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Table 1. Pre-operative characteristics in young and old groups
Variable Young (n=613) Old (n=94) p value
Mean age (years) 66.4 ± 9.8 82.9 ± 2.7 <0.001
Male (n) 509 (83.0%) 61 (64.9%) <0.001
Body surface area (m2) 1.70 ± 0.18 1.55 ± 0.14 <0.001
Body mass index (kg/m2) 24.1 ± 3.5 22.5 ± 2.5 <0.001
EuroScore II 2.9 ± 4.4 5.9 ± 6.0 <0.001
Clinical Frailty Scale 2.8 ± 0.7 3.2 ± 0.9 <0.001
Emergent (n) 71 (11.6%) 14 (14.9%) 0.358
Pre-operative IABP (n) 85 (13.9%) 13 (13.9%) 0.988
Pre-operative intubation (n) 2 (0.4%) 0 (0%) 0.765
Hypertension (n) 404 (65.9%) 64 (68.1%) 0.677
Dyslipidaemia (n) 455 (74.2%) 60 (63.8%) 0.051
Diabetes (n) 326 (58.1%) 38 (40.4%) 0.021
Prior cerebrovascular disease (n) 34 (5.5%) 2 (2.1%) 0.160
Peripheral artery disease (n) 105 (17.1%) 24 (25.5%) 0.050
Prior cardiac surgery 11 (2.2%) 3 (3.2%) 0.365
Prior percutaneous coronary intervention 149 (24.3%) 18 (26.6%) 0.631
Old myocardial infarction 134 (21.9%) 20 (21.3%) 0.899
COPD (n) 111 (18.1%) 24 (25.5%) 0.088
Smoking history(n) 410 (66.9%) 50 (53.2%) 0.010
Hemodialysis (n) 89 (14.5%) 8 (8.5%) 0.115
eGFR (mL/min/1.73 m2) 54.5 ± 25.2 50.2 ± 20.5