Predictors of long-term quality of life after pediatric epilepsy surgery

A longitudinal cohort study of mediators of health-related quality of life after pediatric epilepsy surgery or medical treatment

OBJECTIVES

The purpose of this longitudinal cohort study was to examine the variables that influence health-related quality of life (HRQOL) after epilepsy surgery in children. We examined whether treatment type (surgical vs medical therapy) and seizure control are related to other variables that have been shown to influence HRQOL, namely depressive symptoms in children with epilepsy or their parents, and the availability of family resources.

METHODS

In total, 265 children with drug-resistant epilepsy were recruited from eight epilepsy centers across Canada at the time of their evaluation for candidacy for epilepsy surgery and were assessed at baseline, 6-month, 1-year, and 2-year follow-up. Parents completed the Quality of Life in Childhood Epilepsy Questionnaire (QOLCE-55) and measures of family resources and depression; children completed depression inventories. Causal mediation analyses using natural effect models were used to evaluate the extent to which the relationship between treatment and HRQOL was explained by seizure control, child and parent depressive symptoms, and family resources.

RESULTS

Overall, 111 children underwent surgery and 154 were treated with medical therapy only. The HRQOL scores of surgical patients were 3.4 points higher (95% confidence interval [CI]: -0.2, 7.0) relative to medical patients at the 2-year follow-up after adjusting for baseline covariates, with 66% of the effect of surgery attributed to seizure control. Child or parent depressive symptoms and family resources had negligible mediation effects between treatment and HRQOL. The effect of seizure control on HRQOL was not mediated by child or parent depressive symptoms, or by family resources.

SIGNIFICANCE

The findings demonstrate that seizure control is on the causal pathway between epilepsy surgery and improved HRQOL in children with drug-resistant epilepsy. However, child and parent depressive symptoms and family resources were not significant mediators. The results highlight the importance of achieving seizure control to improve HRQOL.

Neighborhood disadvantage and health-related quality of life in pediatric epilepsy

INTRODUCTION

While several demographic and epilepsy-specific characteristics are associated with diminished HRQoL in children and adolescents with epilepsy, prior investigations have failed to incorporate and address the influence of broader social contextual factors on functional outcomes. To address this gap, the purpose of the current study was to investigate the role of neighborhood disadvantage on HRQoL, including the extent to which familial and seizure-specific risk factors are impacted.

METHODS

Data included parental ratings on the Quality of Life in Childhood Epilepsy (QOLCE) questionnaire for 135 children and adolescents with epilepsy, and the Area Deprivation Index (ADI) to measure neighborhood disadvantage. Bivariate correlations were conducted to identify significant associations with neighborhood disadvantage, followed by a three-stage hierarchical multiple regression to predict HRQoL. Follow-up binary logistic regressions were used to determine the risk conferred by neighborhood disadvantage on sociodemographic, seizure-specific, and HRQoL factors.

RESULTS

Moderate associations between neighborhood disadvantage and familial factors, including parental psychiatric history and Medicaid insurance, were identified, while disadvantage and greater seizure frequency were marginally associated. Neighborhood disadvantage independently predicted HRQoL, and was the sole significant predictor of HRQoL when familial factors were incorporated. Children with epilepsy living in disadvantaged areas were four times more likely to have diminished HRQoL, five times more likely to live with a parent with a significant psychiatric history, and four times more likely to reside with a family receiving Medicaid insurance.

CONCLUSIONS

These results highlight the importance of identifying high-risk groups, as the cumulative burden of social context, familial factors, and seizure-specific characteristics contribute to lower HRQoL in pediatric epilepsy which disproportionately affects patients from lower-resourced backgrounds. Potentially modifiable factors such as parental psychiatric status exist within the child's environment, emphasizing the importance of a whole-child approach to patient care. Further exploration of disadvantage in this population is needed to better understand these relationships over time.

Trajectory of Health-Related Quality of Life After Pediatric Epilepsy Surgery

Importance

Health-related quality of life (HRQOL) is regarded as a key outcome for evaluating treatment efficacy. However, it is uncertain how HRQOL evolves after epilepsy surgery compared with medical therapy, such as whether it continues to improve over time, improves and then remains stable, or deteriorates after a period of time.

Objective

To assess trajectory of HRQOL over 2 years in children with drug-resistant epilepsy (DRE) treated with surgery compared with medical therapy.

Design, Setting, and Participants

Prospective cohort study assessing HRQOL longitudinally over 2 years. Participants were children recruited from 8 epilepsy centers in Canada from 2014 to 2019 with suspected DRE aged 4 to 18 years who were evaluated for surgery. Data were analyzed from May 2014 to December 2021.

Exposures

Epilepsy surgery or medical therapy.

Main Outcomes and Measures

HRQOL was measured using the Quality of Life in Childhood Epilepsy Questionnaire (QOLCE)-55. HRQOL and seizure frequency were assessed at baseline, 6-month, 1-year, and 2-year follow-ups. Clinical, parent, and family characteristics were assessed at baseline. A linear mixed model was used to evaluate HRQOL over time, adjusting for baseline clinical, parent, and family characteristics.

Results

There were 111 surgical and 154 medical patients (mean [SD] age at baseline was 11.0 [4.1] years; 118 [45%] were female). At baseline, HRQOL was similar among surgical and medical patients. HRQOL of surgical patients was 3.0 (95% CI, -0.7 to 6.8) points higher at 6-month, 4.9 (95% CI, 0.7 to 9.1) points higher at 1-year, and 5.1 (95% CI, 0.7 to 9.5) points higher at 2-year follow-ups compared with medical patients. Surgical patients experienced greater improvements in social functioning relative to medical patients, but not for cognitive, emotional, and physical functioning. At 2-year follow-up, 72% of surgical patients were seizure-free, compared with 33% of medical patients. Seizure-free patients reported higher HRQOL than those who were not.

Conclusions and Relevance

This study provided evidence on the association between epilepsy surgery and children's HRQOL, with improvement in HRQOL occurring within the first year and remaining stable 2 years after surgery. By demonstrating that surgery improved seizure freedom and HRQOL, which has downstream effects such as better educational attainment, reduced health care resource utilization, and health care cost, these findings suggest that the high costs of surgery are justified, and that improved access to epilepsy surgery is necessary.

Quality of life of children with residual seizures after epileptic resection surgery

Objective

Epilepsy dramatically affects the quality of life (QoL) of children, and resection surgery can improve their QoL by reducing seizures or completely controlling them. Children who have postoperative seizures tend to show a poorer QoL. The aim of the present study was to investigate the QoL of children with seizures after resection surgery and its influencing factors.

Methods

In the present study, we retrospectively reviewed 151 consecutive children who underwent resection surgery. We then divided them into two groups, seizure and seizure-free groups, according to the seizure outcomes 1 year after surgery. Variables were categorized into a number of factor types such as preoperative factors, surgery-related factors, postoperative factors, and family factors. QoL and seizure outcomes more than 3 years after surgery were assessed according to the ILAE seizure outcome classification and the CHEQOL-25 scale.

Results

Forty-three (28.5%) of the 151 children had seizures 1 year after surgery, and two children died during the follow-up period. The mean CHEQOL-25 scale for children with seizures was 63.5 ± 18.2, and 20 (48.8%) patients had poor QoL. Surgery-related factors, such as surgical complications and surgical sequelae, were not statistically associated with QoL. Preoperative language development retardation or language dysfunction [odds ratio (OR) = 29.3, P = 0.012) and postoperative ILAE seizure outcome classification (OR = 1.9, P = 0.045)] were significantly associated with QoL.

Significance

Children with seizures after resection surgery had a relatively poor QoL. Surgery-related factors, such as surgical complications and surgical sequelae, cannot predict the QoL. Preoperative language development retardation or language dysfunction and postoperative ILAE seizure outcome classification were independent predictors of the quality of life (QoL). For children who could not achieve the expected freedom from seizure after surgery, a lower ILAE grade (ILAE 1-3) is also an acceptable outcome since it predicts a higher QoL.

Cognitive outcomes following frontal lobe resection for treatment of epilepsy in children and adolescents

OBJECTIVE

To use reliable change indices (RCIs) developed specifically for pediatric patients with epilepsy to examine cognitive outcomes after frontal lobe resection for pharmacoresistant epilepsy.

METHODS

Forty-one pediatric patients (25 male, Mage = 10 years) completed comprehensive neuropsychological evaluations before and an average of 6.5 months after frontal lobe resections for treatment of epilepsy. Evaluations included tests of intelligence, attention/working memory, processing speed, language, visuospatial skills, executive function, and episodic memory. Practice effect-adjusted RCIs were used to determine clinically significant postoperative cognitive change. Demographic, disease, and surgical variables were examined to identify factors associated with postoperative cognitive decline or improvement.

RESULTS

Within each cognitive domain, there was a large proportion of patients (51-84%) who did not exhibit significant cognitive change. In terms of overall cognitive profile, 44% demonstrated improvement in at least one domain and 69% declined in at least one domain. Postoperative cognitive improvement occurred most commonly in the domain of processing speed, whereas postoperative cognitive decline occurred most frequently in the domain of visuospatial skills. Younger age at surgery was associated with cognitive improvement. Older age at seizure onset and higher baseline cognitive performance were associated with cognitive decline.

SIGNIFICANCE

Approximately 6.5 months after frontal lobe resection, only 15% of our sample showed stable performance across all cognitive domains. Seventeen percent of patients showed improvements without declines, 42% showed declines without improvements, and 27% showed a mix of improvements and declines across different cognitive domains. Age and baseline abilities were associated with postoperative cognitive change on multiple measures. With 1 in 8 children demonstrating postoperative decline across three or more domains, further research is needed to identify factors associated with cognitive decline in order to inform clinical decision-making and patient/family counseling.

Intellectual outcome from 1 to 5 years after epilepsy surgery in 81 children and adolescents: A longitudinal study

OBJECTIVE

This longitudinal study aimed to measure the time course of intellectual changes after pediatric focal resective epilepsy surgery and to identify their predictors.

METHODS

We analyzed a cohort of 81 school-aged children with focal epilepsy and intractable seizures who underwent neurosurgery (focal resection) from 2000 to 2018 in La Timone Hospital (Marseille). Neuropsychological assessments were carried out before and then 1, 2, 3, and 5 years after epilepsy surgery.

RESULTS

Eighty-one patients with a median age at surgery of 13.74 years [4.25] were enrolled. Overall, 45 of the 81 (55%) recruited patients were improved after the surgery on at least one of the five domains of the Wechsler Intelligence Scale. Temporal lobe localization and postoperative seizure freedom were the main prognostic factors impacting intellectual outcome (improvement and decline) after epilepsy surgery. Younger patients at surgery were less likely to have a postoperative IQ decline. Intellectual improvement after epilepsy surgery could be delayed for up to 5 years after surgery and concerned all intellectual domains except the Verbal Comprehension Index (VCI). Intellectual decline after epilepsy surgery occurred mainly during the first two years after the surgery and was reflected in full-scale intelligence quotient (FSIQ) and Working Memory Index (WMI).

CONCLUSIONS

Our study points out that children and adolescents with TLE who achieved freedom from seizure after epilepsy surgery are the leading candidates for achieving postoperative intellectual improvement. This enhancement in intellectual function shows a long time course, whereas intellectual decline is evidenced earlier.

Long-term outcomes of children with drug-resistant epilepsy across multiple cognitive domains

AIM

To simultaneously evaluate long-term outcomes of children with drug-resistant epilepsy (DRE) across multiple cognitive domains and compare the characteristics of participants sharing a similar cognitive profile.

METHOD

Participants were adolescents and young adults (AYAs) diagnosed with DRE in childhood, who completed a comprehensive neuropsychological battery evaluating intelligence, memory, academic, and language skills at the time of surgical candidacy evaluation and at long-term follow-up (4-11y later). Hierarchical k-means clustering identified subgroups of AYAs showing a unique pattern of cognitive functioning in the long-term.

RESULTS

Participants (n=93; mean age 20y 1mo [standard deviation {SD} 4y 6mo]; 36% male) were followed for 7 years (SD 2y 4mo), of whom 65% had undergone resective epilepsy surgery. Two subgroups with unique patterns of cognitive functioning were identified, which could be broadly categorized as 'impaired cognition' (45% of the sample) and 'average cognition' (55% of the sample); the mean z-score across cognitive measures at follow-up was -1.86 (SD 0.62) and -0.23 (SD 0.54) respectively. Surgical and non-surgical patients were similar with respect to seizure control and their long-term cognitive profile. AYAs in the average cognition cluster were more likely to have better cognition at baseline, an older age at epilepsy onset, and better seizure control at follow-up.

INTERPRETATION

The underlying abnormal neural substrate and seizure control were largely associated with long-term outcomes across cognitive domains.

Psychological status after insulo-opercular resection in patients with epilepsy: Depression, anxiety, and quality of life

Insular epilepsy is increasingly recognized in epilepsy surgery centers. Recent studies suggest that resection of an epileptogenic zone that involves the insula as a treatment for drug-resistant seizures is associated with good outcomes in terms of seizure control. However, despite the existing evidence of a role of the insula in emotions and affective information processing, the long-term psychological outcome of patients undergoing these surgeries remain poorly documented. A group of 27 adults (18 women) who underwent an insulo-opercular resection (in combination with a part of the temporal lobe in 10, and of the frontal lobe in 5) as part of epilepsy surgery at our center between 2004 and 2019 completed psychometric questionnaires to assess depression (Beck Depression Inventory - 2nd edition; BDI-II), anxiety (State-Trait Anxiety Inventory, Trait Version; STAI-T), and quality of life (Patient Weighted Quality of Life In Epilepsy; QOLIE-10-P). Scores were compared to those of patients who had standard temporal lobe epilepsy (TLE) surgery with similar socio-demographic and disease characteristics. Seizure control after insular epilepsy surgery was comparable to that observed after TLE surgery, with a majority of patients reporting being seizure free (insular: 63.0%; temporal: 63.2%) or having rare disabling seizures (insular: 7.4%; temporal: 18.4%) at the time of questionnaire completion. Statistical comparisons revealed no significant group difference on scores of depression, anxiety, or quality of life. Hemisphere or extent of insular resection had no significant effect on the studied variables. In the total sample, employment status and seizure control, but not location of surgery, significantly predicted quality of life. Self-reported long-term psychological status after insulo-opercular resection as part of epilepsy surgery thus appears to be similar to that observed after TLE surgery, which is commonly performed in epilepsy surgery centers.

Executive function and depressed mood are independently disruptive to health-related quality of life in pediatric temporal lobe epilepsy

OBJECTIVE

Youth with temporal lobe epilepsy (TLE) are at increased risk of depressive features and diminished health-related quality of life (HRQOL). To assist in the development of future behavioral interventions for youth with TLE, the current study explored potential pathways by which executive functioning (EF) and depressive features impinge upon HRQOL in the context of psychosocial and seizure-specific factors.

METHODS

Data included parental ratings on the Behavior Assessment System for Children (BASC-2), Behavior Rating Inventory of Executive Function (BRIEF), and the Quality of Life in Childhood Epilepsy (QOLCE) questionnaires for 82 children (Age = 11.99, SD = 3.80) with TLE. Observed path analysis was used to simultaneously investigate the determinants of HRQOL in pediatric TLE. Indirect effects were evaluated with bootstrap analyses.

RESULTS

Both executive dysfunction and depressive features were negatively linked to child HRQOL, and, furthermore, EF and HRQOL were indirectly connected by depressive features. In addition, depressive features were linked to lower EF, current antiepileptic drug (AED) regimen, and the presence of hippocampal sclerosis. Diminished EF was linked to parental psychiatric history and family stress; EF mediated the relationship of parental psychiatric history and family stress on both depressive features and diminished HRQOL. Finally, a more complicated AED regimen and higher HRQOL were indirectly connected by depressive features.

CONCLUSION

This study underscores the importance of child depressive features and EF along with environmental and epilepsy-specific factors on HRQOL in pediatric TLE.

A live-online mindfulness-based intervention for children living with epilepsy and their families: protocol for a randomized controlled trial of Making Mindfulness Matter©

BACKGROUND

Epilepsy extends far beyond seizures; up to 80% of children with epilepsy (CWE) may have comorbid cognitive or mental health problems, and up to 50% of parents of CWE are at risk for major depression. Past research has also shown that family environment has a greater influence on children's and parents' health-related quality of life (HRQOL) and mental health than epilepsy-related factors. There is a pressing need for low-cost, innovative interventions to improve HRQOL and mental health for CWE and their parents. The aim of this randomized controlled trial (RCT) is to evaluate whether an interactive online mindfulness-based intervention program, Making Mindfulness Matter (M3), can be feasibly implemented and whether it positively affects CWE's and parents' HRQOL and mental health (specifically, stress, behavioral, depressive, and anxiety symptoms).

METHODS

This parallel RCT was planned to recruit 100 child-parent dyads to be randomized 1:1 to the 8-week intervention or waitlist control and followed over 20 weeks. The intervention, M3, will be delivered online and separately to parents and children (ages 4-10 years) in groups of 4-8 by non-clinician staff of a local community epilepsy agency. The intervention incorporates mindful awareness, social-emotional learning skills, and positive psychology. It is modeled after the validated school-based MindUP program and adapted for provision online and to include a parent component.

DISCUSSION

This RCT will determine whether this online mindfulness-based intervention is feasible and effective for CWE and their parents. The proposed intervention may be an ideal vector to significantly improve HRQOL and mental health for CWE and their parents given its low cost and implementation by community epilepsy agencies.

TRIAL REGISTRATION

ClinicalTrials.gov NCT04020484 . Registered on July 16, 2019.

Self-reported quality of life and degree of youth-parent agreement: A long-term follow-up of childhood-onset epilepsy

OBJECTIVE

To prospectively delineate self-reported health-related quality of life (HRQOL) of adolescents and young adults (AYAs) 8 and 10 years after an epilepsy diagnosis and evaluate the degree of AYA-parent agreement in ratings of AYA's HRQOL.

METHODS

Data came from the Health-Related Quality of Life in Children with Epilepsy Study (HERQULES), a 10-year longitudinal study of children, aged 4-12 years, with newly diagnosed epilepsy. Epilepsy-specific HRQOL was self-reported by AYA 8 and 10 years after diagnosis and by parents at multiple time points throughout the 10-year follow-up. Measurers of HRQOL over time were analyzed using a linear mixed-effect model approach. AYA-parent agreement was evaluated using intraclass correlation coefficient (ICC) and Bland-Altman plots.

RESULTS

A total of 165 AYAs participated at long-term follow-up. There was considerable heterogeneity among AYA's HRQOL, and as a group, there was no significant change in HRQOL from the 8- to 10-year follow-up. Household income at the time of diagnosis, seizure control at follow-up, and a history of emotional problems (anxiety/depression) were independent predictors of HRQOL at follow-up. AYA-parent agreement on AYA's HRQOL was moderate (ICC 0.62, 95% CI 0.51-0.71), although considerable differences were observed at the individual level. AYA-parent agreement varied with AYA's and parent's age, seizure control, and family environment.

SIGNIFICANCE

In the long-term after a diagnosis of epilepsy, AYAs report stable HRQOL over time at the group level, although notable individual differences exist. Seizure control, anxiety/depression, and family environment meaningfully impact AYA's long-term HRQOL. AYA and parent reports on HRQOL are similar at the group level, although they cannot be used interchangeably, given the large individual differences observed.

Trajectories of quality of life 10 years following a diagnosis of epilepsy in childhood

OBJECTIVE

This study estimated trajectories of health-related quality of life (HRQOL) over a 10-year period among children newly diagnosed with epilepsy. We also modeled the characteristics of children, parents, and families associated with each identified trajectory.

METHODS

Data came from the HERQULES (Health-Related Quality of Life in Children With Epilepsy Study), a Canada-wide prospective cohort study of children (aged 4-12 years) with newly diagnosed epilepsy. Parents reported on their children's HRQOL at diagnosis, and at 0.5-, 1-, 2-, 8-, and 10-year follow-ups using the Quality of Life in Childhood Epilepsy Questionnaire-55. Trajectories of HRQOL were identified using latent class growth models. Characteristics of children, parents, and families at the time of diagnosis that were associated with each trajectory were identified using multinomial logistic regression.

RESULTS

A total of 367 children were included. Four unique HRQOL trajectories were identified; 11% of the cohort was characterized by low and stable scores, 18% by intermediate and stable scores, 35% by intermediate scores that increased then plateaued, and 43% by high scores that increased then plateaued. Absence of comorbidities, less severe epilepsy, and better family environment (greater satisfaction with family relationships and fewer family demands) at the time of diagnosis were associated with better long-term HRQOL trajectories. Although the analyses used estimates for missing values and accounted for any nonrandom attrition, the proportion of children with poorer HRQOL trajectories may be underestimated.

SIGNIFICANCE

Children with new onset epilepsy are heterogenous and follow unique HRQOL trajectories over the long term. Overall, HRQOL improves for the majority in the first 2 years after diagnosis, with these improvements sustained over the long term.

Impact of epilepsy surgery on quality of life and burden of caregivers in children and adolescents

OBJECTIVE

The objective of this study was to analyze the impact of pediatric epilepsy surgery on the quality of life (QOL), determining whether patients improve, worsen, or maintain their preoperative patterns, as it relates to the burden of caregivers, as well as evaluating potential related factors, from both the children and caregivers perspectives.

MATERIAL AND METHODS

This is a retrospective study of children and adolescents who underwent epilepsy surgery and were evaluated through clinical data, videoelectroencephalogram (V-EEG), neuroimaging findings, neuropsychological testing, and aspects of QOL. These assessments were performed prior to surgery and after six months and two years of follow-up. Quality of life was assessed with epilepsy-specialized questionnaires, namely Questionnaire health-related quality of life for children with epilepsy (QVCE-50), Autoquestionnaire Qualité de Vie Enfant Image Scale (AUQUEI), Quality of life in epilepsy inventory for adolescents (QOLEI-AD-48); and burden of caregivers with Burden Interview - ZARIT scale. Postoperative changes in QVCE-50 were quantified using measures of the analysis of variance (ANOVA MR) for comparison of the difference between the three times of the scale and domains.

RESULTS

Fifty patients were enrolled. Of these, 27 (54%) were male, with a mean age at surgery of 8.2 years (range: 1-18 years). Thirty-five patients (70%) were Engel I and one was Engel II (2%) at six months of follow-up, whereas 28 (56%) were Engel I and 32 (64%) were Engel I or II at two years of follow-up. Preoperatively, 21 (42%) presented with moderate or severe intellectual disability. Postoperative cognitive evaluations at the two-year follow-up showed 18 (36%) maintained similar deficits. The QVCE-50 showed postoperative improvement in the two-year follow-up period, but not at six months after surgery. Postoperative improvements were associated mainly with better seizure outcome. Autoperception evaluations were limited because of the clinical and cognitive severity of patients. The burden of caregivers was quoted as mild to moderate and remained unchanged postoperatively.

CONCLUSIONS

Children and adolescents with surgically treated epilepsy reach a good seizure outcome, stabilize in intellectual and adaptive functions, and have an increase in QOL, from the caregiver's perspective. Nevertheless, their burden remains unchanged. Seizure outcome is the main factor for improvement in the QOL. The upgrading of structured questionnaires and QOL instruments specific to pediatric epilepsy can be helpful to assess patient- and caregiver-reported surgical outcomes, allowing for better planning of therapeutic approaches.

Clinical application of the PedsQL Epilepsy Module (PedsQL-EM) in an ambulatory pediatric epilepsy setting

INTRODUCTION

Children with epilepsy report lower health-related quality of life (QOL) compared with healthy children and those with other chronic disorders. This study piloted the recently published Pediatric Quality of Life Inventory (PedsQL) Epilepsy Module (PedsQL-EM) in an ambulatory setting and studied epilepsy-related factors contributing to QOL in children with epilepsy.

METHODS

Children with epilepsy aged 8-18 years who were ambulant and verbal were recruited from pediatric neurology clinics. Children and their caregivers completed age-appropriate versions of the PedsQL-EM (8-12 or 13-18 years) in the clinic waiting area. Treating neurologists completed medical questionnaires about their patients' epilepsy.

RESULTS

We collected 151 parent-report and 127 self-report PedsQL-EMs. Administration time was 5-10 min with some children receiving assistance from the researcher. Mean age of children was 12.9+/-3.0, with 77 females (51%). Parents reported lower mean QOL scores across all subdomains compared with their children. Parents reported significantly lower QOL for children with earlier age at epilepsy onset, longer epilepsy duration, presence of seizures during the last month, more severe epilepsy, increased number of antiepileptic drugs (AEDs), and cognitive comorbidity. The same factors impacted on child self-reporting, but with more variability across subdomains.

CONCLUSIONS

The PedsQL-EM is an epilepsy-specific measure of QOL that is quick and easy to administer and is sensitive to the clinical factors reported to impact on QOL in pediatric epilepsy.

Seizure freedom improves health-related quality of life after epilepsy surgery in children

AIM

To determine whether epilepsy surgery improved health-related quality of life (HRQoL) and whether seizure freedom after surgery mediated the improvement in HRQoL.

METHOD

This multicenter cohort study compared HRQoL after epilepsy surgery to pharmacological management in children with drug-resistant epilepsy (DRE). HRQoL was measured using the Quality of Life in Childhood Epilepsy (QOLCE) questionnaire at baseline and 1-year follow-up. The mediator between treatment type and HRQoL was seizure freedom.

RESULTS

Two hundred and thirty-seven patients were recruited (surgery group: n=147 [92 males, 45 females]; pharmacological group: n=90 [53 males, 37 females]). Mean age at seizure onset was 6 years (SD 4y 4mo) in the surgical group and 6 years 1 month (SD 4y) in the pharmacological group. The odds ratio of seizure freedom was higher for the surgery versus pharmacological group (β=4.24 [95% confidence interval {CI}: 2.26-7.93], p<0.001). Surgery had no direct effect on total QOLCE score at 1-year (β=0.24 [95% CI -2.04 to 2.51], p=0.839) compared to pharmacological management, but had an indirect effect on total QOLCE that was mediated by seizure freedom (β=0.92 [95% CI 0.19-1.65], p=0.013), adjusting for baseline total QOLCE score. Surgery had a direct effect on improving social function (p=0.043), and an indirect effect on improving physical function (p=0.016), cognition (p=0.042), social function (p=0.012) and behavior (p=0.032), mediated by seizure freedom.

INTERPRETATION

Greater seizure freedom achieved through epilepsy surgery mediated the improvement in HRQoL compared to pharmacological management in children with DRE.

WHAT THIS PAPER ADDS

Seizure freedom is higher after pediatric epilepsy surgery compared to pharmacologically managed epilepsy. Surgery indirectly improves health-related quality of life (HRQoL) mediated by seizure freedom compared to pharmacological management. Surgery has a direct effect on improving social function relative to pharmacological management. Baseline HRQoL was an important predictor of HRQoL after treatment.

Validation of the Quality of Life in Childhood Epilepsy Questionnaire (QOLCE-55 and QOLCE-16) for use by parents of young adults with childhood-onset epilepsy

OBJECTIVE

The objective of the study was to validate the parent-proxy reported Quality of Life in Childhood Epilepsy Questionnaire (QOLCE) in a sample of young adults with a history of childhood-onset epilepsy, allowing for the utilization of a consistent informant (the parent) across the youths' stages of development. The 55-item (QOLCE-55) and 16-item versions (QOLCE-16) were evaluated.

METHODS

Data came from 134 young adults (aged 18.0 to 28.5 years) with childhood-onset epilepsy, recruited through community and tertiary care centers across Canada. Confirmatory factor analysis (CFA) was used to assess the higher-order factor structure of the QOLCE. Cronbach's alpha was used to evaluate internal consistency. Convergent validity was assessed by intraclass correlation coefficients (ICC) with the youth self-reported Quality of Life in Epilepsy Questionnaire (QOLIE-31-P).

RESULTS

The higher-order factor structure of the QOLCE-55 and QOLCE-16 demonstrated adequate fit: QOLCE-55 comparative fit index (CFI) = 0.968, Tucker-Lewis index (TLI) = 0.966; and root mean square of approximation (RMSEA) = 0.061; QOLCE-16 CFI = 0.966, TFI = 0.959, RMSEA = 0.141. Higher-order factor loadings were strong, ranging from 0.71 to 0.90. Internal consistency was excellent for the total score (α_QOLCE-55 = 0.97; α_QOLCE-16 = 0.93) and good-excellent for each subscale (α > 78). Convergent validity was moderate to good for the total score (ICC > 0.72) and each subscale (ICC > 0.51).

SIGNIFICANCE

These findings provide support for the use of the QOLCE-55 and QOLCE-16 among young adults with a history of childhood-onset epilepsy. Utilizing a consistent measure and informant across the stages of development is essential to reliably evaluate change over time.

Social functioning and health-related quality of life trajectories in people with epilepsy after epilepsy surgery

OBJECTIVE

An improvement in quality of life (QoL) over time after epilepsy surgery has been demonstrated in people with epilepsy; however, social functioning has been less investigated. We conducted this study to examine whether postsurgical improvement is parallel between QoL and social functioning in patients with epilepsy.

METHODS

We retrospectively reviewed patients who underwent epilepsy surgery. All participants completed a comprehensive neuropsychological assessment, the Quality of Life in Epilepsy Inventory (QOLIE-89) questionnaire, and the Social and Occupational Functioning Scale for Epilepsy (SOFSE) before surgery and at 3 months, 6 months, and 1 year after surgery. Demographic and epilepsy-related information was also collected. Generalized estimating equations with identity links were used to model the QOLIE-89 and SOFSE over time and possible associated factors. A p < 0.05 was considered statistically significant.

RESULTS

A total of 76 patients, including 36 males and 43 females aged 18 to 62 years were collected. Both total QOLIE-89 and overall SOFSE improved over time after epilepsy surgery (adjusted p value < 0.001 and 0.002, respectively, with Bonferroni's correction). Total QOLIE-89 improved 3 months after surgery, while overall SOFSE showed no significant improvement until 6 months after surgery. The presurgical Full-Scale Intelligence Quotient (FSIQ) of the Wechsler Adult Intelligence Scale-III and years of education were significantly associated with time-dependent improvement for both total QOLIE-89 and overall SOFSE (p value < 0.001). At one year after surgery, overall SOFSE and total QOLIE-89 scores were significantly higher in the seizure-free group than in the nonseizure-free group (p value = 0.040 and 0.032, respectively).

CONCLUSION

Social functioning significantly improved in people with epilepsy after surgery as QoL, but it took more time to exhibit improvement. People with better FSIQ and more years of education had better improvement in social functioning over time. The early intervention of rehabilitation programs after epilepsy surgery might be necessary to facilitate the improvement in social functioning.

Seizure outcome of pediatric epilepsy surgery

Objective

This systematic review and meta-analyses assessed seizure outcome following pediatric epilepsy surgery.

Methods

MEDLINE, EMBASE, and Cochrane were searched for pediatric epilepsy surgery original research from 1990 to 2017. The outcome was seizure freedom at 12 months or longer follow-up. Using random-effects models, the effect sizes for controlled studies, uncontrolled studies on surgery locations (temporal lobe [TL], extratemporal lobe [ETL], or hemispheric surgery), pathologies, nonlesional epilepsy, and incomplete resection were estimated. Meta-regression assessed the relationship between age at surgery, age at seizure onset, and seizure outcome. Random-effects network meta-analysis was conducted for surgery locations.

Results

Two hundred fifty-eight studies were included. Surgery achieved higher seizure freedom than medical therapy (odds ratio [OR] = 6.49 [95% confidence interval [CI]: 2.87–14.70], p < 0.001). Seizure freedom declined over time after surgery, from 64.8% (95% CI: 51.2%–76.4%; p = 0.034) at 1 year, to 60.3% (95% CI: 52.9%–67.4%; p = 0.007) at 5 years, and to 39.7% (95% CI: 28.4%–52.2%, p = 0.106) at 10 years. Seizure freedom was (1) highest for hemispheric surgery, followed by TL and ETL surgery, and (2) highest for tumor and lower for malformations of cortical development. Seizure freedom was lower for nonlesional than lesional epilepsy (OR = 0.54 [95% CI: 0.34, 0.88], p = 0.013) and incomplete than complete resection (OR = 0.13 [95% CI: 0.08, 0.21], p < 0.001). Age at surgery and age at seizure onset were associated with seizure freedom for mixed pathologies and surgery locations and TL surgery.

Conclusion

Epilepsy surgery was more effective than medical therapy to control seizures. Understanding seizure outcomes of different surgery locations, pathologies, nonlesional epilepsy, and incomplete resection will assist with presurgical counseling.

Long-Term Cognitive Improvement After Functional Hemispherectomy

BACKGROUND

To investigate intellectual development after functional hemispherectomy and to evaluate the favorable or unfavorable factors affecting prognosis.

METHODS

Twenty-three patients from the patient follow-up database of the Epilepsy Center of Neurosurgery were selected for this retrospective study. The inclusion criteria of the patients were functional hemispherectomy surgery, surgical age older than 6 years, patients able to complete the intelligence assessment, follow-up time not less than 2 years, and availability of complete preoperative evaluation and postoperative follow-up data. Full Scale Intelligence Quotients (FSIQ) were calculated preoperatively and at the follow-up times for each patient. Correlations between the preoperative to postoperative changes in FSIQ and risk factors (age at epilepsy onset, duration of preoperative epilepsy, postoperative changes in the electroencephalogram, seizure status after surgery, and follow-up time) were analyzed. EpiData 3.1 software was used to establish a database and SPSS 22.0 software was used for data collation and analysis, and used the matching sample Wilcoxon symbol rank and test to conduct the analysis.

RESULTS

The data of 23 patients were analyzed. The final follow-up results showed that 73.9% of the patients (17/23) had a significant increase in FSIQ scores (P = 0.006) after surgery, indicating that their cognitive function improved significantly. Successful surgery, successful postoperative seizure control, normalization of postoperative electroencephalogram, shorter disease duration before surgery, and longer recovery periods after surgery (follow-up time) were all related with good intellectual prognosis.

CONCLUSIONS

Successful functional hemispherectomy significantly improved the cognitive function of patients. Functional hemispherectomy is a safe and effective treatment for patients with intractable epilepsy caused by hemispheric lesions and can effectively promote intellectual recovery and development.

Parents' view of the cognitive outcome one year after pediatric epilepsy surgery

OBJECTIVES

The cognitive outcome of pediatric epilepsy surgery has mainly been examined on the basis of standardized tests. Here, we analyzed the outcome in six cognitive domains from the parents' view.

METHODS

Included were consecutive surgical pediatric patients whose parents filled-in a comprehensive questionnaire on cognitive problems in children and adolescents (Kognitive Probleme bei Kindern und Jugendlichen (KOPKIJ); Gleissner et al. 2006) at the preoperative baseline (T1) as well as twelve months thereafter (T2). All children also underwent standard neuropsychological assessments at T1 and T2.

RESULTS

Parents of 96 patients provided pre- and postoperative KOPKIJ data. Overall, 80% of the children became seizure-free at the follow-up. Group means indicated a strong positive effect of time on KOPKIJ and neuropsychological performance. We found postoperative improvements in five out of six cognitive domains (language, memory, executive functions, attention, school; unchanged: visuospatial abilities). Individually, improvements were twice as likely as declines. However, 33 patients (35%) experienced significant decline in at least one cognitive domain. Later onset of epilepsy resulted in better performance but had no effect on change scores. Seizure-free status, lower antiseizure drug load, and stronger drug reduction after surgery contributed to postoperative cognitive improvements as perceived by the parents; no other effects of clinical factors were obtained (e.g., localization/lateralization). Despite their similar outcome patterns, change scores as derived from parental ratings and neuropsychological assessment were not correlated.

CONCLUSIONS

Parents acknowledged the overall positive neurocognitive development after pediatric epilepsy surgery as previously shown by standardized tests. Seizure freedom and lower antiseizure drug load contributed to the beneficial cognitive outcome. Even if cognitive improvements outweighed declines, a risk for cognitive decline with impact on everyday functioning does exist.

Impact of resective surgery for pediatric drug-resistant epilepsy on emotional functioning

OBJECTIVE

The objective of the study was to evaluate emotional functioning following surgical and medical treatment in children with drug-resistant epilepsy (DRE; i.e., uncontrolled seizures despite treatment with ≥2 antiepileptic drugs [AED]).

METHOD

This prospective, longitudinal, multicenter study involved 128 children and adolescents (8-18 years) with DRE who were assessed for surgical candidacy; 48 went on to have surgery and 80 continued medical treatment. Participants completed child-validated self-report measures of anxiety and depression at baseline, 6, and 12 month follow-up. Standardized z-scores were calculated with higher scores indicative of greater symptoms.

RESULTS

At baseline, 16% and 22% of all patients reported elevated symptoms of depression and anxiety, respectively (i.e., z ≥ 1.00). Seizure freedom was higher in the surgical, compared with the medical, group at 6 (64 vs. 11%) and 12 month (77 vs. 24%) follow-up. Linear mixed effects models controlling for age found a main effect of time for both depression and anxiety; scores decreased over time for all patients. A main effect of seizure outcome was found for depression, but not anxiety; seizure freedom was associated with lower scores overall. There were no main effects of treatment or significant interactions. Multiple regression analyses found baseline mood predicted outcomes at 6 and 12 month follow-up; higher anxiety and depression scores at baseline were associated with higher scores at follow-up. Older age and greater number of AEDs at baseline was associated with higher depression scores at 12 month follow-up.

CONCLUSION

Overall, patients reported a reduction in anxiety and depressive symptoms over the first 12 months, irrespective of treatment, and baseline level of functioning was the best predictor of outcome. Despite more children achieving seizure freedom with surgery compared with medical treatment, surgery was not associated with better outcomes over time. It may be that changes in anxiety and depression require a longer time to emerge postsurgery; however, being seizure-free is associated with fewer depressive symptoms, irrespective of treatment type.

Parent reported health related quality of life (HRQoL) and behaviour in young people with epilepsy before and two years after epilepsy surgery

PURPOSE

The aim of this study was to compare parent-reported Health Related Quality of Life (HRQoL) and behaviour of young people before (baseline) and two years after paediatric epilepsy surgery (follow-up).

METHODS

The parents of 107 children who underwent epilepsy surgery completed surveys focussing on different aspects of child HRQoL and behaviour at baseline and follow-up. Parents of children with multiple disabilities (n = 27) completed five additional questions focussing on child HRQoL. Changes in scores between baseline and follow-up were compared using Wilcoxon signed-rank tests. Factors associated with changes in scores were analyzed using linear regression.

RESULTS

HRQoL and behaviour were significantly improved at follow-up (p < 0.001). HRQoL was also significantly improved for children with multiple disabilities (p = 0.003). Factors independently associated with improvement in HRQoL on multivariable analysis were lower baseline scores (p < 0.001), seizure-free status (p < 0.001) and improvement in behaviour (p = 0.022). Factors independently associated with improvement in behaviour were higher baseline difficulties (p < 0.001), reduction in antiepileptic drug (AED) usage, (p < 0.001), seizure-free status (p = 0.04), younger age (p = 0.03), and improvements in HRQoL (p = 0.028).

CONCLUSION

Parent rated HRQoL and behaviour had improved two years after epilepsy surgery. Seizure freedom was associated with both improvements in HRQoL and behaviour. Additionally, a reduction in AED usage contributed to reduced behavioural difficulties. All children undergoing epilepsy surgery should undergo assessment of HRQoL and behaviour at baseline and follow-up.

Common psychiatric comorbidities in epilepsy: How big of a problem is it?

Psychiatric illness and epilepsy commonly co-occur in adults and in children and adolescents. Theories of comorbidity are complex, but recurring associations between the conditions suggest overlap that is more than simple co-occurrence. Common underlying pathophysiology may imply that epilepsy itself may constituently include psychiatric symptoms. Conditions such as depression or cognitive difficulties commonly occur and in some cases, are considered to be associated with specific epilepsy characteristics such as localization or seizure type. Regardless of etiologic attributions to psychiatric comorbidity, it is clear today that treatment for epilepsy needs to target psychiatric illness. In many cases, quality-of-life improvements depend more upon addressing psychiatric symptoms than seizures themselves. This article is part of the Special Issue "Obstacles of Treatment of Psychiatric Comorbidities in Epilepsy".

Social functioning of children after epilepsy surgery: A literature review

This literature review on social functioning of children after epilepsy surgery is based on 24 papers addressing two categories of social functioning: social cognition (n = 4) and general social functioning (n = 20). Overall, studies that compared with healthy peers revealed children who had undergone epilepsy surgery to have more problems in both social cognition and general social functioning. Half of the studies found some improvement in social functioning in the first year(s) after epilepsy surgery, but this pertained to general social functioning, not to social cognition. The persistence of the problems in social cognition after surgery may be related to the critical period of brain maturation, lacking improvement of impairments in related cognitive domains or to a defective underlying brain condition - rather than to the epilepsy. Problems in general social functioning may be explained by the adjustments the children and their families had to make because of the child's drug-resistant epilepsy and difficulties to adjust to the new situation after surgery. The neurological and behavioral explanations are likely to be interrelated in light of the multifaceted and complex nature of social functioning. Epilepsy surgery does not appear to solve the problems in social functioning associated with having had drug-resistant epilepsy. As social functioning is an important aspect of healthy development, it should be assessed comprehensively in order to obtain a knowledge base that allows 1) proper treatment of children with epilepsy (CwE) and 2) counseling patients and families prior to and after epilepsy surgery.

Social outcomes for adults with a history of childhood-onset epilepsy: A systematic review and meta-analysis

OBJECTIVES

This review aimed to describe social outcomes in adulthood for people with a history of childhood-onset epilepsy and identify factors associated with these outcomes; focused on educational attainment, employment, income/financial status, independence/living arrangement, romantic relationships, parenthood, and friendships.

METHODS

A comprehensive search of MEDLINE, EMBASE, and PsycINFO was conducted, as well as forward and backward citation tracking. A total of 45 articles met inclusion criteria. Random effects meta-analyses were conducted, and subgroup analyses evaluated outcomes for people with epilepsy (PWE) with good prognosis (e.g., normal intelligence, 'epilepsy-only') and poor prognosis (e.g., intellectual disability, Dravet syndrome), and those who underwent epilepsy surgery in childhood.

RESULTS

Among all PWE, 73% (95% confidence interval [CI]: 64-82%) completed secondary school education, 63% (95%CI: 56-70%) were employed; 74% (95%CI: 68-81%) did not receive governmental financial assistance; 32% (95%CI: 25-39%) were in romantic relationships; 34% (95%CI: 24-45%) lived independently; 21% (95%CI:12-33%) had children, and 79% (95%CI: 71-87%) had close friend(s). People with epilepsy often fared worse relative to healthy controls. Among PWE with a good prognosis, a comparable number of studies reported similar/better outcomes relative to controls as reported poorer outcomes. The most consistent predictor of poorer outcomes was the presence of cognitive problems; results of studies evaluating seizure control were equivocal.

CONCLUSION

People with epilepsy with a good prognosis may show similar social outcomes as controls, though robust conclusions are difficult to make given the extant literature. Seizure control does not guarantee better outcomes. There is a need for more studies evaluating prognostic factors and studies with control groups to facilitate appropriate comparisons.

Quality of Life After Epilepsy Surgery in Children: A Systematic Review and Meta-Analysis

BACKGROUND

Pediatric epilepsy surgery is a treatment modality appropriate for select patients with debilitating medication-resistant seizures. Previous publications have studied seizure freedom as the main outcome of epilepsy surgery. However, there has been no systematic assessment of the postoperative life quality for these children.

OBJECTIVE

To estimate the quality of life (QOL) long-term outcomes after surgery for intractable epilepsy in pediatric patients.

METHODS

A systematic search of the PubMed and Cochrane databases was performed. Studies reporting questionnaire-assessed QOL at least 12 months postoperatively were included. QOL means and standard deviations were compared between surgically and medically managed patients, between the preoperative and postoperative state of each patient, and were further stratified into patients achieving seizure freedom, and those who did not. Meta-analysis was performed using fixed effects models for weighted mean differences (WMD), 95% confidence intervals (CI) and sensitivity analyses. Funnel plots and Begg's tests were utilized to detect publication bias.

RESULTS

The search yielded 18 retrospective studies, reporting 890 surgical patients. Following epilepsy surgery, children had significant QOL improvement compared to their preoperative state (WMD: 16.71, 95% CI: 12.19-21.22, P < .001) and better QOL than matched medically treated controls (WMD: 12.42, 95% CI: 6.25-18.58, P < .001). Patients achieving total seizure freedom after surgery had significant postoperative QOL improvement (WMD: 16.12, 95% CI: 7.98-24.25, P < .001), but patients not achieving seizure freedom did not achieve statistical significance (P = .79).

CONCLUSION

Epilepsy surgery can effectively improve QOL in children with medication-resistant seizures, through seizure freedom, which was associated with the greatest improvement in life quality.

Patient-reported quality of life and biopsychosocial health outcomes in pediatric epilepsy: An update for healthcare providers

In the 21st century, clinicians are expected to listen to, and understand their patients' views about, their conditions and the effects that these conditions have on their functioning, values, life goals, and welfare. The goals of this review are as follows: (i) to inform, update, and guide clinicians caring for children with epilepsy about developments in the content and new methods of research on patient-reported outcomes, quality of life, and functioning; and (ii) to discuss the value of using these concepts to explore the impact of diverse interventions that are implemented in daily practice. Drawing on the literature and our program of research over the past two decades, we focus on our current understanding of a variety of health concepts and recently acquired knowledge about their significance for the lives of patients and their families. We discuss the advantages of measuring patient-reported outcomes that tell us what is important to patients. We advise on what characteristics to look for when choosing a patient-reported measure, and the relevance of these considerations. In addition, we address gaps in research knowledge and the causes of confusion that have limited their use in our daily clinical practice.

Cognition, health-related quality of life, and mood in children and young adults diagnosed with a glioneuronal tumor in childhood

AIMS

The aim of this study was to investigate long-term cognitive outcome, health-related quality of life (HRQoL), and psychiatric symptoms in children and young adults diagnosed with a glioneuronal tumor in childhood.

METHODS

Twenty-eight children and adolescents (0-17.99years) with a minimum postoperative follow-up time of five years were eligible for the study; four persons declined participation. A cross-sectional long-term follow-up evaluation was performed using the following study measures: Wechsler Intelligence Scale for Children (WISC-IV) or Wechsler Adult Intelligence Scale (WAIS-IV), Reys Complex Figure Test (RCFT), Short Form 36 version 2 (SF-36v2), Short Form 10 (SF-10), Quality of Life in Epilepsy 31 (QOLIE-31), Hospital Anxiety Depression Scale (HADS) or Beck Youth Inventory Scales (BYI), and Rosenberg Self-Esteem Scale. Historical WISC-III and RCFT data were used to compare cognitive longitudinal data.

RESULTS

Mean follow-up time after surgery was 12.1years. Sixty-three percent (15/24) were seizure-free. Despite a successive postoperative gain in cognitive function, a significant reduction relative to norms was seen in the seizure-free group with respect to perceptual reasoning index (PRI), working memory index (WMI), and full-scale intelligence quotient (FSIQ). Seizure freedom resulted in acceptable HRQoL. Thirty-two percent and 16% exceeded the threshold level of possible anxiety and depression, respectively, despite seizure freedom.

CONCLUSION

Although lower than in corresponding reference groups, cognitive outcome and HRQoL are good provided that seizure freedom or at least a low seizure severity can be achieved. There is a risk of elevated levels of psychiatric symptoms. Long-term clinical follow-up is advisable.

Surgery for Drug-Resistant Epilepsy in Children

BACKGROUND

Neurosurgical treatment may improve seizures in children and adolescents with drug-resistant epilepsy, but additional data are needed from randomized trials.

METHODS

In this single-center trial, we randomly assigned 116 patients who were 18 years of age or younger with drug-resistant epilepsy to undergo brain surgery appropriate to the underlying cause of epilepsy along with appropriate medical therapy (surgery group, 57 patients) or to receive medical therapy alone (medical-therapy group, 59 patients). The patients in the medical-therapy group were assigned to a waiting list for surgery. The primary outcome was freedom from seizures at 12 months. Secondary outcomes were the score on the Hague Seizure Severity scale, the Binet-Kamat intelligence quotient, the social quotient on the Vineland Social Maturity Scale, and scores on the Child Behavior Checklist and the Pediatric Quality of Life Inventory.

RESULTS

At 12 months, freedom from seizures occurred in 44 patients (77%) in the surgery group and in 4 (7%) in the medical-therapy group (P<0.001). Between-group differences in the change from baseline to 12 months significantly favored surgery with respect to the score on the Hague Seizure Severity scale (difference, 19.4; 95% confidence interval [CI], 15.8 to 23.1; P<0.001), on the Child Behavior Checklist (difference, 13.1; 95% CI, 10.7 to 15.6; P<0.001), on the Pediatric Quality of Life Inventory (difference, 21.9; 95% CI, 16.4 to 27.6; P<0.001), and on the Vineland Social Maturity Scale (difference, 4.7; 95% CI, 0.4 to 9.1; P=0.03), but not on the Binet-Kamat intelligence quotient (difference, 2.5; 95% CI, -0.1 to 5.1; P=0.06). Serious adverse events occurred in 19 patients (33%) in the surgery group, including hemiparesis in 15 (26%).

CONCLUSIONS

In this single-center trial, children and adolescents with drug-resistant epilepsy who had undergone epilepsy surgery had a significantly higher rate of freedom from seizures and better scores with respect to behavior and quality of life than did those who continued medical therapy alone at 12 months. Surgery resulted in anticipated neurologic deficits related to the region of brain resection. (Funded by the Indian Council of Medical Research and others; Clinical Trial Registry-India number, CTRI/2010/091/000525 .).

Cognitive outcome after epilepsy surgery in children: A controlled longitudinal study

OBJECTIVE

To analyze the determinants of cognitive outcome two years after surgery for drug-resistant epilepsy in a cohort of 31 children when compared to a control group of 14 surgical candidates who had yet to undergo surgery two years after the first neuropsychological assessment.

METHODS

Controlled longitudinal study including three evaluations of IQ (Intelligence Quotient) scores or GDQ (General Developmental Quotient) for each group depending on the patient's age: prior to surgery (T0), one year (T1) and two years (T2) after surgery for the surgical group; baseline (T0) and one year (T1) and 2years (T2) after the first evaluation for the control-group. At follow-up, 25 children (80%) of the surgical group were seizure free, while seizure outcome was unsatisfactory in the remaining six (20%). To analyze language, visuomotor skills, memory, reading, visual attention, and behavior, we selected 11 school age children in the surgical group and nine controls. We reported performance prior to (T0) and one year after surgery (T1).

RESULTS

There was a significant correlation between earlier age at seizure onset and lower IQ/GDQ at T0 (r=0.39; p=0.03) in the overall cohort. IQ/GDQ scores did not significantly differ between the surgical and control groups when analyzed at T0 and T2. However, they evolved differently with an improved developmental trajectory becoming identifiable only in the surgical group (F_1,31=5.33 p=0.028; η²=0.15). There was also a significant increase of forward digit span (Z=2.33; p=0.02) and Rey recall scores (Z=1.97; p=0.049) in the surgical school age subgroup at T1 versus T0.

SIGNIFICANCE

We identified significantly different developmental trajectories in operated versus non- operated children with improved IQ/GDQ scores in operated children only. We also observed a significant increase of digit span scores and Rey recall scores a year after surgery. Further studies including larger samples with longer follow-ups are needed to confirm these preliminary findings.

Academic Outcomes in Individuals With Childhood-Onset Epilepsy: Mediating Effects of Working Memory

OBJECTIVES

Academic difficulties are common in children with epilepsy, although little is known about the effect of various seizure-related and cognitive variables. Given that persistent seizures may negatively impact academics, and that working memory is predictive of academic abilities, we examined the effects of recent seizures and working memory on word reading, spelling, and arithmetic in pediatric epilepsy. We hypothesized that persistent seizures would be associated with lower working memory ability, which would in turn result in poorer academic performance.

METHODS

Our sample consisted of 91 children with epilepsy being treated at the Hospital for Sick Children in Toronto, Canada, who underwent neuropsychological testing between 2002 and 2009 to help determine surgical candidacy. Four to 11 years later, follow-up testing was conducted on both surgical (n=61) and non-surgical (n=30) patients. Seizure status was defined by the presence or absence of seizures within the preceding 12 months.

RESULTS

5000 bias-corrected bootstrap resamples with replacement were used to calculate the 95% confidence intervals (CIs) for the indirect effect of seizure status on academics through working memory, controlling for baseline academic functioning. Persistent seizures were associated with reduced working memory, which was in turn associated with lower reading (B=-4.64, 95% CI [-10.21, -1.30]), spelling (B=-7.09, 95% CI [-13.97, -2.56], and arithmetic scores (B=-8.04, 95% CI [-13.66, -3.58] at follow-up.

CONCLUSIONS

For children with intractable epilepsy, working memory deficits present a significant barrier to the development of academic skills. Working memory interventions may be a helpful adjunct to academic remediation in this population to facilitate academic progress. (JINS, 2017, 23, 594-604).

Psychiatric symptoms after temporal epilepsy surgery. A one-year follow-up study

Psychiatric symptoms must be considered in patients with refractory temporal lobe epilepsy after epilepsy surgery. The main objectives of our study were to describe clinical and socio-demographical characteristics of a cohort of patients with pharmacoresistant temporal lobe epilepsy who underwent temporal lobe epilepsy surgery, and moreover, to evaluate possible risk factors for developing psychiatric symptoms. In order to achieve those goals, we conducted a prospective evaluation of psychopathology throughout the first year after surgery in a clinical sample of 72 patients, by means of three clinical rated measures; the Hamilton Anxiety Rating Scale (HARS), the Hamilton Depression Rating Scale (HDRS), and the Brief Psychiatric Rating Scale (BPRS). The psychopathological evaluations were performed by an experienced psychiatrist. A presurgical evaluation was done by a multidisciplinary team (that includes neurologist, psychiatrist, neurosurgeon, neurophysiologist, radiologists, and nuclear medicine specialist) in all patients. The decision to proceed to surgery was taken after a surgical meeting of all members of the Multidisciplinary Epilepsy Unit team. The psychiatrist conducted two postoperative assessments at 6months and 12months after surgery. The main finding was that past history of mental illness (patients who were receiving psychiatric treatment prior to the baseline evaluation) was a risk factor for anxiety, depression, and psychosis after temporal lobe epilepsy surgery.

The influence of patient, caregiver, and family factors on symptoms of anxiety and depression in children and adolescents with intractable epilepsy

OBJECTIVE

The objective was to evaluate the association of caregiver and family factors with symptoms of anxiety and depression in children and adolescents with medically refractory localization-related epilepsy (i.e., failed at least two epilepsy medications).

METHOD

Forty-four children (ages 6-11years) and 65 adolescents (ages 12-18years) and their parents participated in this multicentered, observational, cross-sectional study. Univariable and multivariable linear regressions were used to evaluate the influence of multiple patient, caregiver, and family characteristics on self-reported symptoms of anxiety and depression in the children and adolescents.

RESULTS

Among children, depressive symptoms were associated with a lower proportion of life with seizures (β=.344, p=.022), caregiver depression (β=.462, p=.002), poorer family relationships (β=.384, p=.010), and poorer family mastery and social support (β=.337, p=.025); in multivariable analysis, proportion of life with epilepsy and parental depression remained significant. No significant predictors of anxiety were found among children. Among adolescents, depressive symptoms were associated with caregiver unemployment (β=.345, p=.005) and anxiety (β=.359, p=.003), low household income (β=.321, p=.012), poorer family mastery and social support (β=.334, p=.007), and greater family demands (β=.326, p=.008); in multivariable analysis, caregiver unemployment and anxiety remained significant. Greater anxiety symptoms among adolescents were associated with females (β=.320, p=.009) and caregiver depression (β=.246, p=.048) and anxiety (β=.392, p=.001) and poorer family mastery and social support (β=.247, p=.047); in multivariable analysis, female sex and caregiver anxiety remained significant.

SIGNIFICANCE

These findings highlight the central role of caregiver psychopathology, which is amenable to intervention, on children and adolescents' symptoms of anxiety and depression. Addressing caregiver psychopathology may improve children and adolescents' quality of life even if seizure control is not attained.

Mood Disorders in Epilepsy

Mood disorders associated with epilepsy are very common and overrepresented compared with other chronic medical conditions. Depression is a particularly common and worrisome comorbidity, especially because suicidality seems to be increased significantly in the context of epilepsy. Although psychosocial stressors commonly are associated, intrinsic characteristics of seizure disorders may contribute to the expression of depressive symptoms. Depression and epilepsy may exacerbate each other. Epilepsy with seizure foci in the temporal lobe may represent a higher risk of developing depression, especially if the seizures do not generalize. Treatment of depression is multifaceted and includes psychotherapy and sophisticated regimens of anticonvulsants. Most antidepressants may be used safely and effectively in the context of depression, although high-quality evidence is lacking. Ultimately, treatment of comorbid mood disorder has important implications for outcome and quality of life, perhaps even more than treatment of epilepsy itself.

Predictors of language skills in the long term after pediatric epilepsy surgery

OBJECTIVE

The objective of this study was to evaluate language skills in a heterogeneous cohort of patients who underwent or were considered for epilepsy surgery in childhood 4-11years earlier. The few existing studies that have evaluated cognitive function in the long term after surgery have examined intelligence and memory.

METHOD

Participants were 97 patients, of whom 61 underwent surgery. They completed standardized tests of picture naming, vocabulary, letter fluency, semantic fluency and intelligence at baseline and, on average, 7years later.

RESULTS

Among all patient groups, scores across language tasks were similar at baseline and follow-up. Language skills were largely independent of surgical status but were associated with seizure control. Seizure freedom and/or a longer proportion of life without seizures were associated with higher scores across all language tasks at follow-up. However, few patients showed meaningful improvements or deterioration at the individual level. Older age at epilepsy onset, higher IQ, and higher baseline scores were associated with higher follow-up scores on all language tasks. Localization and lateralization of epileptogenic foci and language lateralization were associated with higher scores on some language tasks at follow-up. Most of these variables were also predictive of change in scores over time on some of the language tasks.

SIGNIFICANCE

Language skills largely remained similar at baseline and follow-up. Seizure freedom was associated with a modest advantage at the group level, and no significant change at the individual level, suggesting an abnormal neural substrate or epileptic activity prior to seizure control may hinder the long-term capacity for improvement, even in the absence of seizure activity.

Outcomes of resective surgery in children and adolescents with focal lesional epilepsy: The experience of a tertiary epilepsy center

OBJECTIVE

This study aimed to investigate the efficacy of resective surgery in children with focal lesional epilepsy by evaluating the predictive value of pre- and postsurgical factors in terms of seizure freedom.

METHODS

This study included 61 children aged between 2 and 18years who were admitted to the pediatric video-EEG unit for presurgical workup. Each patient was evaluated with a detailed history, video-EEG, neuroimaging, and postsurgical outcomes according to Engel classification to predict postsurgical seizure freedom. All the possible factors including history, etiology, presurgical evaluation, surgical procedures, and postsurgical results were analyzed for their predictive value for postoperative seizure freedom.

RESULTS

Of the 61 patients, 75% were diagnosed as having temporal lobe epilepsy (TLE), and 25% were diagnosed with extra-TLE. Two years after the surgery, 78.6% were seizure-free, of which 89% had TLE, and 50% had extra-TLE (p<0.05). Patients were more likely to have a favorable outcome for seizure freedom if they had rare seizure frequency, focal EEG findings, and focal seizures; had a temporal epileptogenic zone; or had TLE and hippocampal sclerosis. On the other hand, patients were more likely to have unfavorable results for seizure freedom if they had younger age of seizure onset, frequent seizures before the surgery, a frontal or multilobar epileptogenic zone, secondarily generalized seizures, extra-TLE with frontal lobe surgery, or focal cortical dysplasia.

SIGNIFICANCE

Resective surgery is one of the most effective treatment methods in children with intractable epilepsy. A history of young age of seizure onset, frequent seizures before surgery, secondarily generalized seizures, a multilobar epileptogenic zone, frontal lobe surgery, and focal cortical dysplasia (FCD) are the most important predictive factors indicating that a patient would continue having seizures after surgery. On the other hand, focal seizure semiologies, temporal lobe localization, and hippocampal sclerosis indicate that a patient would have better results in terms of seizure freedom.

Academic skills in the long term after epilepsy surgery in childhood

OBJECTIVE

We evaluated the progression of academic skills in a cohort of patients who underwent, or were considered for, epilepsy surgery in childhood, four to eleven years before. The few existing studies that have evaluated cognitive function in the long term after surgery have examined intelligence and memory.

METHOD

Participants were 97 patients with childhood-onset intractable epilepsy; 61 had undergone resective epilepsy surgery. Participants completed standardized tests of reading, spelling, arithmetic, and intelligence at baseline and, on average, 7years after. Surgical patients were additionally assessed one year postsurgery.

RESULTS

At baseline and long-term follow-up, 61% and 69% of patients, respectively, scored at least one standard deviation below normative data in at least one academic domain. Evaluation of change over time while controlling for IQ showed that arithmetic scores were lower at long-term follow-up in comparison with those at baseline among all patient groups, whereas reading and spelling scores remained unchanged. Few advantages were associated with seizure control. Multiple regression analyses found that older age at surgery, cessation of antiepileptic medications, improved IQ, and low baseline scores were independently associated with improvement in some academic domains among all patient groups.

CONCLUSION

We found that arithmetic scores were lower at long-term follow-up, suggesting a lack of ongoing development or deterioration in skills. Reading and spelling scores remained stable suggesting that patients made gains in abilities at a rate expected for their increase in age; this finding contrasts with recent short-term outcome studies identifying significantly lower scores over time in these areas.

The spectrum of long-term cognitive and functional outcome after hemispherectomy in childhood

PURPOSE

To evaluate cognition, behavior, daily functioning and health-related quality of life (HrQoL) five years to more than a decade after hemispherectomy (HE) in childhood.

METHODS

This countrywide Dutch cohort study of 31 patients, who underwent HE between 1994 and 2009, included a semi-structured interview with parents, an assessment of cognition, and screening of behavioral problems and HrQoL.

RESULTS

Twenty-two school-age children and young adults [median age 13.8 years (0.5 at epilepsy onset, 5.3 at HE)] were assessed with age-appropriate cognitive tests. IQ ranged from 45 to 82 (median 61). Despite performing below mean norm scores, these participants could learn and remember, sustain attention, inhibit irrelevant responses, read and write. Nine more children [median age 9.7 years (0.25 at epilepsy onset, 1.4 at HE)] were so mentally retarded that age-appropriate testing was impossible. This group was almost totally dependent on others in daily activities, had the highest proportion of pre-existing contralateral MRI-abnormalities and after HE the highest rates of seizure recurrence and behavioral problems. Parents in both groups rated HrQoL surprisingly positively (mean VAS-score 72.5), with a scarce low rating (40). All parents reported problems with respect to their children's self-care, daily activities and mobility.

CONCLUSION

At least five years after HE, cognitive, behavioral and daily functioning encompasses a broad spectrum that varies from profound retardation and almost total dependence to low normal cognition and a reasonably independent existence. Pre-existing contralateral MRI abnormalities reflect a more generally affected brain with a limited ability to mediate development after HE.

Health-related quality of life and emotional well-being in parents of children with epilepsy referred for presurgical evaluation in Sweden

PURPOSE

The purpose of this study was to assess and compare health-related quality of life (HRQoL) and emotional well-being in mothers and fathers of children with drug-resistant epilepsy, referred for presurgical evaluation in Sweden.

METHODS

Mothers (n=117) and fathers (n=102) of 122 children (0-18 years) completed the generic 36-item Short Form Health Survey (SF-36) and the Hospital Anxiety and Depression Scale (HADS). Mothers' and fathers' SF-36 scores were compared with age-adjusted Swedish population values using the independent t-tests. Differences in the proportions of mothers vs. fathers classified as 'noncases' or 'possible/probable' clinical cases of anxiety (HADS-A) and depression (HADS-D), respectively, were assessed with the chi-square test. Parents' HADS scores were also compared using independent t-tests.

RESULTS

Mothers had significantly lower scores compared with norms on 6 of the 8 SF-36 domains (p<0.01), while fathers had significantly lower scores on 4 of the domains (p<0.01). Mothers had significantly lower scores than fathers on 4 of the SF-36 domains (p<0.05). Significantly more mothers than fathers scored below the population mean for the SF-36 Mental Component Summary score. A significantly larger proportion of mothers than fathers had 'possible/probable' anxiety (52% vs. 38%) but not depression (30% vs. 22%). Mothers had significantly worse scores than fathers on HADS-A (p<0.01) but not on HADS-D.

CONCLUSION

Mothers and fathers of children with drug-resistant epilepsy have diminished HRQoL compared with population norms. Symptoms of anxiety appear to be more common than symptoms of depression. Mothers experienced higher levels of anxiety, but not depression, than fathers and scored lower than fathers on vitality, mental health, and Mental Component Summary of the SF-36. There is a need to identify contributory factors and interventions to ameliorate these difficulties.