Table 4. Factor comparison for patients of lumbar degenerative disease stratified by recovery status.

Factor	Recovered (21)	Unrecovered (114)	p value
mean preop Sx duration (days)	86.3	204.9	0.0362*
mean preop muscle strength of TA	2.55	1.83	0.0025*
mean age (yrs)	49.7	56.0	0.0213*
sex (M/F)	11:10	51:63	0.6350†
sensation defect of lower limb (yes/no)	12:9	81:33	0.2111†
affected foot (bilateral/unilateral)	3:18	15:99	1†
dignosis (LDH/LSS)	13:8	49:65	0.1525*
compressed nerve roots (multiple/single)	19:2	107:7	0.6302†

TA= tibialis anterior; LDH= lumbar disc herniation; LSS= lumbar spinal stenosis; * Mann-Whitney U-test; † Fisher exact probability test