coronary angiography and the frequency of poor and good collateral circulation in both groups

Variable	CIN(–) group (n = 171)	CIN(+) group (n = 43)	p value
Cr before CAG, mg/dL	0.82 (0.57–1.45)	0.9 (0.74–1.2)	0.013
Cr on the 2nd day after CAG, mg/dL	0.83 (0.6–1.45)	1.28 (1.15–1.6)	<0.001
Poor CCC	59 (34%)	30 (70%)	<0.001
Good CCC	112 (66%)	13 (30%)

Values are presented as median (range) or n (%). CAG, coronary angiography; CCC, coronary collateral circulation; Cr, creatinine; CIN, contrast-induced nephropathy.