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Table 2 Univariable analyses of the patients in the derivation cohort

From: Prediction of new onset postoperative atrial fibrillation using a simple Nomogram

Variables

No POAF(n = 825)

POAF (n = 293)

P valve

Age, years, median (IQR)

56.0 (45.0–65.0)

63 (55.0–69.0)

< 0.001

Weight, kg, median (IQR)

69.5 (60.0–78.0)

67.0 (58.8–75.9)

0.083

ASA, n (%)

  

0.002

 I

6 (0.7%)

0 (0.0%)

 

 II

174 (21.1%)

38 (13.0%)

 

 III

440 (53.3%)

159 (54.3%)

 

 IV

204 (24.7%)

95 (32.4%)

 

 V

1 (0.1%)

1 (0.34)

 

NYHA

  

0.015

 I

241 (29.2%)

69 (23.5%)

 

 II

342 (41.5%)

123 (42.0%)

 

 III

224 (27.2%)

85 (29.0%)

 

 IV

18 (2.2%)

16 (5.5%)

 

EuroSCORE II, median (IQR)

1.18 (0.75–2.35)

1.83 (0.93–3.70)

< 0.001

Medical history, n (%)

   

 Preoperative  Diuretics

532 (64.5%)

218 (74.4%)

0.002

 CKD

20 (2.4%)

15 (5.1%)

0.037

Preoperative laboratory values

   

 RBC, × 109/L, median (IQR)

4.45 (4.07–4.82)

4.28 (3.88–4.75)

 < 0.001

 Hgb, g/dL, median (IQR)

136 (121–147)

131 (118–145)

0.020

 HCT, %, median (IQR)

0.39 (0.36–0.43)

0.38 (0.35–0.42)

0.012

 Platelet, × 109/L, median (IQR)

202 (166–245)

185 (150–229)

 < 0.001

 Total plasma protein, g/L, median

67.7 (64.0–71.8)

66.6 (63.5–70.8)

0.019

 Plasma albumin, g/L, median, (IQR)

41.2 (38.5–43.9)

40.4 (37.4–43.0)

0.001

 Scr, μmoI/L, median, (IQR)

77.9 (66.7–89.3)

80.1 (68.6–92.5)

0.031

 Blood urea nitrogen, mmol/L, median

5.7 (4.5–6.7)

6.3 (5.0–7.5)

< 0.001

 eGFR, ml/min/1.73 m2, median (IQR)

88.0 (71.0–106.0)

74.8 (61.5–91.7)

< 0.001

Preoperative echocardiography

   

 LAd, mm, median (IQR)

37.0 (33.0–42.0)

40.0 (35.0–46.0)

< 0.001

 IVS, mm, median (IQR)

11.0 (10.0–12.0)

12.0 (10.0–13.0)

0.002

 LVPW, mm, median (IQR)

11.0 (10.0–12.0)

11.0 (10.0–13.0)

0.002

 LVEF, %, median (IQR)

61.0 (56.0–68.0)

60.0 (52.0–66.0)

0.008

Surgery characteristics, n (%)

   

 Surgery type

  

< 0.001

 Valve

389 (47.2%)

136 (46.4%)

 

 CABG

307 (37.2%)

90 (30.7%)

 

 Valve + CABG

42 (5.1%)

36 (12.3%)

 

 Valve + aorta

87 (10.5%)

31 (10.6%)

 

 MIS, n (%)

183 (22.2%)

47 (16.0%)

0.032

Inotropic drug, n (%)

57 (0.48%)

44 (15%)

 < 0.001

PLT transfusion

197 (23.9%)

102 (34.8%)

0.001

 FFP transfusion, unit, median (IQR)

4.2 (0.0–5.2)

4.9 (0.0–5.9)

 < 0.001

pRBC transfusion, unit, median (IQR)

2.0 (0.0–4.0)

2.5 (0.0–4.0)

 < 0.001

Blood loss, ml, median (IQR)

300 (300–400)

400 (300–500)

 < 0.001

Urine output, ml, median (IQR)

870 (500–1300)

800 (400–1290)

0.045

CPB time, min, median (IQR)

114 (84–157)

125 (92–170)

0.017

Anesthesia time, min, median (IQR)

325 (280–390)

340 (290–405)

0.093

Operation time, min, median (IQR)

270 (230–340)

285 (240–350)

0.077

  1. FFP fresh frozen plasma, HCT hematocrit, Hgb hemoglobin, MIS minimally invasive surgery, PLT platelet, Scr serum creatinine