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Table 1 Results of univariate analysis [n (%)]

From: Risk factors of atrial fibrillation occurring after radical surgery of esophageal carcinoma

Factors No AF(n = 287) AF(n = 48) χ2 P values OR 95% CI
Age
  < 70 198 (93%) 15 (7%) 25.29 0.000 4.89 (2.53,9.47)
  ≥ 70 89 (73%) 33 (27%)
Gender
 Male 201 (76.7%) 61 (23.3%) 6.104 0.013 2.26 (1.17,4.37)
 Female 65 (89.0%) 8 (11.0%)
History of smoking
 No 114 (85.7%) 19 (14.3%) 0.000 0.986 1.006 (0.538,1.880)
 Yes 173 (85.6%) 29 (14.4%)
Hypertension
 No 198 (87.6%) 28 (12.4%) 2.127 0.145 1.59 (0.85,2.97)
 Yes 89 (81.7%) 20 (18.3%)
History of peripheral vascular disease
 No 254 (87.3%) 37 (12.7%) 4.699 0.030 2.29 (1.06,4.92)
 Yes 33 (75%) 11 (25.0%)
History of cardiac stents or angina pectoris
 No 273 (93.2%) 20 (6.8%) 107.16 0.000 27.30 (12.44,59.91)
 Yes 14 (33.3%) 28 (66.7%)
Preoperative pulmonary infection
 No 252 (85.7%) 42 (14.3%) 0.004 0.952 1.03 (0.41,2.59)
 Yes 35 (85.4%) 6 (14.6%)
Preoperative BNP
  < 100 279 (91.2%) 27 (8.8%) 87.261 0.000 27.13 (10.97,67.06)
  ≥ 100 8 (27.6%) 21 (72.4%)
Preoperative left-ventricular diastolic dysfunction
 No 203 (89.0%) 25 (11.0%) 6.579 0.012 2.22 (1.19,4.14)
 Yes 84 (78.5%) 23 (21.5%)
Operative methods
 Combined 102 (91.1%) 10 (8.9%) 3.996 0.046 2.09 (1.002,4.380)
 Open 185 (83.0%) 38 (17.0%)
Lesion location
 Lower 130 (85%) 23 (15.0%) 0.114 0.736 0.900 (0.488,1.660)
 Middle or upper 157 (86.3%) 25 (13.7%)
Blood transfusion
 No 278 (90.6%) 29 (9.4%) 71.31 0.000 20.24 (8.39,48.82)
 Yes 9 (32.1%) 19 (67.9%)
Adhesion to pericardium
 No 152 (89.9%) 17 (10.1%) 5.064 0.024 2.05 (1.08,3.87)
 Yes 135 (81.3%) 31 (18.7%)
  1. Notes: AF Atrial fibrillation, BNP Brain natriuretic peptide, OR odds ratio, CI confidence interval