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Table 4 Effect of demographic variables on results as dichotomised by sVCAM-1 cut off of 597.7 ng/L

From: Pre-operative serum VCAM-1 as a biomarker of atrial fibrillation after coronary artery bypass grafting

Continuous Variables

Coefficient

SE

p

95% CI

Pre-operative demographics

Age (yrs)

0.0209

0.0383

0.585

−0.054, 0.096

BMI (kg/m2)

−0.0265

0.113

0.815

−0.249, 0.196

Height (m)

0.500

3.992

0.900

−7.324, 8.325

Weight (kg)

−0.004

0.0438

0.923

−0.090, 0.082

Bypass time

0.0138

0.0215

0.520

−0.028, 0.056

X-clamp time

0.0066

0.0204

0.747

−0.033, 0.047

White cell count

−0.282

0.412

0.493

−1.089, 0.525

Platelet count

−0.021

0.0225

0.356

−0.065, 0.023

Dichotomous Variables

sVCAM1 < 597.7

(n = 23)

sVCAM1 ≥ 597.7 (n = 9)

Chi^2

p-value

Gender (M)

76.2%

62.5%

0.5435

0.461

MI

36.4%

0%

3.5152

0.061

PVD

9.0%

0%

0.6835

0.408

Stroke/TIA

10%

14.3%

0.1545

0.694

Hypertension

63.6%

100%

3.5152

0.061

Hypercholesterolaemia

86.4%

100%

1.0647

0.302

Family History

63.6%

42.9%

0.9453

0.331

Diabetes

- On Insulin

40.9%

27.2%

85.7%

28.5%

4.2693

0.0045

0.039*

0.947

Smoking

29.4%

0%

1.9223

0.166

Alcohol >10u per week

61.9%

60%

0.7778

0.378

LMS disease

40%

50%

0.0241

0.877

Pre-operative medication

Beta-blocker use

80%

66.7%

4.0727

0.517

Statin use

92.9%

100%

0.4511

0.502

Aspirin use

93.3%

100%

0.4200

0.517

Post-op Atrial fibrillation

22.7%

50%

2.0779

0.149

  1. The asterisks denote standard statistical notation for significance. * - p < 0.05