The standing and sitting sagittal spinopelvic alignment of Chinese young and elderly population: does age influence the differences between the two positions?

  • Siyu Zhou
  • Zhuoran Sun
  • Wei Li
  • Wei Wang
  • Tong Su
  • Chengbo Du
  • Weishi LiEmail author
Original Article



To investigate the characteristics of standing and sitting spinopelvic sagittal alignment among Chinese healthy population with different age groups.


This cross-sectional, prospective study included a total of 235 volunteers aged 19 to 71 years. Volunteers were divided into two groups: group A (age ≤ 40 years; n = 140) and group B (age > 40 years, n = 95). Student’s t test was performed to compare the sagittal parameters including sagittal vertical axis (SVA), T1 pelvic angle (TPA), cervical lordosis (CL), thoracic kyphosis (TK), lumbar lordosis (LL) and pelvic tilt (PT) between standing and sitting positions of two groups. Multiple regression was performed to explore the influence factors of differences between two positions.


In the standing position, group B had larger SVA, TK, PT and TPA than group A. When moving from standing to sitting position, increased SVA and PT were found in both groups, accompanied by decreased LL and TK. However, despite similar change in SVA, group B presented with lesser changes in LL, PT and TPA than group A in sitting position. Age and gender independently influenced the difference in PT and LL.


In the standing position, the older volunteers showed larger SVA, TPA, TK, CL and PT than young population. Both groups showed similar changes when moving from standing to sitting, but the differences between the positions were smaller in older population. These characteristics in the standing and sitting positions of different age groups should be considered when planning surgical reconstruction of sagittal alignment.

Graphic abstract

These slides can be retrieved under Electronic Supplementary Material.


Sitting Elderly Spinal deformity Sagittal alignment Standing 



This study was funded by AOSPINE China Research Grant (2017-06).

Compliance with ethical standards

Conflict of interest

The authors declared no potential conflicts of interest with respect to the research, authorship and/or publication of this article.

Supplementary material

586_2019_6185_MOESM1_ESM.pptx (2.3 mb)
Supplementary material 1 (PPTX 2325 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Siyu Zhou
    • 1
    • 2
  • Zhuoran Sun
    • 1
  • Wei Li
    • 1
    • 2
  • Wei Wang
    • 1
    • 2
  • Tong Su
    • 1
    • 2
  • Chengbo Du
    • 1
    • 2
  • Weishi Li
    • 1
    Email author
  1. 1.Orthopaedic DepartmentPeking University Third HospitalBeijingChina
  2. 2.Peking University Health Science CenterBeijingChina

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