Table 1 Patient characteristics
Group L | Group N | Group H | Number | |
|---|---|---|---|---|
N = 499 | N = 3,064 | N = 914 | ||
Basic data | ||||
Age, years | 71.0* (64.0–75.0) | 69.0 (61.0–75.0) | 69.0 (61.0–75.0) | 4,477 |
Sex: Female | 149 (29.9%) | 862 (28.1%) | 264 (28.9%) | 4,477 |
Body mass index | 27.4 (24.5–30.6) | 27.0 (24.4–30.4) | 26.4* (23.7–29.6) | 3,202 |
Surgery | ||||
Type of surgery | * | * | 4,477 | |
CABG | 290 (58.1%) | 1821 (59.4%) | 441 (48.2%) | |
Valves | 129 (25.9%) | 891 (29.1%) | 367 (40.2%) | |
Both | 80 (16.0%) | 352 (11.5%) | 106 (11.6%) | |
Duration of anesthesia, minutes | 290 (245–335) | 290 (240–335) | 285 (235–330) | 3,344 |
Duration of surgery, minutes | 202 (165–245) | 200 (160–240) | 190 (155–240) | 3,594 |
Pre-op risk assessment (ACEF) | 1.28 (1.14–1.54) | 1.27 (1.12–154) | 1.43* (1.20–1.98) | 2,377 |
Scores on ICU admission | ||||
APACHE II | 18.0 (14.0–24.0) | 18.0 (14.0–24.0) | 19.0* (14.0–25.0) | 4,008 |
TISS28 | 36.0 (33.0–39.0) | 36.0 (33.0–39.0) | 36.0* (33.0–40.0) | 4,456 |
Pre-existing medical conditions | ||||
Coronary heart disease | 407 (81.6%) | 2392 (78.1%) | 662* (72.4%) | 4,477 |
COPD | 79 (15.8%) | 526 (17.2%) | 172 (18.8%) | 4,477 |
Diabetes mellitus | 208 (41.7%) | 1,205 (39.3%) | 369 (40.4%) | 4,477 |
Peripheral vascular disease | 97 (19.4%) | 611 (19.9%) | 197 (21.6%) | 4,477 |
Atrial fibrillation | 151 (30.3%) | 859 (28.0%) | 326* (35.7%) | 4,477 |
Chronic renal insufficiency | 118 (23.6%) | 696 (22.7%) | 309* (33.8%) | 4,477 |