Lumbar Spine Wound Complication Risk Calculator

Patient factors

BMI (kg/m²)

Preop CRP (mg/L)

Blood loss (mL)

Comorbidities

Diabetes type 2

Congestive heart failure

Surgical factors

Prior lumbar surgery

Intraoperative dural tear

Complication risk

3.0%

Low risk

No elevated risk factors entered.

Model notes: Defaults reflect cohort averages (BMI 27 kg/m², CRP 1.2 mg/L, blood loss 200 mL, no comorbidities). BMI contributes only for units above 25. Logistic regression coefficients: BMI OR 1.07/unit above 25; CRP OR 1.01/mg/L; diabetes type 2 OR 2.08; CHF OR 4.65; prior lumbar surgery OR 1.99; dural tear OR 1.77; blood loss OR 1.01/100 mL. Intercept calibrated to ~3% cohort prevalence.