[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 3

Changes in the cross-sectional area difference of BPMM and multifidus muscle in the observation group before and after therapy.

Time	Cross-sectional area difference of BPMM (cm^2)	Cross-sectional area difference of multifidus muscle (cm^2)
Before therapy (n = 60)	1.41 ± 0.38	0.94 ± 0.23
After therapy (n = 60)	0.76 ± 0.27	0.23 ± 0.12
T-value	11.948	19.963
value	<0.001	<0.001