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Classification and Prognostic Factors of Residual Symptoms After Minimally Invasive Lumbar Decompression Surgery Using a Cluster Analysis: a 5-Year Follow-up Cohort Study by Hiromitsu Toyoda; Kentaro Yamada; Hidetomi Terai; Masatoshi Hoshino; Akinobu Suzuki; Shinji Takahashi; Koji Tamai; Shoichiro Ohyama; Yusuke Hori; Akito Yabu; Hamidullah Salimi; Hiroaki Nakamura is a Medicine article available to read on EtoBox.

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## Purpose: Residual symptoms indicating incomplete remission of lower leg numbness or low back pain may occur after spine surgery. the purpose was to elucidate the pattern of residual symptoms 5 years after minimally invasive lumbar decompression surgery using a cluster analysis. ## Methods: The study comprised 193 patients with lumbar spinal stenosis (lss) (108 men, 85 women) ranging in age from 40 to 86 years (mean, 67.9 years). each patient underwent 5-year follow-up. the japanese orthopedic association score and visual analog scale scores for low back pain, leg pain, and leg numbness at 5 years were entered into the cluster analysis to characterize postoperative residual symptoms. other clinical data were analyzed to detect the factors significantly related to each cluster. ## Results: The analysis yielded four clusters representing different patterns of residual symptoms. patients in cluster 1 (57.0%) were substantially improved and had few residual symptoms of lss. patients in cluster 2 (11.4%) were poorly improved and had major residual symptoms. patients in cluster 3 (17.6%) were greatly improved but had mild residual low back pain. patients in cluster 4 (14.0%) were impro

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Author

Hiromitsu Toyoda; Kentaro Yamada; Hidetomi Terai; Masatoshi Hoshino; Akinobu Suzuki; Shinji Takahashi; Koji Tamai; Shoichiro Ohyama; Yusuke Hori; Akito Yabu; Hamidullah Salimi; Hiroaki Nakamura

Publisher

Springer Science and Business Media LLC

Published

2021

Language

EN

Field

Medicine (Health Sciences)