Table 1.
Preoperative characteristics of the study patients
| Characteristic | Overall (n =8,981) | Year | |||
|---|---|---|---|---|---|
|
| |||||
| 2017 (n=2,432) | 2018 (n=2,513) | 2019 (n=2,000) | 2020 (n=2,036) | ||
| Age (yr) | 63.1±24.3 | 62.8±41.8 | 62.7±12.8 | 63.3±12.7 | 63.7±12.5 |
| Male sex | 4,540 (53.2) | 1,274 (52.4) | 1,365 (54.3) | 1,060 (53.0) | 1,130 (55.5) |
| Body mass index >25 kg/m2 | 3,205 (35.7) | 842 (34.7) | 926 (36.9) | 692 (34.6) | 745 (36.7) |
| Body surface area (m2) | 1.67±0.20 | 1.67±0.20 | 1.68±0.20 | 1.67±0.20 | 1.67±0.22 |
| NYHA Fc ≥3 | 2,175 (25.5) | 732 (32.4) | 513 (23.0) | 497 (24.9) | 433 (21.3) |
| Smoking (n=8,963) | 2,484 (27.7) | 656 (27.1) | 732 (29.2) | 502 (25.1) | 594 (29.2) |
| Diabetes mellitus | 1,832 (20.4) | 445 (18.3) | 518 (20.6) | 427 (21.3) | 442 (21.7) |
| Hypertension | 4,323 (48.1) | 1,096 (45.1) | 1,167 (46.5) | 1,001 (50.1) | 1,059 (52.0) |
| CKD (GFR <60 mL/min) | 738 (8.2) | 182 (7.5) | 188 (7.5) | 184 (9.2) | 184 (9.0) |
| CKD requiring hemodialysis | 257 (2.9) | 60 (2.5) | 80 (3.2) | 53 (2.7) | 64 (3.1) |
| Atrial fibrillation | 2,987 (33.3) | 815 (33.5) | 830 (33.0) | 669 (33.5) | 673 (33.1) |
| Pneumonia | 219 (3.0) | 42 (2.6) | 59 (3.6) | 66 (3.3) | 52 (2.6) |
| Dyslipidemia | 2,895 (32.2) | 567 (23.3) | 714 (28.4) | 746 (37.3) | 868 (42.6) |
| Left ventricular dysfunction (LVEF ≤30%) | 231 (2.6) | 62 (2.6) | 59 (2.4) | 55 (2.8) | 55 (2.7) |
| History of cardiac surgery | 1,030 (11.5) | 247 (10.2) | 189 (7.5) | 295 (14.8) | 299 (14.7) |
| Prior myocardial infarction | 263 (2.9) | 72 (3.0) | 82 (3.3) | 55 (2.8) | 54 (2.7) |
| Emergency | 342 (3.8) | 112 (4.6) | 86 (3.4) | 80 (4.0) | 64 (3.1) |
| Infective endocarditis | 608 (6.8) | 167 (6.9) | 165 (6.6) | 136 (6.8) | 140 (6.9) |
| EuroSCORE II (n=6,744) | 3.67±5.50 | 4.42±6.28 | 3.75±5.48 | 3.43±5.34 | 3.37±5.01 |
Values are presented as mean±standard deviation or number (%).
NYHA Fc, New York Hear Association Functional Classification; CKD, chronic kidney disease; GFR, glomerular filtration rate; LVEF, left ventricular ejection fraction.