Odds ratios of the risk of CIN under contrast medium 1 relative to medium 0, Odds ratios and confidence intervals are identical to those in Table 4 of [5], p-values differ from those of Fisher’s exact test which are presented in the paper.

Table 2: Odds ratios of the risk of CIN under contrast medium 1 relative to medium 0, Odds ratios and confidence intervals are identical to those in Table 4 of [5], p-values differ from those of Fisher's exact test which are presented in the paper.

Subgroup	Events/patients	OR (95% CI)	p-value
All	66/2722	0.38 (0.22-0.66)	0.0005
CKD = Y CKD = N	41/733 25/1989	0.31 (0.15-0.65) 0.53 (0.23-1.21)	0.0017 0.1301
DM = Y DM = N	26/567 40/2155	0.29 (0.08-0.56) 0.52 (0.27-1.00)	0.0019 0.0511
CKD = Y, DM = Y CKD = Y, DM = N CKD = N, DM = Y CKD = N, DM = N	22/231 19/502 4/336 21/1653	0.20 (0.06-0.60) 0.46 (0.17-1.24) 0.29 (0.03-2.84) 0.59 (0.24-1.43)	0.0043 0.1254 0.2885 0.2414