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Table 3 Multivariate logistic regression model for high intraoperative blood loss (≥ 500 mL)

From: Predictive factors for intraoperative blood loss in surgery for adolescent idiopathic scoliosis

Factors Regression coefficient (B) Standard error Wald X2 p-value Odds Ratio 95% CI
Constant −7.610 2.927 6.759 0.009*   
Sex −1.131 0.830 1.860 0.173 0.323 0.06 to 1.64
Preoperative Hb 0.195 0.142 1.893 0.169 1.216 0.92 to 1.61
Preoperative Cobb angle 0.020 0.021 0.897 0.344 1.020 0.98 to 1.06
Number of fused level −0.162 0.133 1.473 0.225 0.851 0.66 to 1.10
Operation duration 0.015 0.004 14.931 < 0.001* 1.015 1.01 to 1.02
Number of anchors 0.310 0.110 8.013 0.005* 1.364 1.10 t0 1.69
Albumin 0.013 0.036 0.137 0.711 1.014 0.94 to 1.09
  1. * Significance at p-value < 0.05
  2. CI Confidence interval