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Table 1 Baseline clinical characteristic of patients with and without CIN

From: The predictive value of the renal resistive index for contrast-induced nephropathy in patients with acute coronary syndrome

Variable CIN (+)
n = 31
CIN (−)
n = 115
P value
Women 9 (29) 22 (19.1) 0.232*
Age (years) 57.1 ± 14.2 56.4 ± 12.0 0.770
BMI (kg/m2) 24.5 ± 4.6 24.5 ± 3.7 0.975
Smoking, n (%) 12 (38.7) 34 (29.6) 0.331
Hypertension, n (%) 12 (38.7) 58 (50.4) 0.246*
Diabetes mellitus, n (%) 7 (22.6) 38 (33.0) 0.263*
Hyperlipidaemia, n (%) 19 (61.3) 55 (47.8) 0.183*
Hyperuricemia, n (%) 12 (38.7) 21 (18.3) 0.016*
CKD, n (%) 8 (25.8) 10 (8.7) 0.010*
Pre-procedure SCr (μmol/L) 98.7 ± 39.8 86.0 ± 37.7 0.101
Pre-procedure eGFR (ml/min/1.73m2) 81.3 ± 32.6 93.1 ± 27.5 0.045
 < 30 n (%) 2 (6.5) 2 (1.7)  
 ≥30, < 60 n (%) 6 (19.4) 9 (7.8)  
 ≥60 n (%) 23 (74.2) 104 (90.4)  
 CHF n (%) 5 (16.1) 24 (20.9) 0.557*
Hypotension, n (%) 0 (0) 6 (5.2) 0.194*
LVEF(%) 50.0 ± 9.0 53.9 ± 10.0 0.053
Diagnosis, n (%)    0.615*
 UA 5 (16.1) 26 (22.6)  
 NSTEMI 10 (32.3) 40 (34.8)  
 STEMI 16 (51.6) 49 (42.6)  
 Diseased vessels 2.0 ± 1.0 2.1 ± 0.8 0.492
 MVD, n (%) 12 (38.7) 44 (38.3) 0.964*
 LAD target vessel, n (%) 18 (58.1) 45 (39.1) 0.059*
 Contrast volume (mL) 124 ± 43 121 ± 32 0.686
 Contrast volume/kg (mL/kg) 1.9 ± 0.8 1.8 ± 0.6 0.650
 24 h hydration volume (mL) 2180 ± 681 1868 ± 701 0.029
 Haemoglobin (g/L) 135.1 ± 20.7 132.7 ± 19.4 0.548
 Homocysteinemia (μmol/L) 17.3 ± 4.8 13.3 ± 3.7 0.000
 SBP pre-procedure (mmHg) 133 ± 16.5 126 ± 21.6 0.116
 DBP pre-procedure (mmHg) 81.3 ± 11.7 80.0 ± 15.4 0.671
  1. *using the Pearson Chi-Square test
  2. BMI Body mass index, CKD Chronic kidney diseases, UA Unstable angina, NSTEMI Non-ST segment elevated myocardial infarction, STEMI ST segment elevated myocardial infarction, CHF Congestive heart failure, LAD Left anterior descending artery, LVEF Left ventricular ejection fraction, MVD Multi-vessel disease, SBP Systolic blood pressure, DBP Diastolic blood pressure, SCr Serum creatinine, eGFR Estimated glomerular filtration rat