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Table 3 Comparison of pain levels (\(\overline{x}\) ± s, points)

From: Efficacy of lumbar decompression under large-channel spinal endoscope in elderly patients with segmental lumbar spinal stenosis

Time

Study group (n = 34)

Control group (n = 34)

t/χ2

p

Before surgery

6.91 ± 1.98

6.87 ± 1.87

0.086

0.932

1 week after surgery

2.01 ± 0.32

3.08 ± 0.19

− 16.765

< 0.001

3 months after surgery

1.18 ± 0.21

2.17 ± 0.24

− 18.101

< 0.001

1 year after surgery

0.87 ± 0.19

1.76 ± 0.22

− 17.853

< 0.001

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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X