Skip to main content
  • Influence of Gender on Outcomes after Lumbar Spinal Fusion

    Final Number:

    Parth Kothari BS; Jeremy Steinberger MD; Branko Skovrlj MD; Dante Leven DO; Nathan John Lee BS; Javier Z Guzman BS; John I Shin BS; John M. Caridi MD; Samuel K Cho

    Study Design:

    Subject Category:

    Meeting: Congress of Neurological Surgeons 2015 Annual Meeting

    Introduction: Gender may have an effect on outcomes. Large scale studies examining the effect of gender on lumbar fusion outcomes have not been performed to date.

    Methods: Adults (> 18 years) undergoing lumbar spinal fusion from 2005-2012 were identified using the Current Procedural Terminology (CPT) codes in the ACS NSQIP database. Patients were divided by gender. Baseline, operative, and outcomes data were compared in bivariate fashion. Univariate and multivariate analyses were performed to assess the impact of gender on 30-day postoperative complications and mortality.

    Results: 6,094 patients were identified, of which 55.1% were women. Male patients were younger (58.9 vs 60.6, p<0.0001), had lower rates of obesity (45.1% vs 48.7%, p=0.005), however males had increased likelihood to consume greater than two drinks per day in the two weeks prior to admission (5.52% vs 1.67%, p<0.0001) and higher cardiac comorbidities (59.74% to 57.1%, p=0.036), peripheral vascular disease (1.61% to 0.61%, p=0.0001). Intraoperatively, males had increased operative time more than four hours (36.6% vs 30.1%, p<0.0001) and higher rate of complications (1.02% vs 0.54%, p=0.029). In the postoperative period, females had higher rates of any complication (20.7% vs 16.7%, p<0.0001), higher rates of requiring blood transfusion (16.4% vs 13.1%, p=0.005), increased rates of urinary tract infection (2.86% vs 1.35%, p<0.0001), but lower rates of death (0.09% vs 0.37%, p=0.02). Length of stay, return to the operating room, unplanned reoperation, and unplanned readmissions were not statistically different between genders. On multivariate analysis, females had higher postoperative morbidity (Odds Ratio 1.329, p<0.00) but lower mortality (Odds Ratio 0.244, p=0.043). The increased rate of intraoperative complications in males was not statistically significant on multivariate analysis.

    Conclusions: In evaluating gender differences on lumbar spinal fusion, thirty-day morbidity was higher in females but mortality was higher in males.

    Patient Care: Knowledge of the role of gender in postoperative morbidity and mortality in lumbar spine surgery can enhance postoperative patient care.

    Learning Objectives: The objective of this study was to assess the effect of gender on 30-day outcomes after lumbar spinal fusion using a large national database.


We use cookies to improve the performance of our site, to analyze the traffic to our site, and to personalize your experience of the site. You can control cookies through your browser settings. Please find more information on the cookies used on our site. Privacy Policy