Table 1:
Preoperative data of CABG patients by postoperative atrial fibrillation
| Preoperative variable | Total n = 7115 | POAF n = 2270 (32%) | Univariate |
Multivariate |
||
|---|---|---|---|---|---|---|
| n (%)a | n (%)b | OR | 95% CI | OR | 95% CI | |
| Age (years) | ||||||
| ≤50 | 315 (4.4) | 34 (11) | Ref. | – | Ref. | – |
| 51–60 | 1358 (19) | 271 (20) | 2.0 | 1.4–3.0 | 2.0 | 1.4–3.0 |
| 61–70 | 2622 (37) | 819 (31) | 3.7 | 2.6–5.3 | 3.8 | 2.6–5.4 |
| 71–80 | 2598 (37) | 1040 (40) | 5.4 | 3.7–7.8 | 5.5 | 3.8–8.0 |
| >80 | 222 (3.1) | 106 (48) | 7.4 | 4.7–11.5 | 7.3 | 4.7–11.4 |
| Male gender | 5496 (77) | 1783 (32) | 1.1 | 1.0–1.3 | 1.2 | 1.1–1.4 |
| Current smoker | 833 (12) | 195 (23) | 1.1 | 1.0–1.2 | 1.1 | 1.0–1.3 |
| Prior MI | 3795 (54) | 1270 (34) | 1.2 | 1.1–1.3 | 1.1 | 1.0–1.2 |
| Hypertension | 3623 (51) | 1179 (33) | 1.1 | 1.0–1.2 | – | – |
| Diabetes | 1518 (21) | 473 (31) | 1.1 | 0.8–1.1 | – | – |
| Hyperlipidemia | 3822 (54) | 1141 (30) | 0.8 | 0.7–0.9 | 0.9 | 0.8–1.0 |
| S-creatinine ≥150 µmol/l | 227 (3.2) | 98 (43) | 1.6 | 1.3–2.1 | 1.6 | 1.2–2.1 |
| NYHA class | ||||||
| I/II | 684 (9.6) | 183 (27) | Ref. | – | Ref. | – |
| IIIA | 2806 (39) | 877 (31) | 1.3 | 1.1–1.6c | 1.2 | 1.0–1.4c |
| IIIB | 2977 (42) | 986 (33) | 1.4 | – | – | – |
| IV | 646 (9.1) | 223 (35) | 1.4 | – | – | – |
| LVEF | ||||||
| Good (>50%) | 4899 (69) | 1548 (32) | Ref. | – | – | – |
| Reduced (30–50%) | 1894 (27) | 612 (32) | 1.0 | 0.9–1.2 | – | – |
| Poor (<30%) | 322 (4.5) | 110 (34) | 1.1 | 0.9–1.4 | – | – |
| Unstable angina | 2336 (33) | 795 (34) | 1.2 | 1.0–1.3 | – | – |
| CCS class | ||||||
| 0 | 152 (2.1) | 42 (28) | 0.8 | 0.6–1.2 | – | – |
| 1 | 425 (6.0) | 126 (30) | 1.0 | 0.8–1.2 | – | – |
| 2 | 1780 (25) | 542 (30) | Ref. | – | – | – |
| 3 | 3768 (53) | 1225 (33) | 1.0 | 0.9–1.2 | – | – |
| 4 | 951 (13) | 328 (34) | 1.1 | 0.9–1.3 | – | – |
| Number of diseased vessels | ||||||
| 1 | 329 (4.6) | 97 (29) | Ref. | – | – | – |
| 2 | 1460 (21) | 455 (31) | 1.1 | 0.8–1.4 | – | – |
| 3 | 5326 (75) | 1718 (32) | 1.1 | 0.9–1.5 | – | – |
| Left main stem stenosis | 2342 (33) | 771 (33) | 1.1 | 1.0–1.2 | – | – |
| Priority of surgery | ||||||
| Elective | 5870 (83) | 1850 (32) | Ref. | – | – | – |
| Urgent | 955 (13) | 317 (33) | 1.1 | 0.9–1.2 | – | – |
| Emergency | 290 (4.1) | 103 (36) | 1.2 | 0.9–1.5 | – | – |
| Haemodynamically unstable | 180 (2.5) | 71 (40) | 1.4 | 1.0–1.9 | – | – |
aPercentage of patients.
bPercentage with POAF. cNYHA class III/IV.
CABG: coronary artery bypass grafting; CCS: Canadian Cardiovascular Society; CI: confidence interval; LVEF: left ventricular ejection fraction; MI: myocardial infarction; NYHA: New York Heart Association; OR: odds ratio; POAF: postoperative atrial fibrillation.