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Dual-eligible beneficiaries, individuals with both Medicare and Medicaid coverage, represent a high-cost and vulnerable population; however, literature regarding outcomes is sparse. We characterized outcomes in dual-eligible beneficiaries treated for aneurysmal subarachnoid hemorrhage (aSAH) compared to Medicare only, Medicaid only, private insurance, and self-pay. A 10-year cross-sectional study of the National Inpatient Sample was conducted. Adult aSAH emergency admissions treated by neurosurgical clipping or endovascular coiling were included. Multivariable regression was used to adjust for confounders. A total of 57,666 patients met inclusion criteria. Dual-eligibles comprised 2.8% of admissions and were on average younger (62.4 years) than Medicare (70.0 years), older than all other groups, and had higher mean National Inpatient Sample-Subarachnoid Hemorrhage Severity Scores than all other groups (p ≤ 0.001). Among patients treated by clipping, dual-eligibles were less often discharged to home compared to Medicare (adjusted odds ratio (aOR) = 0.51, 95% CI = 0.30-0.87, p < 0.05) and all other insurance groups, p < 0.01. Likewise, those who received coiling were less often discharged to home compared to Medicaid (aOR = 0.41, 95% CI = 0.23-0.73), private (aOR = 0.42, 95% CI = 0.23-0.76) and self-pay patients (aOR = 0.24, 95% CI = 0.12-0.46). They also had increased odds of poor National Inpatient Sample-Subarachnoid Hemorrhage Outcome Measures compared to Medicaid, private, and self-pay patients, all p < 0.05. There were no differences in inpatient mortality or total complications. In conclusion, dual-eligible patients had higher aSAH severity scores, less often discharged home, and among patients who received coiling, dual-eligibles had increased odds of poor outcome. Dual-eligible patients with aSAH represent a vulnerable population that may benefit from targeted clinical and public policy initiatives., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021 Elsevier Ltd. All rights reserved.)

Sepsis is a life-threatening condition resulting from systemic infection, with mortality rates approaching 30%. Most neurological surgeries are now performed electively, which permits medical optimization preoperatively. We performed a retrospective cohort analysis of 122,466 adult elective neurosurgical patients from 2012 to 2018 in the National Surgical Quality Improvement Program database. To select for a medically optimized population, patients were included if they arrived from home on the day of surgery, were not pregnant or puerperium, and had no documented evidence of preexisting infection. We analyzed demographic, comorbidity, and operative information; performed multivariate logistic regression to explore factors predictive of postoperative sepsis; and evaluated outcomes for patients who developed sepsis. Overall, 0.87% of patients developed postoperative sepsis (n = 1,067). The rate of sepsis was higher in the cranial subpopulation (1.21%; n = 330) and lower in the spinal subpopulation (0.77%; n = 733). The overall sepsis cohort was older, had more males, was more functionally dependent, had longer operation durations, and had higher rates of medical comorbidities. Minority race and smoking were not associated with sepsis. The sepsis cohort fared worse than the control cohort across all outcome measures, including prolonged length-of-stay (≥90 th percentile), discharge anywhere but home, 30-day readmission, 30-day reoperation, and 30-day mortality. Results for the cranial and spine subpopulations follow similar trends. In summary, sepsis in the elective neurosurgical population is an uncommon but devastating cause of excess morbidity and mortality., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier Ltd. All rights reserved.)