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Related Experiment Video

Updated: May 22, 2026

Evaluation of Patients' Posture and Gait Profile After Lumbar Fusion Surgery by Video Rasterstereography and Treadmill Gait Analysis
07:44

Evaluation of Patients' Posture and Gait Profile After Lumbar Fusion Surgery by Video Rasterstereography and Treadmill Gait Analysis

Published on: March 23, 2019

Cervical Sagittal Alignment and Patient-Reported Outcomes in Posterior Cervical Fusion: A Longitudinal Comparative

Daniel W Griepp1, Michael H Lawless2, Ascher B Kaufmann3

  • 1Division of Neurosurgery, Henry Ford Providence Hospital, Michigan State University College of Human Medicine, Southfield, MI, USA.

International Journal of Spine Surgery
|May 20, 2026
PubMed
Summary

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Achieving normative cervical sagittal alignment after posterior cervical fusion does not independently improve patient outcomes. This study found comparable results between patients with normative and non-normative alignment.

Area of Science:

  • Spine surgery outcomes research
  • Orthopedic biomechanics
  • Patient-reported outcome measures

Background:

  • The relationship between cervical sagittal parameters and patient-reported outcomes (PRO) following posterior cervical fusion (PCF) is not fully understood.
  • Investigating whether achieving normative sagittal cervical alignment influences PRO after PCF is crucial for surgical decision-making.
  • Previous studies have yielded inconclusive results regarding the impact of cervical alignment on surgical success.

Purpose of the Study:

  • To determine if normative sagittal cervical alignment is independently associated with improved patient-reported outcomes (PRO) after posterior cervical fusion (PCF).
  • To evaluate the association between specific cervical sagittal parameters (cSVA, McGS, T1S-CL) and the achievement of minimum clinically important differences (MCID) in PRO.
Keywords:
cervical alignmentcervical sagittal parameterspatient-reported outcomesposterior cervical fusionspine osteoarthritis

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Last Updated: May 22, 2026

Evaluation of Patients' Posture and Gait Profile After Lumbar Fusion Surgery by Video Rasterstereography and Treadmill Gait Analysis
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Published on: March 23, 2019

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Main Methods:

  • Retrospective review of 104 patients undergoing multi-level PCF for degenerative conditions.
  • Measurement of cervical sagittal vertical axis (cSVA), McGregor's slope (McGS), and T1 slope minus C2-7 lordosis (T1S-CL) from radiographs.
  • Analysis of patient-reported outcomes (PRO) using validated scales, comparing normative vs. non-normative alignment groups.

Main Results:

  • All PRO demonstrated significant improvement at 1-year follow-up, with MCID achievement rates varying by outcome measure.
  • No significant difference in PRO was observed between patients with normative and non-normative postoperative cervical sagittal alignment.
  • Changes in McGS, cSVA, or T1S-CL from non-normative to normative alignment were not independently associated with increased odds of achieving MCID for PRO.

Conclusions:

  • Achievement of minimum clinically important difference (MCID) in patient-reported outcomes (PRO) was comparable between patients with normative and non-normative postoperative cervical sagittal alignment after multi-level PCF.
  • Normative cervical sagittal alignment parameters (cSVA, McGS, T1S-CL) following PCF surgery are not independently associated with improved PRO.