Coronary artery bypass grafting characteristics
| Characteristics | Sleep apnoea (n=513) | Non-sleep apnoea (n=494) | P value |
| Operation type, n (%) | 0.11 | ||
| On-pump CABG | 502 (97.9) | 472 (95.5) | |
| Off-pump CABG | 10 (1.9) | 21 (4.3) | |
| Hybrid CABG | 1 (0.2) | 1 (0.2) | |
| Number of bypass grafts, n (%) | 0.077 | ||
| 1–2 | 119 (23.2) | 100 (20.2) | |
| 3–4 | 384 (74.9) | 391 (79.1) | |
| 5–6 | 10 (1.9) | 3 (0.6) | |
| Number of venous grafts, n (%) | 0.31 | ||
| 0–1 | 127 (24.8) | 117 (23.7) | |
| 2–3 | 378 (73.7) | 374 (75.7) | |
| 4–5 | 8 (1.6) | 3 (0.6) | |
| LIMA graft, n (%) | 484 (94.3) | 474 (96.0) | 0.24 |
| Non-LIMA arterial grafts, n (%) | 0.76 | ||
| Radial artery or RIMA | 28 (5.5) | 31 (6.3) | |
| Radial artery and RIMA | 7 (1.4) | 5 (1.0) | |
| Concurrent valve operation, n (%) | 44 (8.6) | 25 (5.1) | 0.028 |
| Total operation time (min), median (IQR) | 295 (255–330) | 287 (253–324) | 0.044 |
| Estimated blood loss (mL), median (IQR) | 200 (110–300) | 200 (100–300) | 0.97 |
| Length of stay (days), median (IQR) | 7.5 (6.0–10.0) | 7.0 (6.0–9.0) | 0.00096 |
CABG, coronary artery bypass grafting; LIMA, left internal mammary artery; RIMA, right internal mammary artery.