Neurocognition in Pediatric Temporal Lobe Tumor-Related Epilepsy

Tumor-related epilepsy is a common and understudied neurological comorbidity among pediatric temporal lobe tumor patients that poses risk for neurocognitive impairment (NCI). Forty-one youth with either TLT+ (n = 23) or nonneoplastic temporal lobe epilepsy (n = 18) ages 6-20 years completed routine neuropsychological evaluations. Rates of NCI were similar across groups; however, NCI was more common in nonneoplastic participants on a task of phonemic fluency, p = .047. Younger age of seizure onset and greater number of antiseizure medications were associated with NCI among TLT+ participants only. Preliminary findings suggest separate prognostic models of cognitive outcomes between TLT+ and nonneoplastic epilepsy populations may be needed.

Insurance Disparities in Patient Outcomes and Healthcare Resource Utilization Following Neonatal Intraventricular Hemorrhage

BACKGROUND

Within the field of pediatric neurosurgery, insurance status has been shown to be associated with surgical delay, longer time to referral, and longer hospitalization in epilepsy treatment, myelomeningocele repair, and spasticity surgery.1,2 The aim of this study was to investigate the association of insurance status with inpatient adverse events (AEs), length of stay (LOS), and costs for newborns diagnosed with intraventricular hemorrhage (IVH).

METHODS

A retrospective cohort study was performed using the 2016-2019 National Inpatient Sample database. Patients with a primary diagnosis of intraventricular hemorrhage were identified using ICD-10-CM diagnostic and procedural codes. Patients were categorized based on insurance status: Medicaid or Private Insurance (PI). Multivariate logistic regression analyses were used to identify the impact of insurance status on extended LOS (defined as >75th percentile of LOS) and exorbitant cost (defined as >75th percentile of cost).

RESULTS

Demographics differed significantly between groups, with the majority of newborns in the PI cohort being White (Medicaid: 35.8% vs. PI: 60.3%, P < 0.001) and the majority of Medicaid patients being in the 0-25th quartile of household income (Medicaid: 40.9% vs. PI: 12.9%, P < 0.001). While insurance status was not independently associated with increased odds of extended LOS or exorbitant cost, Medicaid patients had a greater mean LOS and total cost of admission than PI patients.

CONCLUSIONS

Demographic characteristics, mean LOS, and mean total cost differed significantly between Medicaid and PI patients, indicating potential disparities based on insurance status. However, insurance status was not independently associated with increased healthcare utilization, necessitating further research in this area of study.

Timing of Alveolar Bone Graft and Barriers to Care

OBJECTIVE

The current standard timing for alveolar bone grafting (ABG) occurs during mixed dentition, typically between the ages of six and twelve. A delay in receiving this operation is associated with an increase in graft loss and an overall thinner maxilla. This study aims to determine whether socioeconomic barriers are associated with a delay in timely ABG.

DESIGN

A retrospective analysis of patients who received ABG at our institution since 2012. Patient demographics, cleft classifications, operative details, and surgical dates were examined. A logistic regression model was created using socioeconomic variables to predict patients receiving delayed ABG. Significant variables were then included in a backwards selection logistic regression, followed by a final analysis of maximum likelihood estimates.

SETTING

Single-institution, primary cleft care center.

PATIENTS

202 patients with cleft palates who underwent ABG.

INTERVENTIONS

ABG.

MAIN OUTCOME MEASURES

Timing in which patients received ABG: standard (6-12 years) and delayed (>12 years).

RESULTS

Female sex was a protective factor in the timing of ABG in our initial univariate analysis (OR = 0.44; p  =  .015). Socioeconomic factors resulting in delayed presentation for ABG include median income (OR = 1.0; p  =  .018) and public insurance status (OR = 3.75; p < .001). Median income, sex, and driving distance to the cleft clinic were not significant following backward elimination, however, private insurance status remained significant (OR = 3.71; p  =  .0001).

CONCLUSION

Patients with public insurance are approximately 3.75 times more likely to receive ABG during permanent dentition. Multidisciplinary teams should work closely with patients on public insurance to ensure timely delivery of ABG.Level of Evidence III, Retrospective.

Socioeconomic Disparities Affecting the Presentation and Outcomes in Pediatric Subdural Empyema Patients

BACKGROUND AND OBJECTIVES

Pediatric subdural empyemas (SDE) carry significant morbidity and mortality, and prompt diagnosis and treatment are essential to ensure optimal outcomes. Nonclinical factors affect presentation, time to diagnosis, and outcomes in several neurosurgical conditions and are potential causes of delay in presentation and treatment for patients with SDE. To evaluate whether socioeconomic status, race, and insurance status affect presentation, time to diagnosis, and outcomes for children with subdural empyema.

METHODS

We conducted a retrospective cohort study with patients diagnosed with SDE between 2005 and 2020 at our institution. Information regarding demographics (age, sex, zip code, insurance status, race/ethnicity) and presentation (symptoms, number of prior visits, duration of symptoms) was collected. Outcome measures included mortality, postoperative complications, length of stay, and discharge disposition.

RESULTS

42 patients were diagnosed with SDE with a mean age of 9.5 years. Most (85.7%) (n = 36) were male ( P = .0004), and a majority, 28/42 (66.7%), were African American ( P < .0001). There was no significant difference in socioeconomic status based on zip codes, although a significantly higher number of patients were on public insurance ( P = .015). African American patients had a significantly longer duration of symptoms than their Caucasian counterparts (8.4 days vs 1.8 days P = .0316). In total, 41/42 underwent surgery for the SDE, most within 24 hours of initial neurosurgical evaluation. There were no significant differences in the average length of stay. The average length of antibiotic duration was 57.2 days and was similar for all patients. There were no significant differences in discharge disposition based on any of the factors identified with most of the patients (52.4%) being discharged to home. There was 1 mortality (2.4%).

CONCLUSION

Although there were no differences in outcomes based on nonclinical factors, African American men on public insurance bear a disproportionately high burden of SDE. Further investigation into the causes of this is warranted.

Impact of insurance status, hospital ownership type, and children's hospital designation on outcomes for pediatric neurosurgery patients following spasticity procedures in the USA

PURPOSE

This study aims to examine the relationship between insurance status, hospital ownership type, and children's hospital designation with outcomes for pediatric patients undergoing neurosurgical treatment for spasticity.

METHODS

This retrospective cohort study utilized the Healthcare Cost and Utilization Project Kids' Inpatient Database and included 11,916 pediatric patients (≤ 17 years of age) who underwent neurosurgical treatment for spasticity between 2006 and 2012 using ICD-9-CM procedure codes.

RESULTS

Uninsured patients had a significantly shorter hospital length of stay compared to Medicaid patients (-1.42 days, P = 0.030) as did privately insured patients (-0.74 days; P = 0.035). Discharge disposition and inpatient mortality rate were not associated with insurance status. There were no significant associations with hospital ownership type. Free-standing children's hospitals retained patients significantly longer compared to non-children's hospitals (+1.48 days; P = 0.012) and had a significantly higher likelihood of favorable discharge disposition (P = 0.004). Mortality rate was not associated with children's hospital designation.

CONCLUSION

Pediatric patients undergoing neurosurgical treatment for spasticity were more likely to stay in the hospital longer if they were insured by Medicaid or treated in a free-standing children's hospital. In addition, patients in free standing children's hospitals were more likely to be discharged with a favorable disposition.

Referral practices for epilepsy surgery in pediatric patients: A North American Study

OBJECTIVE

Patients with epilepsy who do not respond to two trials of appropriate antiepileptic drugs are considered to have drug-resistant epilepsy (DRE). The International League Against Epilepsy recommends patients with DRE be referred for surgical evaluation; however, prior literature suggests this is an underutilized intervention, especially in the pediatric setting. This study captures practices of North American pediatric neurologists regarding the management of DRE and factors that may promote or limit referrals for epilepsy surgical evaluation.

METHODS

A REDCap survey was distributed via the Child Neurology Society mailing list to pediatric neurologists practicing in North America. Ethics approval from the Children's Hospital of Eastern Ontario Research Ethics Board was granted prior to the start of data collection.

RESULTS

Ninety-eight responses were included in the analysis; 77% of participants currently practice in the United States; 73.5% of respondents reported they would refer a patient for surgical consultation after two failed medications. Of all potential predictors tested in a binary logistic regression model, only annual referral volume predicted whether participants refer patients after three or more failed medications. Centers with high referral volume were 37% more likely to adhere to the guideline of referral after two failed medications.

SIGNIFICANCE

Pediatric neurologists demonstrate fair knowledge of formal recommendations to refer patients for surgical evaluation after two failed medication trials, although referral rates remain unacceptably low. Participants continue to report that they would not refer patients with generalized electroencephalographic findings for surgical evaluation; this should continue to be addressed. Other modifiable factors reported, especially family perceptions of epilepsy surgery, should be prioritized when developing tools to enhance effective referrals and increase utilization of epilepsy surgery in the management of pediatric DRE.

Systematic Review of Racial, Socioeconomic, and Insurance Status Disparities in the Treatment of Pediatric Neurosurgical Diseases in the United States

BACKGROUND

Increasing light is being shed on how race, insurance, and socioeconomic status (SES) may be related to outcomes from disease in the United States. To better understand the impact of these health care disparities in pediatric neurosurgery, we performed a systematic review of the literature.

METHODS

We conducted a systematic review using PRISMA guidelines and MeSH terms involving neurosurgical conditions and racial, ethnic, and SES disparities. Three independent reviewers screened articles and analyzed texts selected for full analysis.

RESULTS

Thirty-eight studies were included in the final analysis, of which all but 2 were retrospective database reviews. Thirty-four studies analyzed race, 22 analyzed insurance status, and 13 analyzed SES/income. Overall, nonwhite patients, patients with public insurance, and patients from lower SES were shown to have reduced access to treatment and greater rates of adverse outcomes. Nonwhite patients were more likely to present at an older age with more severe disease, less likely to undergo surgery at a high-volume surgical center, and more likely to experience postoperative morbidity and mortality. Underinsured and publicly insured patients were more likely to experience delay in surgical referral, less likely to undergo surgical treatment, and more likely to experience inpatient mortality.

CONCLUSIONS

Health care disparities are present within multiple populations of patients receiving pediatric neurosurgical care. This review highlights the need for continued investigation into identifying and addressing health care disparities in pediatric neurosurgery patients.

Underrepresented Populations in Pediatric Epilepsy Surgery

As awareness of pediatric epilepsy increases, accompanied by advancements in technology and research, it is important to identify certain types of patients that are overlooked for surgical management of epilepsy. Identifying these populations will allow us to study and elucidate the factors contributing to the underutilization and/or delayed application of surgical interventions. Demographically, African-American and Hispanic patients, as well as patients of certain Asian ethnicities, have relatively lower rates of undergoing epilepsy surgery than non-Hispanic and white patients. Among patients with epilepsy, those with higher odds of seizure-freedom following surgery are more likely to be referred for surgical evaluation by their neurologists, with the most common diagnosis being lesional focal epilepsy. However, patients with multifocal or generalized epilepsy, genetic etiologies, or normal (non-lesional) brain magnetic resonance imaging (MRI) are less likely be to referred for evaluation for resective surgery. With an increasing number of high-quality imaging modalities to help localize the epileptogenic zone as well as new techniques for both curative and palliative epilepsy surgery, there are very few populations of patients and/or types of epilepsy that should be precluded from evaluation to determine the suitability of epilepsy surgery. Ultimately, a clearer understanding of the populations who are underrepresented among those considered for epilepsy surgery, coupled with further study of the underlying reasons for this trend, will lead to less disparity in access to this critical treatment among patients with epilepsy.

Association of hospital characteristics and insurance type with quality outcomes for pediatric craniosynostosis patients

OBJECTIVE

Our study aimed to assess the association of insurance status and hospital ownership type with inpatient hospital outcomes among a nationally representative population of pediatric craniosynostosis neurosurgery patients.

METHODS

This retrospective cohort study utilized data from the Healthcare Cost and Utilization Project 2006-2012 Kids Inpatient Database. Primary outcomes including length of stay, and favorable discharge disposition were assessed for all pediatric neurosurgery patients who underwent a neurosurgical procedure for craniosynostosis.

RESULTS

Pediatric neurosurgery patients with private insurance had a reduced length of stay of 0.75 days compared to patients insured by Medicaid. Compared to private, investor-owned hospitals, Government, non-federal, and private, not for profit hospital ownership types were associated with an increased length of stay greater than 1 day.

CONCLUSIONS

Our finding of increased LOS for craniosynostosis patients seen in other hospital ownership types compared to those seen in private, investor-owned hospitals is indicative of the possible role that financial incentives may play in influencing quality metrics. Although we observed a shortened LOS for privately-insured patients compared to patients insured by Medicaid, we found no difference in favorable discharge disposition based on insurance status. This suggests that patients with shorter LOS have similar outcomes and are likely not being prematurely discharged.

Addressing the epilepsy surgery gap: Impact of community/tertiary epilepsy center collaboration

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Collaboration agreements can improve epilepsy surgery referral volumes.

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Standardized referral pathways may help address epilepsy surgery gap.

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Internal and external process changes can improve referral process.

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Sociodemographic variables continue to influence referral completion.

To assess whether a formal collaboration between a non-surgical, community epilepsy center and a surgical, tertiary-care epilepsy center can improve patient progress throughout the pre-surgical referral process, and to elucidate predictors of referral completion among inter-center referrals.

The inter-center referral process was tracked, and the number of patients completing surgical conference (primary outcome) and epilepsy surgery at the tertiary center were collected and compared in the 45-month immediate pre/post-collaboration periods. Demographic and clinical variables were collected on post-collaboration inter-center patient referrals to explore factors associated with completion of the referral process.

Compared to the pre-collaboration period, the proportion of tertiary center epilepsy surgery conference patients referred from the community epilepsy center increased from 3/88 to 14/113 (263% increase, p = .01) during the post-collaboration period. The proportion of patients completing surgery via the community to tertiary referral process increased from 2/63 pre-collaboration to 8/71 post-collaboration (254% increase, p = .04). Referral completion was associated with higher seizure frequency, shorter travel distance, private insurance status and positive employment status (p < 0.05).

Collaboration agreements between community and tertiary-care epilepsy centers may improve patient completion of the epilepsy surgery referral process. Implementation of similar programs at other centers may be beneficial in reducing the epilepsy surgery gap.

The Effectiveness of Medical and Surgical Treatment for Children With Refractory Epilepsy

BACKGROUND

Pediatric refractory epilepsy affects quality of life, clinical disability, and healthcare costs for patients and families.

OBJECTIVE

To show the impact of surgical treatment for pediatric epilepsy on healthcare utilization compared to medically treated pediatric epilepsy over 5 yr.

METHODS

The Pediatric Health Information System database was used to conduct a cohort study using 5 published algorithms. Refractory epilepsy patients treated with antiepileptic medications (AEDs) only or AEDs plus epilepsy surgery between 1/1/2008 and 12/31/2014 were included. Healthcare utilization following the index date at 2 and 5 yr including inpatient, emergency department (ED), and all epilepsy-related visits were evaluated. The propensity scores (PS) method was used to match surgically and medically treated patients. PS. SAS® 9.4 and Stata 14.0 were used for data management and statistical analysis.

RESULTS

A total of 2106 (17.1%) and 10186 (82.9%) were surgically and medically treated. A total of 4050 matched cases, 2025 per each treated group, were included. Compared to medically treated patients, utilization was reduced in the surgical group: at 2 and 5 yr postindex date, there was a reduction of 36% to 37% of inpatient visits and 47% to 50% of ED visits. The total number (inpatient, ED, ambulatory visits) of epilepsy-associated visits were reduced by 39% to 43% in the surgical group compared to the medically treated group. In those who had surgery, the average reduction in AEDs was 16% at 2 and 5 yr after treatment.

CONCLUSION

Patients with refractory epilepsy treated with surgery had significant reductions in healthcare utilization compared with patients treated only with medications.

Insurance transitions and healthcare utilization for children with refractory epilepsy

OBJECTIVES

The objective of the study is to investigate the association between insurance transitions and healthcare utilization among children with refractory epilepsy.

METHODS

We applied published algorithms to identify the study cohort of children with a diagnosis of refractory epilepsy who were treated between 10/1/2013 and 9/30/2014 at 36 children's hospitals in the United States. Insurance transition was defined as having any change in the type of primary payer from the first date of diagnosis to the date of the last visit at the same hospital. Univariate and multilevel multivariable analytical methods were used in the study.

RESULTS

Among 3488 children hospitalized with refractory epilepsy, rates of insurance transitions at 1, 2, and 5 years of refractory epilepsy diagnosis were 8.1%, 14%, and 29.9%, respectively. Patients whose primary payer at diagnosis was Private or Others were more likely to experience insurance transitions than patients whose primary payer was Medicaid. Younger children were associated with a higher risk of insurance transitions than older children. The high intensity of insurance transitions was associated with a higher number of emergency department and inpatient visits.

CONCLUSIONS

Insurance transitions interrupted the continuity of medical care for children with refractory epilepsy and were associated with more frequent hospitalizations and emergency department visits, which then translated to higher healthcare costs. Medicaid provided stable insurance coverage and is critically important for these patients and should be the main focus for policies aiming to minimize insurance transitions and optimize healthcare delivery.

Follow-up and Time to Treatment in an Urban Cohort of Children with Sleep-Disordered Breathing

Objective To evaluate follow-up and timing of sleep-disordered breathing diagnosis and treatment in urban children referred from primary care. Study Design Retrospective longitudinal cohort analysis. Setting Tertiary health system. Subjects and Methods Pediatric outpatients with sleep-disordered breathing, referred from primary care for subspecialty appointment or polysomnography in 2014, followed for 2 years. Timing of polysomnography or subspecialty appointments, loss to follow-up, and sleep-disordered breathing severity were main outcomes. Chi-square and t-test identified differences in children referred for polysomnography, surgery, and loss to follow-up. Logistic regression identified predictors of loss to follow-up. Days to polysomnography or surgery were evaluated using the Kaplan-Meier estimator, with Cox regression comparing estimates by polysomnography receipt and disease severity. Results Of 216 children, 188 (87%) had public insurance. Half (109 [50%]) were lost to follow-up after primary care referral. More children were lost to follow-up when referred for polysomnography (50 [76%]) compared with subspecialty evaluation (35 [32%]; P < .001). Children referred to both polysomnography and subspecialty were more likely to be lost to follow-up (odds ratio = 2.73, 95% confidence interval = 1.29-5.78; P = .009). For children who obtained polysomnography, an asymmetric distribution of obstructive sleep apnea severity was not observed ( P = .152). Median time to polysomnography and surgery was 75 and 226 days, respectively. Obstructive sleep apnea severity did not influence time to surgery ( P = .410). Conclusion In this urban population, half of the children referred for sleep-disordered breathing evaluation are lost to follow-up from primary care. Obstructive sleep apnea severity did not predict follow-up or timeliness of treatment. These findings suggest social determinants may pose barriers to care in addition to the clinical burden of sleep-disordered breathing.

Potential delays in referral and assessment for epilepsy surgery in children with drug-resistant, early-onset epilepsy

OBJECTIVE

To study potential delays in epilepsy surgery in children with drug-resistant epilepsy (DRE) of early-onset.

METHODS

Medical records were reviewed from 87 children with DRE and seizure onset before age 3 years who underwent epilepsy surgery between 2006 and 2015. Information was obtained about each child's epilepsy, treatment and specific time points in management. Time intervals along diagnostic, investigative, treatment and referral pathways were calculated.

RESULTS

Median ages at seizure onset, when seen in the epilepsy surgery program and surgery were 5.9 (IQR 10), 19 (IQR 29) and 36 (IQR 67) months; the median delay from seizure onset to surgery was 30 (IQR 67) months. Most children were promptly diagnosed, treated, investigated and seen by a pediatric neurologist. Focal abnormalities were reported on initial EEGs and MRIs in most children, and DRE developed within a median of 6.3 months from commencement of medication. There were median durations of 6.2 months between seeing a neurologist and being seen in the epilepsy surgery program, and then 6.1 months in determining surgical candidacy. Median durations from potential indications for a surgical evaluation to agreed surgical candidacy were 10 (DRE), 12 (focal MRI) and 17 (focal EEG) months. Children received a median of six antiepileptic drugs prior to surgery. Median interval from agreed surgical candidacy to surgery was only 3 months. There were longer durations from seizure onset to surgery in children needing PET (p = 0.001) and in children with seizure-free periods (p < 0.001), and shorter durations in children with a history of infantile spasms (p = 0.01).

SIGNIFICANCE

Delays in referral of children for epilepsy surgery are reported. Delays in assessment may be specific to centralized children's hospitals in public health systems.

Delay in pediatric epilepsy surgery: A caregiver's perspective

The timing of epilepsy surgery is complex, and there is not a structured pathway to help families decide whether to continue medical management or pursue surgical treatment. We surveyed caregivers of pediatric epilepsy surgery patients. Fifty-eight respondents answered the majority of questions. Thirty caregivers wished their child had undergone epilepsy surgery earlier compared with twenty who felt surgery was done at the appropriate time, and eight were unsure. In retrospect, caregivers who wished their child's surgery had been performed sooner had a significantly longer duration of epilepsy prior to the surgery [44.1±71.7 (months±standard deviation (SD), N=27)], compared with those who felt content with the timing of the surgery [12.8±14.1 (months±SD, N=20), p=0.0034]. Caregivers were willing to accept a lower likelihood of seizure freedom than their physician reported was likely. Most caregivers were willing to accept deficits in all domains surveyed; caregivers had high acceptance of motor deficits, cognitive deficits, behavioral change, and language loss. Future studies are needed to focus on how to improve the education of caregivers and neurologists about the benefits and risks of epilepsy surgery and accelerate the pipeline to epilepsy surgery to improve caregiver satisfaction.

Surgical Management of Pediatric Epilepsy: Decision-Making and Outcomes

First-line treatment for epilepsy is antiepileptic drug and requires an interdisciplinary approach and enduring commitment and adherence from the patient and family for successful outcome. Despite adherence to antiepileptic drugs, refractory epilepsy occurs in approximately 30% of children with epilepsy, and surgical treatment is an important intervention to consider. Surgical management of pediatric epilepsy is highly effective in selected patients with refractory epilepsy; however, an evidence-based protocol, including best methods of presurgical imaging assessments, and neurodevelopmental and/or behavioral health assessments, is not currently available for clinicians. Surgical treatment of epilepsy can be critical to avoid negative outcomes in functional, cognitive, and behavioral health status. Furthermore, it is often the only method to achieve seizure freedom in refractory epilepsy. Although a large literature base can be found for adults with refractory epilepsy undergoing surgical treatment, less is known about how surgical management affects outcomes in children with epilepsy. The purpose of the review was fourfold: (1) to evaluate the available literature regarding presurgical assessment and postsurgical outcomes in children with medically refractory epilepsy, (2) to identify gaps in our knowledge of surgical treatment and its outcomes in children with epilepsy, (3) to pose questions for further research, and (4) to advocate for a more unified presurgical evaluation protocol including earlier referral for surgical candidacy of pediatric patients with refractory epilepsy. Despite its effectiveness, epilepsy surgery remains an underutilized but evidence-based approach that could lead to positive short- and long-term outcomes for children with refractory epilepsy.

The Impact of Insurance, Race, and Ethnicity on Age at Surgical Intervention among Children with Nonsyndromic Craniosynostosis

OBJECTIVE

To examine the impact of demographic factors, including insurance type, family income, and race/ethnicity, on patient age at the time of surgical intervention for craniosynostosis surgery in the US.

STUDY DESIGN

The Kids' Inpatient Database was queried for admissions of children younger than 3 years of age undergoing craniosynostosis surgery in 2009. Descriptive data regarding age at surgery for various substrata are reported. Multivariate regression was used to evaluate the effect of patient and hospital characteristics on the age at surgery.

RESULTS

Children with private insurance were, on average, 6.8 months of age (95% CI 6.2-7.5) at the time of surgery; children with Medicaid were 9.1 months old (95% CI 8.4-9.8). White children received surgery at mean age of 7.2 months (95% CI 6.5-8.0) and black and Hispanic children at a mean age of 9.1 months (95% CI 8.2-10.1). Multivariate regression analysis found Medicaid insurance (beta coefficient [B]=1.93, P<.001), black or Hispanic race/ethnicity (B=1.34, P=.022), and having 2 or more chronic conditions (B=2.86, P<.001) to be significant independent predictors of older age at surgery.

CONCLUSION

Public insurance and nonwhite race/Hispanic ethnicity were statistically significant predictors for older age at surgery, adjusted for sex, zip code median family income, year, and hospital factors such as size, type, region, and teaching status. Further research into these disparities is warranted.

Trends in outcomes, complications, and hospitalization costs for hemispherectomy in the United States for the years 2000-2009

OBJECTIVE

Hemispherectomy is an established surgical treatment for carefully selected pediatric patients with intractable epilepsy. Published perioperative data report low mortality rates and seizure reduction rates of 50-89%. This study investigates trends in the demographics, hospital utilization, and in-hospital complication rates of patients undergoing hemispherectomy over the past decade in the United States, using the nationally representative Kids' Inpatient Database (KID).

METHODS

The KID was queried for all discharges with the International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) procedure code for hemispherectomy in the years 2000, 2003, 2006, and 2009. The patient cohorts from these four time points were compared, analyzing differences in demographic data, insurance and payer status, total cost, length of stay, in-hospital mortality, and complications. National estimates and 95% confidence intervals are reported given the weighted sample design of KID.

RESULTS

This study identified an estimated total of 552 hospital admissions for hemispherectomy surgery during the years studied in this cohort. The incidence of this procedure increased from 1.2/100,000 admissions in 2000 to 2.2/100,000 in 2009 (p=0.05). Mean age was 6.7 years (range 0-20). There were no significant changes in demographics (age, gender, or race), hospital descriptors (size or type), insurance type, or zip code income quartile. There was a significant increase in total cost, from $42,807 in 2003 to $57,443 in 2009 (p=0.015) (adjusted to 2009 dollars). There were no trends in postoperative complications. In-hospital mortality occurred in five subjects (0.9%). Ventricular shunt placement during hemispherectomy hospitalizations increased over time from 6.7% to 16.5% (p=0.056). Hospitals that performed two or more hemispherectomies yearly had a significantly decreased incidence of in-hospital mortality (odds ratio [OR] 0.08, p=0.04) and an increased incidence of blood transfusion (OR 3.7, p=0.01) compared to hospitals that performed 0-1 procedures a year.

SIGNIFICANCE

Hemispherectomy procedures increased slightly in frequency over the past decade, with no change in demographic characteristics of the patients over time. Rates of mortality and perioperative complications remained low. Total costs have increased significantly over time. In-hospital mortality was lower in higher volume hospitals.

Social determinants of health in epilepsy

Social factors have been identified as key drivers of epilepsy care, outcomes, and disparities, but there is a limited understanding of what these factors are and how they translate into disparities. This targeted review provides an overview of the social determinants of health framework and applies this perspective to the literature about social and psychosocial factors in epilepsy; a social determinants of health--epilepsy model is proposed. The key social determinants of health in epilepsy include socioeconomic status, race/ethnicity, age, and gender. For example, low socioeconomic status and minority status have been associated with a higher risk of epilepsy, more hospitalizations and emergency room visits (versus neurology services), antiepileptic drug nonadherence, and a lower rate of epilepsy surgery. Such differences in care/treatment and outcomes translate into health disparities, many of which are considered unjust (inequitable) and modifiable through social action. Other social determinants of health include structural and sociocultural contextual conditions (e.g., health economy, policy, and social stigma/discrimination) and mediating mechanisms including material (e.g., housing), behavioral/biological (e.g., adherence), psychosocial (e.g., perceived stigma), and health system (e.g., access) factors. There are complex relationships among social determinants of health in epilepsy, which remain poorly understood and hamper efforts to address and eliminate disparities in epilepsy care and outcomes. Further empirical work grounded in sound theory and robust methodologies is needed to identify points of intervention and design effective and socially acceptable solutions to any pervasive disparities in epilepsy.