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Updated: Jun 16, 2026

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Evaluation of Patients' Posture and Gait Profile After Lumbar Fusion Surgery by Video Rasterstereography and Treadmill Gait Analysis
Published on: March 23, 2019
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Positive Preprocedure Depression Screening Is Associated With Worse Outcomes After Single-Level Posterior-Only Lumbar
Emily Xu1, Ritesh Karsalia1, John Arena1
1Department of Neurosurgery, Perelman School of Medicine at the University of Pennsylvania, Philadelphia , Pennsylvania , USA.
Neurosurgery
|September 3, 2025
Summary
Undiagnosed depression, screened by the Patient Health Questionnaire 2 (PHQ-2), is linked to higher emergency department visits after lumbar fusion surgery. Identifying patients at risk may improve postoperative outcomes.
Area of Science:
- Orthopedic Surgery
- Neurosurgery
- Psychiatry
Background:
- Major depressive disorder affects 10% of US adults, often underdiagnosed in patients with degenerative spine disease and radicular pain.
- Comorbid undiagnosed depression's impact on postoperative outcomes after lumbar fusion is not well understood.
- This study examines the association between undiagnosed depression and short-term outcomes post-lumbar fusion.
Purpose of the Study:
- To assess the relationship between depression screening scores and postoperative outcomes after lumbar fusion.
- To determine if the Patient Health Questionnaire 2 (PHQ-2) can predict increased healthcare utilization post-surgery.
- To isolate the impact of depression on outcomes by controlling for confounding factors.
Main Methods:
- Prospective and retrospective review of 3225 patients undergoing single-level posterior lumbar fusion.
- Utilized the Patient Health Questionnaire 2 (PHQ-2) for depression screening.
- Employed coarsened exact matching to control for demographic and clinical variables.
Main Results:
- 9.5% of patients (306) screened positive for depression risk (PHQ-2 scores 3-6).
- High-risk patients had significantly more 90-day postoperative emergency department visits (OR = 1.93, P = .0348).
- No significant differences were found in intraoperative complications, length of stay, discharge disposition, readmissions, or reoperations.
Conclusions:
- Elevated preoperative PHQ-2 scores correlate with increased postoperative resource utilization after lumbar spinal fusion.
- The PHQ-2 can identify patients at high risk for depression pre-surgery.
- Further research is needed to develop mitigation strategies for improving outcomes and reducing resource use.

