Table 1.
Baseline Demographic and Clinical Characteristics of the Study Groups
| Variable | Non-CI-AKI Group (n=344) | CI-AKI Group (n=71) | χ2/t Value | P value |
|---|---|---|---|---|
Age (year,  ±s) |
62.72±12.90 | 67.03±12.34 | 0.068 | 0.946 |
| Age>75, n (%) | 56(16.27) | 13(18.31) | 0.175 | 0.676 |
| Men, n (%) | 271(78.78) | 53(74.65) | 0.587 | 0.444 |
| Hypertension, n (%) | 144(41.86) | 30(42.25) | 0.004 | 0.951 |
| Diabetes mellitus, n (%) | 94(27.33) | 33(46.48) | 10.166 | 0.001 |
| Smoking, n (%) | 145(42.15) | 28(39.44) | 0.450 | 0.502 |
| Drinking, n (%) | 94(27.33) | 18(25.35) | 0.116 | 0.733 |
Systolic pressure (mmHg,  ±s) |
126.78±20.90 | 127.82±22.56 | −0.375 | 0.708 |
| LVEF< 40%, n (%) | 64(18.60) | 17(23.94) | 1.068 | 0.301 |
Diastolic pressure (mmHg,  ±s) |
78.31±14.22 | 79.61±14.87 | −0.691 | 0.490 |
| Aspirin, n (%) | 344(100) | 71(100) | – | 1 |
| Clopidogrel/Ticagrelor, n (%) | 344(100) | 71(100) | – | 1 |
| Beta-blockers, n (%) | 280(81.40) | 60(84.51) | 0.385 | 0.535 |
| ACEI/ARB, n (%) | 226(65.70) | 51(71.83) | 0.997 | 0.318 |
| CCB, n (%) | 40(11.63) | 6(8.45) | 0.603 | 0.438 |
| Diuretics, n (%) | 86(25.00) | 26(36.62) | 4.033 | 0.045 |
| Statins, n (%) | 319(92.73) | 65(91.55) | 0.119 | 0.730 |
| Nitrates, n (%) | 250(72.67) | 49(69.01) | 0.392 | 0.531 |
| Criminal artery vessels, n (%) | ||||
| Left anterior descending, n (%) | 140(40.70) | 33(46.48) | 0.809 | 0.368 |
| Left circumflex, n (%) | 91(26.45) | 16(22.54) | 0.472 | 0.492 |
| Right coronary artery, n (%) | 107(31.10) | 19(26.76) | 0.525 | 0.469 |
| Left main, n (%) | 6(1.74) | 3(4.23) | 1.708 | 0.191 |
| Stent number per patient, n (%) | ||||
| 1 (n, %) | 303(88.08) | 59(83.10) | 1.312 | 0.252 |
| ≥2 (n, %) | 41(11.92) | 12(16.90) | 1.312 | 0.252 |
| Stent length (mm) | 16.19 ± 3.21 | 16.83 ± 2.74 | −1.730 | 0.086 |
| Stent diameter (mm) | 3.17 ± 0.89 | 3.23 ± 0.77 | 0.551 | 0.582 |
| Contrast exposure time (min) | 37.96±11.26 | 40.23±13.65 | 1.488 | 0.138 |
| Contrast medium>100 (mL) | 182(52.91) | 46(64.79) | 3.356 | 0.067 |
Abbreviations: CI-AKI, contrast-induced acute kidney injury; LVEF, left ventricular ejection fraction; ACEI, angiotensin converting enzyme inhibitor; ARB, angiotensin receptor inhibitor; CCB, calcium channel blockers.