A total of 13,127 consecutive patients undergoing coronary angiography with complete data were grouped by age and gender into four age categories (<50, 51-64, 65-79 and >80 years). Rates of postcatheterization contrast-induced acute kidney injury were higher for women compared with men in the 65-79 years (14.5 vs 11.0%; p < 0.001) and over 80 years (18.7 vs 15.1%, p = 0.048) age groups.