Table 2 Sample characteristics based on OPCAB-POAF status

sex = male (%)

288 (90.3)

225 (90.7)

63 (88.7)

0.785

age (median [IQR])

63.00 [55.00, 68.00]

62.00 [54.00, 67.00]

64.00 [56.50, 69.00]

0.053

cigarette = yes (%)

202 (63.3)

156 (62.9)

46 (64.8)

0.88

drinking = yes (%)

156 (48.9)

123 (49.6)

33 (46.5)

0.742

diabetes = yes (%)

138 (43.3)

97 (39.1)

41 (57.7)

0.008

hypertension = yes (%)

184 (57.7)

133 (53.6)

51 (71.8)

0.009

hyperlipidemia = yes (%)

35 (11.0)

28 (11.3)

7 (9.9)

0.901

cerebrovascular accident = yes (%)

24 (7.5)

14 (5.6)

10 (14.1)

0.034

myocardial infarction = yes (%)

86 (27.0)

68 (27.4)

18 (25.4)

0.846

Previous PCI = yes (%)

39 (12.2)

21 (8.5)

18 (25.4)

< 0.001

NYHA ≥ III = yes (%)

99 (31.0)

71 (28.6)

28 (39.4)

0.112

EF (median [IQR])

60.00 [48.00, 67.80]

60.10 [49.08, 68.28]

59.00 [44.15, 65.15]

0.038

LVED (median [IQR])

48.90 [45.10, 52.85]

48.50 [44.90, 52.32]

49.50 [45.65, 54.00]

0.11

LAD (median [IQR])

35.70 [32.05, 39.60]

35.60 [31.67, 39.20]

36.50 [33.30, 41.10]

0.018

Preoperative NTpro-BNP (mean (SD))

681.85 (1043.42)

662.00 (1063.64)

751.18 (973.45)

0.526

Anesthesia duration (median [IQR])

312.00 [284.00, 344.00]

316.00 [288.25, 341.50]

294.00 [271.50, 351.00]

0.092

Last intraoperative blood potassium concentration (median [IQR])

4.10 [3.80, 4.50]

4.20 [3.90, 4.60]

3.90 [3.65, 4.10]

< 0.001

ICU mechanical ventilation time (median [IQR])

22.00 [19.00, 38.50]

22.00 [19.00, 37.00]

21.00 [19.00, 41.50]

0.721

ICU stay time (median [IQR])

67.00 [43.00, 95.00]

67.00 [43.75, 93.00]

68.00 [43.00, 115.00]

0.33

postoperative drainage volume (median [IQR])

965.00 [581.00, 1430.00]

855.00 [530.00, 1307.25]

1180.00 [860.50, 1618.00]

0.001