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Table 1 Baseline preoperative characteristics a

From: Preoperative hospital length of stay as a modifiable risk factor for mediastinitis after cardiac surgery

Variable All patients N=6653
Age, years (SD) 66 (10.9)
Male Sex, n (%) 4647 (69.9)
Obesity (BMI > 30 kg/m2), n (%) 461 (6.9)
% EF  
>50%, n (%) 3410 (60.6)
30-50%, n (%) 1499 (26.7)
<30%, n (%) 715 (12.7)
Type of Surgery  
CABG only, n (%) 4319 (64.9)
Combined valve + CABG, n (%) 986 (14.9)
Valve only, n (%) (Heart transplant, congenital, and ventricular assist devices excluded) 1024 (15.4)
Smoking (current/<1 year abstinent), n (%) 85 (1.3)
Diabetes, n (%) 1642 (24.7)
COPD, n (%) 703 (10.6)
CRF, n (%) 644 (9.7)
Mean preoperative creatinine, μmol/L (SD) 111 (73)
Mean eGFR, ml/min/1.73 m2, (SD) 65 (22)
CHF, n (%) 2458 (37.0)
Hypertension, n (%) 4216 (63.4)
Redo surgery, n (%) 499 (7.5)
Left main disease, n (%) 1018 (15.3)
Duration of Preoperative Hospital Stay, median (IQR) 2 (2–3)
Emergency surgery, n (%) 571 (8.6)
Parsonnet score, mean (SD) 18.7 (13.3)
  1. a For definitions please refer to reference 16.
  2. CHF congestive heart failure, COPD chronic obstructive pulmonary disease, CRF chronic renal failure, EF ejection fraction, eGFR estimated glomerular filtration rate, IQR interquartile range, SD standard deviation.