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Table 1 Comparison of patients’ basic information between both groups

From: RETRACTED ARTICLE: Treatment for lumbar spinal stenosis secondary to ligamentum flavum hypertrophy using percutaneous endoscopy through interlaminar approach: a retrospective study

  Control group Endoscopy group
Case (n) 20 20
Male (n) 10 9
Female (n) 10 11
Age (year) 65.65 ± 4.44 67.30 ± 4.23
Average disease duration 4.55 ± 1.85 4.95 ± 2.04
L4–5 (n) 13 14
L5–S1 (n) 7 6