Table 3.
Comparison of Postoperative Atrial Fibrillation and Propensity Matched Score Control Group
| Variables | PSM Control (n = 513) | PoAF (n = 513) | P Value | Std. Diff. |
|---|---|---|---|---|
| Age, years | ||||
| <50 | 13 (3) | 16 (3) | … | 0.03 |
| 50–59 | 61 (12) | 69 (13) | … | 0.05 |
| 60–69 | 170 (33) | 161 (31) | … | −0.04 |
| 70–79 | 208 (41) | 194 (38) | … | −0.06 |
| >85 | 61 (12) | 73 (14) | 0.63 | 0.07 |
| Female | 111 (22) | 106 (21) | 0.76 | −0.02 |
| Medical history | ||||
| Prior atrial fibrillation | 59 (12) | 64 (12) | 0.70 | 0.03 |
| Hypertensiona | 410 (80) | 415 (81) | 0.75 | −0.02 |
| Diabetes mellitus | 164 (32) | 162 (32) | 0.95 | −0.01 |
| Myocardial infarction | 230 (45) | 216 (42) | 0.41 | −0.06 |
| COPD | 26 (5) | 25 (5) | 1.00 | −0.01 |
| ECI score | ||||
| 0–3 | 145 (28) | 142 (28) | … | −0.01 |
| 4–5 | 231 (45) | 229 (45) | … | −0.01 |
| 6–12 | 137 (28) | 142 (28) | 0.94 | 0.02 |
| Preoperative assessment | ||||
| Creatinine >1.5 mg/dL | 38 (7) | 38 (7) | 1.00 | … |
| LVEF < 40%a | 62 (12) | 66 (13) | 0.78 | −0.02 |
| Preoperative medications | ||||
| Diuretic | 144 (28) | 146 (28) | 0.94 | −0.01 |
| Statin | 380 (74) | 375 (73) | 0.78 | −0.02 |
| Operative characteristics | ||||
| CPB duration, minutes | 119 51 | 123 59 | 0.28 | 0.07 |
| CABG only | 429 (84) | 415 (81) | … | … |
| Any valve surgery | 84 (16) | 98 (19) | 0.29 | 0.07 |
| Any aortic valve surgery | 50 (10) | 59 (11) | 0.42 | 0.06 |
| Any mitral valve surgery | 40 (8) | 42 (8) | 0.91 | 0.01 |
| Ablation/maze | 15 (3) | 8 (2) | 0.21 | −0.09 |
a
Variable contains 1 or more patients with imputed data. Values are n (%).
CABG = coronary artery bypass graft; COPD = chronic obstructive pulmonary disease; CPB = cardiopulmonary bypass; ECI = Elixhauser comorbidity index; LVEF = left ventricular ejection fraction; PoAF = postoperative atrial fibrillation; PSM = propensity score matched; Std. Diff. = standardized difference.