Impact of computed tomography/magnetic resonance imaging registration on rehabilitation after percutaneous endoscopic decompression for lumbar stenosis: Retrospective study

Table 2 Primary and secondary outcomes

Outcome	The CT/MRI registration group (n = 71)	The control group (n = 64)	Mean difference	P value
Surgery time (minute)	90.39 ± 12.71	98.22 ± 19.92	-7.82	0.007
Hospital stay (day)	6.59 ± 3.29	8.19 ± 6.70	-1.60	0.077
VAS leg pain preoperative	8.10 ± 0.74	8.13 ± 0.68	-0.03	0.830
VAS leg pain postoperative 2 months	2.34 ± 0.83a	2.94 ± 1.13a	-0.60	< 0.001
VAS low back pain preoperative	3.79 ± 1.22	3.95 ± 1.42	-0.16	0.470
VAS low back pain postoperative 2 months	1.69 ± 1.02a	2.33 ± 1.21a	-0.64	0.001
JOA preoperative	10.92 ± 2.21	11.30 ± 1.91	-0.38	0.287
JOA postoperative 2 months	24.27 ± 2.81a	22.58 ± 3.79a	1.69	0.004

^aP < 0.001, comparisons with preoperative values.

VAS: Visual analog scale; JOA: The Japanese Orthopaedic Association lumbar spine score; CT: Computed tomography; MRI: Magnetic resonance imaging.