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Table 1 Demographic data and surgical procedures

From: Acute kidney injury in septua- and octogenarians after cardiac surgery

Variable Septuagenarians
(n = 299)
Octogenarians
(n = 299)
p-value
Age [years] 74 ± 2.8 82 ± 2.1 < 0.001
Female [%] 46 46 1.00
Body mass index [kg × m-2]B 28 (25; 31) 26 (24; 28) < 0.001
COPD [%] 8.7 8.4 0.89
Atrial fibrillation [%] 13.4 14.4 0.81
Insulin-dependent diabetes [%] 11 8.4 0.33
Ejection fraction [%] 61 ± 13 59 ± 13 0.34
Logistic EuroSCORE [%]A 8.5 (7.7 to 9.4) 13.2 (12.1 to 14.4) < 0.001
Recent myocardial infarction [%] 24.1 28.4 0.27
Serum creatinine on admission [mg/dL]B 1 (0.8; 1.2) 1.1 (0.9; 1.3) 0.05
eGFR < 60 ml × min-1 × 1.73 m-2 [%] 34.4 44.0 0.02
Active smoker [%] 6.4 1.6 0.006
Previous cardiac surgery [%] 7.9 7.9 1.00
Isolated bypass surgery [%] 41.1 41.1 1.00
Isolated valve surgery [%] 33.1 33.1 1.00
Combined valve and bypass surgery [%] 25.8 25.8 1.00
  1. A - Shown with 95% confidence interval
  2. B - Data shown as median with interquartile range