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Table 2 Multivariate linear regression model for factors predicting intra-operative blood loss

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

Predicted model: F (3, 208) = 66.486, p < 0.001
R = 0.700, R2 = 0.490, Adjusted R2 = 0.482
  Unstandardized
Coefficients
Β
Unstandardized Coefficients SE Standardized Coefficients
β
p-value 95% CI for β
Constant −670.785 105.348   < 0.001* − 878.47 to − 463.10
Operation duration (min) 3.131 0.331 0.518 < 0.001* 2.48 to 3.78
Number of anchors 33.840 7.631 0.241 < 0.001* 18.80 to 48.88
Gender
(Female = 1; Male =2)
158.930 58.142 0.140 0.007* 44.31 to 273.55
  1. R multiple correlation coefficient, CI confidence interval, min minute
  2. * Significance at p-value < 0.05