RESUMO
PURPOSE: Adolescent idiopathic scoliosis (AIS) is a common spinal deformity affecting pediatric patients, with up to 10% requiring surgical intervention. Studies have shown disparities in these patients associated with race, ethnicity, and insurance type, but there is limited information on disparities that exist based on geographical parameters. In this study, we aim to explore the disparities in the care for AIS by looking at differences in the rates of readmission, infection, and revision between patients residing in rural and urban environments. METHODS: This is a retrospective cohort study utilizing the Pediatric Health Information System. Pediatric patients that underwent posterior spinal fusion (PSF) for AIS from October 2015 to July 2022 were included. Diagnoses and procedures were identified based on ICD-10 codes and internal tools built into the database. Descriptive statistics were used to summarize the data, including demographics, infection rates, readmission rates, and revision rates. T tests, Chi-squared tests, and logistic regression were used to assess differences between the rural and urban populations. We utilized STATA/SE 15.1 for all data analysis. RESULTS: 15,318 patients were included in the final cohort. Demographics and baseline characteristics were similar between the rural and urban patients, although more rural patients used Medicaid over commercial insurance (41.5% vs. 32.7%, p < 0.01), median household income was lower in rural patients (p < 0.01), and there was a higher proportion of Hispanic patients in the urban patient cohort (13.9% vs. 6.4%, p < 0.01). Complication rates were not significantly different between the urban and rural patient cohorts, although rural patients did have a significantly higher 90-day readmission rate (7.3% vs. 6.1%, p = 0.03) and higher rates of instrumentation removal (7.7% vs. 4.9%, p = 0.01). CONCLUSIONS: The surgical outcomes between rural and urban pediatric AIS patients undergoing PSF are comparable, although 90-day readmission rates and rates of instrumentation removal were higher in rural patients. Insurance status is likely a significant driver for the differences observed in this study. Future research is needed to better understand the reasons for these differences and to develop strategies to improve outcomes. LEVEL OF EVIDENCE: Retrospective cohort study, Level III.
