[Retracted] Value of Lumbar MRI Parameters in the Evaluation of Postoperative Curative Effect on Patients with Lumbar Disc Herniation and Analysis of Risk Factors

Table 5

Assignment.

Factors	Assignment
Age	≤50 years = 1, >50 years = 2
Gender	Male = 1, female = 2
Course of disease	≤3 years = 1, >3 years = 2.
Cross-sectional area difference of BPMM after therapy	≤0.79 cm^2 = 1, >0.79 cm^2 = 2
Cross-sectional area difference of multifidus muscle after therapy	≤0.23 cm^2 = 1, >0.23 cm^2 = 2
Clinical efficacy	Excellent + good = 1, moderate + ineffective = 2.