The Study: Sagittal spino-pelvic alignment in adults: The Wakayama Spine Study.
- The study used 1461 subjects
- The researchers took lateral radiographs of the subjects on 40 inch films.
- They looked at pelvic tilt (PT), pelvic incidence (PI), thoracic kyphosis (TK), lumbar lordosis (LL) and sagittal vertical axis (SVA).
- SVA was defined as "the horizontal distance from the C7 plumb line originating at the middle of the C7 vertebral body to the posterior superior endplate of S1".
- The authors found that TK, PT and SVA "increased with age" but the LL decreased with age.
- In addition, they found that TK was greater in the men than the women but they also found that the "LL, PT, and PI" were smaller in the men when compared to the women.
- "Differences in the absolute values of spino-pelvic parameters in each sex were small yet statistically significant." The authors felt that further study was indicated "to corroborate this finding".
Age and sex may affect spinal postural parameters.
This is an interesting article and it may help clinicians to be more aware of what they are likely to find in a particular case.
Reviewer: Roger Coleman DC
Editor: Mark R. Payne DC
Reference: Asai Y, TsutsuiS, Oka H, Yoshimura N, Hashizume H, Yamada H, Akune T, Muraki S, Matsudaira K, Kawaguchi H, Nakamura K, Tanaka S, Yoshida M. Sagittal spino-pelvic alignment in adults: The Wakayama Spine Study. PLoS One 2017 Jun 6;12(6):e0178697. doi: 10.1371/journal.pone.0178697. eCollection 2017.
Link to Abstract: https://www.ncbi.nlm.nih.gov/pubmed/28586366