Comparison of Endoscope-Assisted and Microscope-Assisted Tubular Surgery for Lumbar Laminectomies and Discectomies: Minimum 2-Year Follow-Up Results

Table 1

Patient demographics.

	Group A (n=35)	Group B (n=30)	Group C (n=127)	Group D (n=115)
Age, mean (SD), year	61.66(13.07)	62.93(12.26)	48.69(13.07)	46.3(13.98)
Female sex, No.(%)	16(45.7)	14(46.7)	53(41.7)	52(45.2)
Levels
L3-4	3	0	4	2
L4-5	26	27	75	58
L5-S1	6	3	48	55