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Table 1 Preoperative patients’ baseline clinical data between the two groups

From: Influence of chronic kidney disease on early clinical outcomes after off-pump coronary artery bypass grafting

  Normal Group (n = 924) CKD Group (n = 249) t/Χ2 P
Age (ys) 63.5 ± 9.3 69.8 ± 9.2 9.618 < 0.001†
Female sex 228 (24.7) 117 (47) 47.035 < 0.001†
Hypertension 607 (65.7) 208 (83.5) 29.444 < 0.001†
Diabetes 353 (38.2) 130 (52.2) 15.884 < 0.001†
Stroke 195 (21.1) 71 (28.5) 6.142 0.013†
Hyperlipemia 389 (42.1) 118 (47.4) 2.237 0.135
COPD 25 (2.7) 8 (3.2) 0.185 0.667
AF 40 (4.3) 21 (8.4) 6.704 0.01†
Emergency 18 (1.9) 7 (2.8) 0.701 0.403
Diseased coronary vessels
 Triple 602 (65.1) 155 (62.3) 1.569 0.210
 Left main 33 (3.6) 10 (4.0) 0.110 0.740
 Left main + Triple 217 (23.5) 70 (28.1) 2.246 0.134
 Others (single or two) 72 (7.8) 14 (5.6) 1.359 0.244
 LVEF(%) 61.1 ± 13.2 57.4 ± 13.2 3.579 < 0.001†
 Hemoglobin(g/L) 135.0 ± 15.4 121.9 ± 18.7 10.216 < 0.001†
 Albumin(g/L) 40.1 ± 13.8 37.9 ± 4.2 2.484 0.013†
  1. COPD Chronic obstructive pulmonary disease, AF Atrial fibrillation, LVEF Left ventricular ejection fraction
  2. †Significant difference