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Table 1 The association between postoperative atrial fibrillation and patients’ characteristics

From: Predictors of postoperative atrial fibrillation after coronary artery bypass grafting: a prospective observational cohort study

Variables Negative (N = 82) Positive (N = 41) t/X2 P
Age (years), mean ± SD 56.3 ± 8.8 59.7 ± 7.9 − 2.187 0.031*
Gender, n (%) Female 11 (13.4%) 18 (43.9%) 14.100 < 0.001*
Male 71 (86.6%) 23 (56.1%)
Smoking, n (%) Yes 50 (61.0%) 19 (46.3%) 2.377 0.123
No 32 (39.0%) 22 (53.7%)
Valve replacement, n (%) Yes 10 (12.2%) 17 (41.5%) 13.667 < 0.001*
No 72 (87.8%) 24 (58.5%)
Postoperative inotropic support, n (%) Yes 38 (46.3%) 30 (73.2%) 7.959 0.005*
No 44 (53.7%) 11 (26.8%)
LA diameter (cm), mean ± SD 3.9 ± 0.4 4.6 ± 0.5 − 7.914 < 0.001*
CHA2DS2-VASc score, mean ± SD 3 ± 1 4 ± 1 4.663 < 0.001*
  1. LA left atrium, SD standard deviation, t statistic of independent samples t test, X2 statistic of Pearson’s chi-squared test
  2. *Significant at P ≤ 0.05
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