Table 5 Effect of demographic variables on results as dichotomised by sVCAM-1 cut off of 763.5 ng/L (corresponds to a sensitivity of 50% and a specificity of 95.45%, with 84.38% of patients correctly classified)
Continuous Variables | Coefficient | SE | p | 95% CI |
Pre-operative demographics | ||||
Age (yrs) | 0.053 | 0.052 | 0.312 | −0.049, 0.155 |
BMI (kg/m2) | −0.134 | 0.172 | 0.436 | −0.471, 0.203 |
Height (m) | −0.229 | 4.151 | 0.956 | −8.36, 7.91 |
Weight (kg) | −0.047 | 0.050 | 0.351 | −0.146, 0.052 |
Bypass time | 0.010 | 0.026 | 0.708 | −0.041, 0.061 |
X-clamp time | −0.011 | 0.025 | 0.673 | −0.060, 0.038 |
White cell count | −0.301 | 0.488 | 0.537 | −1.257, 0.655 |
Platelet count | −0.029 | 0.031 | 0.352 | −0.090, 0.032 |
Dichotomous Variables | sVCAM1 < 763.5 (n = 26) | sVCAM1 ≥ 763.5 (n = 6) | Chi^2 | p-value |
Gender (M) | 75% | 60% | 0.4661 | 0.495 |
MI | 32% | 0% | 1.7676 | 0.184 |
PVD | 8% | 0% | 0.3437 | 0.558 |
Stroke/TIA | 8% | 25% | 1.0745 | 0.300 |
Hypertension | 68% | 100% | 1.768 | 0.184 |
Hypercholesterolaemia | 88% | 100% | 0.5354 | 0.464 |
Family History | 64% | 25% | 2.1622 | 0.141 |
Diabetes - On Insulin | 48% 24% | 75% 50% | 1.0067 1.1669 | 0.316 0.280 |
Smoking | 20% | 0% | 0.9667 | 0.326 |
Alcohol >10u per week | 62.5% | 25% | 1.9688 | 0.161 |
LMS | 31.8% | 25% | 0.0739 | 0.786 |
Pre-operative medications | ||||
Beta-blocker use | 73.9% | 50% | 0.9345 | 0.334 |
Statin use | 100% | 87.0% | 0.5870 | 0.444 |
Aspirin use | 100% | 91.3% | 0.3757 | 0.540 |
Post-op Atrial fibrillation | 20% | 75% | 7.143 | 0.008** |