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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