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Table 4 Prediction factors for blood transfusion risk in posterior lumbar spinal fusion

From: Establishment and assessment of a nomogram for predicting blood transfusion risk in posterior lumbar spinal fusion

Variable β Prediction model
Odds ratio 95% Confidence interval P Value
Lower Upper
Intercept − 1.3119 0.2693 0.0250 2.9201 0.279361
Levels of fusion 0.4421 1.5560 1.2017 2.0187 0.000815 **
Total intraoperative EBL 0.0067 1.0067 1.0054 1.0082 < 2e− 16 ***
Time to surgery 0.2777 1.3201 1.1014 1.5888 0.002916 **
Operative time 0.0046 1.0047 1.0006 1.0089 0.027468 *
Preoperative Hb − 0.0521 0.9493 0.9309 0.9669 6.92e−08 ***
  1. EBL Estimated blood loss, Hb Hemoglobin, β the regression coefficient