Numbness and Weakness Recovered at a Less Extent in Patients with Lumbar Disc Herniation after Percutaneous Endoscopic Lumbar Discectomy

Table 5

Demographics, preoperative ODI score, duration of preoperative symptoms, and imaging grade stratified by presence of numbness and/or weakness.

Variables	Numbness and/or weakness group (57)	Pain alone group (29)	p value^#
Age, mean (SD)	50 (16.0)	48 (17.9)	0.486
Male, n (%)	31 (54.3)	13 (44.8)	0.403
BMI, mean (SD)	25.3 (4.08)	24.9 (3.24)	0.690
Duration of symptoms, mean (SD)	171 (290.3)	16 (16.0)	0.006^#
Preop ODI, mean (SD)	51.3 (23.0)	45.6 (20.0)	0.266
Imaging grade A, n (%)	18 (31.5%)	14 (48.2%)	0.123^#
Joint effect of duration of symptoms and imaging grade	—	—	0.004^#

For qualitative variables, the total number of patients and the percentage are provided. For quantitative variables, the mean and standard deviation are provided. These predictive variables are first assessed individually; the significance levels are also listed. ^#Indicates predictive variables included in the final model.