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Sagittal spinal alignment deviation in the general elderly population: a Japanese cohort survey randomly sampled from
Masashi Uehara1, Jun Takahashi1, Shota Ikegami1
1Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan.
Summary
Sagittal spinal alignment shifts forward with age in Japanese adults. This study establishes age and gender-specific benchmarks for spinal alignment, crucial for understanding deviations.
Area of Science:
- Gerontology
- Orthopedics
- Radiology
Background:
- Sagittal spinal alignment changes with age, but population-specific benchmarks are lacking.
- Epidemiological studies are needed to establish standards for spinal alignment deviation.
Purpose of the Study:
- To determine reference values for sagittal spinal alignment, including the cervical spine, in an aged Japanese population.
- To establish age and gender-specific benchmarks for spinal alignment parameters.
Main Methods:
- A Japanese resident cohort study involving random sampling from a municipal registry.
- 413 individuals aged 50-89 years underwent whole spine lateral radiography.
- Measurements of sagittal spinal alignment parameters were analyzed by age and gender groups.
Main Results:
- Global spinal alignments showed increased misalignment with age in both genders.
- Sagittal vertical axis (SVA) forward shift was more frequent in older adults, particularly 80s males and 70s females.
- Cervical spine changes and lumbopelvic shifts occurred earlier in women than men.
Conclusions:
- This study provides the first resident cohort data on average spinal alignment by age and gender in Japanese individuals.
- Spinal balance generally shifts forward with increasing age.
- Cervical spine changes manifest earlier in men, while lumbopelvic shifts appear earlier in women.
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