Hang He · Research calculator

Nomogram for rLDH After PELD

Updated five-predictor model for estimating the probability of recurrent lumbar disc herniation within 2 years after percutaneous endoscopic lumbar discectomy.

Age, years

BMI, kg/m²

Modic change

Pfirrmann grade

Sagittal range of motion, degrees

Model version 1.0 · June 2026. The model was updated using the development and temporal-validation cohorts and evaluated in an independent geographic cohort. All calculations are performed locally in the browser; entered values are not transmitted or stored.