Table 2:
Univariate comparison between patients with and without postoperative atrial fibrillation
| No AF (n = 646) | AF (n = 159) | Odds ratio (95% CI) | P | |
|---|---|---|---|---|
| Age, year | 67.7 ± 9.8 | 70.6 ± 10.2 | 1.38 (1.13–1.64) | 0.01 |
| Male gender | 516 (79.9) | 126 (79.2) | 0.92 (0.60–1.41) | 0.84 |
| Body mass index, kg m2 | 23.3 ± 3.1 | 23.5 ± 3.7 | 1.01 (0.95–1.06) | 0.45 |
| Obesity (body mass index ≥ 25) | 195 (30.2) | 50 (31.4) | 1.06 (0.73–1.54) | 0.76 |
| Diabetes mellitus | 352 (54.5) | 54 (34.0) | 0.43 (0.30–0.61) | 0.01 |
| Hematocrit, % | 37 ± 6 | 38 ± 5 | 1.01 (0.98–1.05) | 0.59 |
| Logistic EuroSCORE | 3.5 [1.9–6.1] | 3.9 [2.0–6.9] | 1.02 (0.96–1.05) | 0.54 |
| Smoking | 366 (56.7) | 75 (47.2) | 0.73 (0.51–0.95) | 0.02 |
| Chronic kidney disease | 375 (58.0) | 84 (52.8) | 0.85 (0.68–1.16) | 0.14 |
| Peripheral arterial disease | 86 (13.3) | 18 (11.3) | 0.77 (0.43–1.29) | 0.44 |
| Chronic pulmonary disease | 130 (20.1) | 28 (17.6) | 0.90 (0.55–1.21) | 0.22 |
| Hypertension | 472 (73.1) | 112 (70.4) | 0.85 (0.58–1.18) | 0.19 |
| Prior myocardial infarction | 269 (41.6) | 68 (42.8) | 1.08 (0.78–1.52) | 0.68 |
| Triple vessel disease | 421 (65.2) | 96 (60.4) | 0.98 (0.70–1.41) | 0.33 |
| Ejection fraction <40% | 61 (9.4) | 12(7.5) | 0.84 (0.45–1.54) | 0.41 |
| Left atrial dimension, mm | 40 ± 7 | 40 ± 6 | 0.97 (0.94–1.04) | 0.91 |
| Preoperative drugs | ||||
| Oral antidiabetics | 111 (17.2) | 16 (10.1) | 0.56 (0.34–0.94) | 0.03 |
| Insulin | 117 (18.1) | 20 (12.6) | 0.60 (0.35–1.07) | 0.10 |
| Renin angiotensin system inhibitors | 268 (41.5) | 65 (40.9) | 0.93 (0.60–1.44) | 0.80 |
| Beta blockers | 458 (70.9) | 110 (69.2) | 0.91 (0.61–1.41) | 0.65 |
| Statins | 439 (68.0) | 90 (56.6) | 0.72 (0.50–0.88) | 0.01 |
| Operative data | ||||
| Operative duration, h | 4.3 ± 1.1 | 4.6 ± 1.1 | 1.24 (1.11–1.58) | 0.03 |
| Complete revascularization | 628 (97.2) | 154 (96.9) | 0.99 (0.67–1.49) | 0.56 |
| Postoperative data | ||||
| Inotropic support for >24 h | 45 (7.0) | 20 (12.6) | 1.70 (1.12–2.53) | 0.03 |
| Insulin used during intensive care | 0.03 | |||
| None | 292 (45.2) | 84 (52.8) | 1 (Ref) | |
| 1–20, units | 202 (31.3) | 51 (32.1) | 1.05 (0.77–1.40) | |
| ≥ 21, units | 152 (23.5) | 24 (15.1) | 0.56 (0.35–0.92) | |
| Transfusion | 282 (43.7) | 77 (48.4) | 1.22 (0.89–1.82) | 0.28 |
| Drugs initiated on postoperative day 1 | ||||
| Renin angiotensin system inhibitors | 410 (63.5) | 101 (63.5) | 0.99 (0.66–1.32) | 0.38 |
| Beta blockers | 548 (84.8) | 136 (85.5) | 0.98 (0.77–1.28) | 0.81 |
| Statins | 552 (85.4) | 135 (84.9) | 0.94 (0.65–1.30) | 0.59 |
Data are number (percent), mean ± standard deviation, or median [25th–75th percentile]. EuroSCORE: European System for Cardiac Operative Risk Evaluation