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Table 1 Pre-operative characteristics and type of surgery across the four age strata

From: Association between older age and outcome after cardiac surgery: a population-based cohort study

Variables Age 18–49 (n = 752) Age 50–64 (n = 2500) Age 65–79 (n = 3047) Age ≥80 (n = 544) P value
Age (year) 40.6 ± 8.9 58.5 ± 4.1 72.4 ± 4.3 83.1 ± 2.4 <0.001
Male (%) 71.5% 80.9% 74.7% 73.0% <0.001
Hypertension (%) 42.9% 77.6% 84.3% 86.0% <0.001
Hyperlipidemia (%) 64.5% 94.9% 94.0% 90.9% <0.001
Diabetes (%) 14.9% 33.8% 34.0% 26.1% <0.001
Previous MI (%) 32.3% 50.7% 51.7% 53.8% <0.001
CHF (%) 12.0% 11.7% 17.8% 24.5% <0.001
PVD (%) 2.7% 6.7% 11.6% 11.8% <0.001
Stroke (%) 7.0% 8.9% 16.3% 21.8% <0.001
CRF on dialysis (%) 2.4% 1.3% 1.5% 0.4% 0.028
Malignancy (%) 1.3% 2.0% 5.6% 7.2% <0.001
BMI 29.4 ± 5.8 30.1 ± 5.9 28.8 ± 5.1 26.8 ± 4.5 <0.001
Re-operation (%) 21.5% 6.4% 6.9% 4.5% <0.001
Re-op adult congenital (%) 10.2% 0.3% 0.1% 0.0% <0.001
Pre-op Cr (μmol/L) 108.1 ± 107.1 103.1 ± 79.0 112.1 ± 83.7 109.3 ± 39.5 0.04
Type of Surgery      
CABG 42.0% 73.2% 67.8% 52.4% <0.001
AVR 16.0% 5.0% 4.4% 3.9% <0.001
MVR 15.6% 5.8% 5.3% 4.4% <0.001
Combined surgery 9.8% 12.6% 21.2% 36.3% <0.001
AVR + CABG 1.2% 4.6% 11.1% 24.3% <0.001
MVR + CABG 1.3% 4.1% 5.5% 5.0% <0.001
2 or more valves 7.3% 3.9% 4.6% 7.0% <0.001
PVR/TVR 10.6% 1.0% 0.5% 0.0% <0.001
Others 6.0% 2.3% 0.8% 1.3% <0.001
CPB time (min) 123.0 ± 62.1 115.9 ± 52.4 123.9 ± 55.2 129.6 ± 55.3 <0.001
Cross Clamp time (min) 79.1 ± 54.9 78.7 ± 44.3 85.8 ± 47.9 92.0 ± 48.4 <0.001
off-pump surgery 9.6% 1.3% 0.9% 0.4% <0.001
  1. MI: myocardial infarct; CHF: congestive heart failure; PVD: peripheral vascular disease; ESKD: end stage kidney disease; BMI: body mass index; Cr: creatinine, EF: ejection fraction; CABG: coronary artery bypass grafting; AVR: aortic valve repair/replacement; MVR: mitral valve repair/replacement; PVR: pulmonary valve repair/replacement; TVR: tricuspid valve repair/replacement; CPB: cardiopulmonary bypass.