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BMC Musculoskeletal Disorders
Published in: BMC Musculoskeletal Disorders 1/2020

Open Access 01-12-2020 | Scoliosis | Research article

Relationship between characteristics of spinopelvic alignment and quality of life in Japanese patients with ankylosing spondylitis: a cross-sectional study

Authors: Tatsuya Sato, Ikuho Yonezawa, Hisashi Inoue, Kurisu Tada, Shigeto Kobayashi, Eri Hayashi, Naoto Tamura, Kazuo Kaneko, Juntendo AS Research Group

Published in: BMC Musculoskeletal Disorders | Issue 1/2020

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Abstract

Background

Studies on characteristic spinal deformities in Japanese patients with ankylosing spondylitis (AS) and data demonstrating a relationship between health-related quality of life (HRQOL) and spinopelvic alignment in these patients are lacking.

Methods

In this cross-sectional study, 50 patients with AS and without a surgical history, vertebral body fracture, or scoliosis as well as 30 control patients with degenerative lumbar kyphoscoliosis (DLKS) were included. Data collected included patient sex, age, spinopelvic parameters on sagittal full-spine standing radiographs, and HRQOL questionnaire responses. Student’s t-test was used to compare the characteristics of spinopelvic parameters between the groups. A multiple regression analysis was performed to analyze correlations between spinopelvic parameters and HRQOL in the AS group.

Results

Global kyphosis (GK; T1–12 angle) was significantly greater in the AS group than in the DLKS group (P < 0.001), whereas the pelvic tilt (PT; posterior PT angle) was smaller in the AS group (P = 0.006). Radiographic parameters correlated with HRQOL in the AS group. Multiple regression analysis identified the sagittal vertical axis (SVA) and sacral slope (SS) as factors influencing the SRS-22 total score and SVA and GK as factors influencing Japanese Orthopaedic Association Back Pain Evaluation Questionnaire mental health (subdomain).

Conclusions

Patients with AS did not use lumbar lordosis or posterior PT to compensate for their large thoracic kyphosis due to spinopelvic ankylosis. These patients showed a unique compensation pattern. The correlation/regression analysis revealed a correlation between radiographic parameters and HRQOL in patients with AS, with particular importance of SVA, SS, and GK for clinical results in AS.
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Metadata
Title
Relationship between characteristics of spinopelvic alignment and quality of life in Japanese patients with ankylosing spondylitis: a cross-sectional study
Authors
Tatsuya Sato
Ikuho Yonezawa
Hisashi Inoue
Kurisu Tada
Shigeto Kobayashi
Eri Hayashi
Naoto Tamura
Kazuo Kaneko
Juntendo AS Research Group
Publication date
01-12-2020
Publisher
BioMed Central
Published in
BMC Musculoskeletal Disorders / Issue 1/2020
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/s12891-020-3040-z

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