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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