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Table 1 Clinical characteristics of perioperative patients

From: Elevated free fatty acid level is a risk factor for early postoperative hypoxemia after on-pump coronary artery bypass grafting: association with endothelial activation

  Hypoxemia group Non-hypoxemia group P value
(n = 37) (n = 61)
Preoperative data    
Male, n(%) 86.5 (32) 65.6 (40) 0.033
Age, year 65.54 ± 10.11 59.36 ± 7.97 0.002
BMI 26.45 ± 2.77 23.98 ± 2.92 <0.001
Hypertension, n (%) 54.1 (20) 50.8 (31) NS
Diabetes mellitus, n (%) 24.3 (9) 14.8 (9) NS
Myocardial infarction, n (%) 10.8 (4) 6.6 (4) NS
Cerebral infarction, n (%) 5.4 (2) 8.2 (5) NS
Renal insufficiency, n (%) 10.8 (4) 6.6 (4) NS
Cigarette smoking, n (%) 35.1 (13) 41.0 (25) NS
Statins, n (%) 48.6 (18) 34.4 (21) NS
LVEF, % 56.78 ± 9.99 56.51 ± 8.23 NS
Pulmonary hypertension, n (%) 16.2 (6) 16.4 (10) NS
Serum TC, mmol/l 4.64 ± 1.05 4.14 ± 1.05 0.016
Serum TG, mmol/l 2.27 ± 1.88 2.25 ± 2.13 NS
Operative procedures    
Number of graftings, n 2.70 ± 0.94 2.08 ± 0.726 0.001
CPB time, min 103.73 ± 37.01 79.26 ± 28.10 <0.001
Aortic clamping time, min 64.05 ± 23.31 51.73 ± 64.05 0.01
Fluid balance, ml 2605.81 ± 1235.09 2550.82 ± 771.55 NS
Postoperative data    
Volume of transfusion, ml 729.73 ± 790.52 277.05 ± 382.16 <0.001
Serum TC, mmol/l 2.74 ± 0.061 2.91 ± 0.87 NS
Serum TG, mmol/l 1.48 ± 1.21 1.20 ± 0.69 NS
FFA, mmol/l 0.87 ± 0.28 0.66 ± 0.22 <0.001
Outcome    
Incubation time, hour 24.84 ± 15.52 21.61 ± 15.09 NS
ICU time, day 3.65 ± 2.50 2.59 ± 2.59 0.027
Hospital time, day 19.92 ± 3.28 18.46 ± 7.11 NS
Mortality, n (%) 2.7 (1) 0 (0) NS
  1. NS not significant, BMI body mass index, LVEF left ventricular ejection fraction, CPB cardiopulmonary bypass, TC total cholesterol, TG triglycerides, FFA free fatty acid, ICU intensive care unit