Table 1. Clinical characteristics of patients in group LDH and group LSS.

Factor	LDH (62)	LSS (73)	p value
mean preop Sx duration (days)	192.5	181.2	0.3291*
mean preop muscle strength of TA	1.75	1.58	0.1836*
mean age (yrs)	44.7	63.7	0.0015*
sex (M/F)	28:34	34:39	1†
sensation defect of lower limb (yes/no)	38:24	55:18	0.0945†
affected foot (bilateral/unilateral)	8:54	10:63	1†
compressed nerve roots (multiple/single)	25:37	67:6	<0.0001†
outcome (recovered/unrecovered)	13:49	8:65	0.1525*

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