Table 3:

Odds ratios and 95% confidence intervals for association between hemoglobin A1c (per 1% increase and by hemoglobin A1c tertile) and postoperative atrial fibrillation

	Model 1	Model 2	Model 3
Per 1 % increase	0.70 (0.61–0.83)	0.74 (0.60–0.92)	0.78 (0.63–0.95)
Lower tertile	1 (Ref)	1 (Ref)	1 (Ref)
Upper tertile	0.42 (0.29–0.70)	0.54 (0.31–0.90)	0.55 (0.35–0.88)

Values are odds ratio (95% confidence interval). Model 1 includes HbA1c alone. Model 2 HbA1c, age, smoking, chronic kidney disease, chronic pulmonary disease, hypertension, preoperative oral antidiabetics, preoperative statins, operative duration, inotropic support for >24 h, and insulin used during intensive care, and model 3 HbA1c, age, sex, body mass index, chronic kidney disease, chronic pulmonary disease, hypertension, triple vessel disease, ejection fraction of <40%, left atrial dimension, preoperative beta blockers, preoperative statins, inotropic support for >24 h, and transfusion. Cutoff points for tertiles: lower, 3.8–5.6%; upper, 6.8–11.4%.