Demographic and clinical characteristics of patients who received single or multiple chest tubes during the study period
| Characteristic | Group, no. (%) | p value | |
|---|---|---|---|
| SCT, n = 3045 | MCT, n = 2653 | ||
| Age, yr | 0.004 | ||
| ≥ 80 | 366 (12.0) | 256 (9.6) | |
| 70–79 | 933 (30.6) | 801 (30.2) | |
| 60–69 | 887 (29.1) | 865 (32.6) | |
| < 60 | 859 (28.2) | 731 (27.6) | |
| Female sex | 876 (28.8) | 633 (23.9) | < 0.001 |
| Chronic renal failure | 0.57 | ||
| Creatinine > 176 μol/L | 182 (6.0) | 158 (6.0) | |
| Creatinine 110–176 μol/L | 712 (23.4) | 652 (24.6) | |
| Creatinine < 110 μol/L | 2151 (70.6) | 1843 (69.5) | |
| Diabetes | 1029 (33.8) | 952 (35.9) | 0.10 |
| Ejection fraction ≤ 50% | 872 (28.8) | 746 (28.3) | 0.68 |
| COPD | 478 (15.7) | 431 (16.2) | 0.57 |
| Urgency of the procedure | 0.44 | ||
| Elective | 1420 (46.6) | 1246 (47.0) | |
| In-hospital | 1295 (42.5) | 1095 (41.3) | |
| Urgent/emergent | 330 (10.8) | 312 (11.8) | |
| Type of procedure | < 0.001 | ||
| Isolated CABG | 1669 (54.8) | 1862 (70.2) | |
| Isolated valve | 685 (22.5) | 334 (12.6) | |
| CABG and valve | 344 (11.3) | 252 (9.5) | |
| CABG and/or valve plus other procedure | 347 (11.4) | 205 (7.7) | |
CABG = coronary artery bypass graft; COPD = chronic obstructive pulmonary disease; MCT = multiple chest tubes; SCT = single chest tube.