*Five patients in whom causal contrast media could not be identified were excluded from this analysis among 51 patients with skin test results. Iopromide, iopamidol, iomeprol, iohexol, and iobitridol
CI: confidence intervals; OR: odds ratios. *457 patients were included because the data were not available for 12 patients. Carcinoembryonic antigen (CEA) was excluded because those were not available