J Korean Neurosurg Soc.  2020 Nov;63(6):730-737. 10.3340/jkns.2020.0007.

The Influence of Comorbidities on Reoperations Following Primary Surgery of Lumbar Degenerative Diseases : A Nationwide Population-Based Retrospective Cohort Study from 2009–2016

• Park HK
• Park SY
• Lee PH
• Park HR
• Park SQ
• Cho SJ
• Chang JC

• KMID: 2508603
• DOI: http://doi.org/10.3340/jkns.2020.0007

Abstract

Objective
: Spinal degeneration is a progressive disease, worsening over time. Lumbar degenerative disease (LDD) is a major spinal disease in elderly patients. Surgical treatment is considered for medically intractable patients with LDD and reoperation after primary surgery is not uncommon. The surgical outcome is occasionally unpredictable because of comorbidities. In the present study, the relationship between comorbidities and the incidence of reoperation for LDD over time was determined.
Methods
: The claims data of the health insurance national database were used to identify a cohort of patients who underwent spinal surgery for LDD in 2009. The patients were followed up until 2016. Medical comorbidity was assessed according to the Charlson comorbidity index (CCI). Cox proportional hazard regression modeling was used to identify significant differences in sex, surgery, age, causative disease, and comorbidity.
Results
: The study cohort included 78241 patients; 10328 patients (13.2%) underwent reoperation during the observation period. The reoperation rate was statistically higher (p<0.01) in males, patients 55–74 years and 65–74 years of age, and patients with decompression or discectomy. Significant association was found between increasing reoperation rate and CCI score (p<0.01). Based on multivariate analysis of comorbidities, the significantly higher reoperation rates were observed in patients with peripheral vascular disease, pulmonary lung disease, peptic ulcer, diabetes, and diabetes complications (p<0.01).
Conclusion
: The study results indicate the reoperation rate for LDD is associated with patient comorbidities. The comorbidities identified in this study could be helpful in future LDD studies.

Keyword

National health insurance; Lumbar vertebrae; Degenerative disease; Surgery; Comorbidity

Figure

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  Fig. 1. Kaplan-Meier plot of 1.00 cumulative reoperation for lumbar degenerative disease.

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  Fig. 2. Kaplan-Meier plot based on Charlson Comorbidity Index group for reoperation. HR : hazard ratio, CI : confidence interval.

Reference

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