Table 3.

Postoperative Variables in Each Group.

Variables	Satisfied (n = 95)	Dissatisfied (n = 31)	P a
Operation time, min, mean (SD)	76.1 (33.2)	73.9 (30.9)	.745
EBL, g, mean (SD)	54.6 (52.4)	65.6 (60.0)	.331
No. of decompression levels, mean (SD)	1.7 (0.9)	1.9 (1.0)	.248
JOA recovery rate, mean (SD)	80.0 (18.0)	57.9 (23.0)	<.001
NRS, mean (SD)
LBP	2.1 (2.0)	3.8 (2.4)	<.001
Leg pain	1.6 (1.8)	3.1 (2.3)	<.001
Leg numbness	1.6 (1.9)	3.1 (2.5)	<.001
NRS change,b mean (SD)
LBP	3.7 (3.1)	1.8 (3.0)	.004
Leg pain	4.5 (2.9)	2.2 (3.2)	<.001
Leg numbness	4.2 (3.0)	2.3 (2.3)	<.001
SF-8, mean (SD)
PCS	46.3 (6.6)	37.7 (6.7)	<.001
MCS	51.0 (5.4)	45.8 (6.8)	<.001

Abbreviations: EBL, estimated blood loss; JOA, Japanese Orthopaedic Association; NRS, Numeric Rating Scale; LBP, low back pain; SF-8, Short Form–8; PCS, physical component summary, MCS, mental component summary.

^a Boldfaced values represent P < .05.

^b Pre NRS − post NRS.