Table 1 Basic patient characteristics
Characteristics | All (N = 3692) | Group 0 (N = 1228) | Group 1 (N = 1232) | Group 2 (N = 1232) | Overall p value | Patients, n |
|---|---|---|---|---|---|---|
Age, median (IQR) | 73.0 (66.0–77.0) | 72.0 (66.8–77.0) | 72.0 (66.0–77.0) | 73.0 (66.0–78.0) | 0.609 | 3692 |
Sex, female, n (%) | 1351 (36.6) | 444 (36.2) | 455 (36.9) | 452 (36.7) | 0.920 | 3692 |
BMI, median (IQR) | 26.8 (24.0–30.4) | 27.4 (24.7–30.8) | 27.2 (24.2–30.7) | 25.7 (23.0–29.4) | < 0.001 | 2395 |
Type of surgery, n (%) | 0.713 | 3692 | ||||
Coronary artery bypass graft | 1567 (42.4) | 541 (44.1) | 515 (41.8) | 511 (41.5) | ||
Combined | 733 (19.9) | 238 (19.4) | 250 (20.3) | 245 (19.9) | ||
Valve | 1392 (37.7) | 449 (36.6) | 467 (37.9) | 476 (38.6) | ||
Duration of surgery, seconds, median (IQR) | 12,000 (9600–14,700) | 11,700 (9588–14,400) | 12,300 (9900–14,700) | 12,000 (9900–15,000) | 0.002 | 2941 |
Priority of surgery, n (%) | 0.390 | 3692 | ||||
Elective | 2635 (71.4) | 859 (70.0) | 891 (72.3) | 885 (71.8) | ||
Urgent/emergency | 1057 (28.6) | 369 (30.0) | 341 (27.7) | 347 (28.2) | ||
ASA, n (%) | 0.039 | 3692 | ||||
1–2 | 57 (1.54) | 20 (1.63) | 22 (1.79) | 15 (1.22) | ||
3–5 | 3018 (81.7) | 998 (81.3) | 1034 (83.9) | 986 (80.0) | ||
“Missing” | 617 (16.7) | 210 (17.1) | 176 (14.3) | 231 (18.8) | ||
Preexisting medical conditions | ||||||
NYHA ≥ 3, n (%) | 1853 (50.2) | 610 (49.7) | 622 (50.5) | 621 (50.4) | 0.906 | 3692 |
Congestive heart failure, n (%) | 2468 (66.8) | 814 (66.3) | 824 (66.9) | 830 (67.4) | 0.849 | 3692 |
Charlson comorbidity Index, median (IQR) | 6.00 (5.00–8.00) | 6.00 (5.00–8.00) | 6.00 (5.00–8.00) | 6.00 (5.00–8.00) | 0.371 | 3692 |
APACHE II, median (IQR) | 20.0 (15.0–27.0) | 20.0 (15.0–27.0) | 21.0 (15.0–28.0) | 20.0 (15.0–26.0) | 0.351 | 3692 |
Coronary heart disease, n (%) | 2828 (76.6) | 948 (77.2) | 939 (76.2) | 941 (76.4) | 0.827 | 3692 |
Chronic obstructive pulmonary disease, n (%) | 799 (21.6) | 258 (21.0) | 268 (21.8) | 273 (22.2) | 0.782 | 3692 |
Peripheral vascular disease, n (%) | 622 (16.8) | 214 (17.4) | 201 (16.3) | 207 (16.8) | 0.761 | 3692 |
Diabetes, n (%) | 2226 (60.3) | 743 (60.5) | 740 (60.1) | 743 (60.3) | 0.975 | 3692 |
Chronic renal failure, n (%) | 1395 (37.8) | 474 (38.6) | 455 (36.9) | 466 (37.8) | 0.695 | 3692 |