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Published on: March 23, 2019
Association between trunk extensor strength and gait-induced back pain in the elderly with adult spinal deformity: a
Keita Sato1, Masumi Iwabuchi2, Tatsuya Endo2
1Departments of Rehabilitation / Orthopaedic and Spinal Surgery, Aizu Medical Center, Fukushima Medical University, 21-2, Tanisawa-aza-maeda, Kawahigashi, Aizuwakamatsu, 969-3492, Fukushima, Japan. keita-s@fmu.ac.jp.
Purpose:
The purpose of the present study was to investigate the association between quantitatively assessed trunk extensor strength and gait-induced back pain (GIBP) in patients with adult spinal deformity (ASD).
Methods:
Ninety-five patients with ASD aged ≥ 50 years who were admitted to our hospital between April 2018 and March 2023 were included in the study. GIBP was evaluated through a 6-minute walking test (6MWT), with GIBP being defined as the occurrence of back pain during the evaluation and inability to complete the test. The patients were divided into three groups: difficulty completing the 6MWT (Group 1), ability to complete the 6MWT with breaks (Group 2), and ability to complete the 6MWT without taking a break (Group 3). The main independent variable was trunk extensor strength, which was measured using a hand-held dynamometer. Ordered logistic regression analysis was conducted to assess the association between GIBP and trunk extensor strength while adjusting for basic characteristics and radiographic parameters as covariates.
Results:
The numbers of patients with ASD included in each group were; 27 in Group 1 (28.4%), 31 in Group 2 (32.6%), and 37 in Group 3 (39.0%). An ordered logistic regression analysis adjusted for basic characteristics and radiographic parameters, trunk extensor strength was significantly associated with GIBP (odds ratios, 1.128; 95% confidence intervals, 1.025-1.242).
Conclusions:
The results of the present study strongly indicate that trunk extensor strength is a valuable factor associated with GIBP in patients with ASD.
