A clinimetric approach to assessing quality of life in epilepsy

Psychometric properties of the Lithuanian version of the patient-weighted inventory on quality of life in epilepsy

BACKGROUND

We aimed (1) to confirm that the Lithuanian version of the patient-weighted 31-item Quality of Life in Epilepsy Inventory (QOLIE-31-P) is a valid and reliable tool to be used among patients with epilepsy (PWE) in Lithuania and (2) to determine how the quality of life (QoL) is associated with demographic and clinical variables, adverse effects of antiseizure medication as well symptoms of depression and anxiety in this population.

METHODS

We used a translated and adapted Lithuanian version of the patient-weighted 31-item Quality of Life in Epilepsy Inventory (QOLIE-31-P) and conducted a cross-sectional anonymous survey among 303 adult PWE at a tertiary epilepsy center at Vilnius University Hospital Santaros Klinikos. The questionnaire also included the Neurological Disorders Depression Inventory for Epilepsy (NDDI-E), the Generalized anxiety disorder scale-7 (GAD-7), and the Liverpool Adverse Events Profile scale (LAEP). Missing values were replaced after performing multiple imputation (MI).

RESULTS

QOLIE-31-P had high internal consistency (Cronbach's α = 0.933 for all items and α = 0.676 to 0.906 for individual subscales). Its factor structure (71.2% of variance explained) consisted of seven factors, some of which overlapped ("Emotional Well-Being" and "Overall QoL") or were split ("Social Function") in comparison to the pre-defined content of the subscales. Multitrait-scaling revealed that each item is better correlated with the subscale it is included in than other subscales, suggesting good convergent and discriminant validity. On average, PWE scored 69.9 ± 16.8 (n = 164, mean = 64.9 after MI) on the QOLIE-31-P. Results were higher among male PWE, those employed or studying and having a higher level of education. In a pooled multiple regression model (adjusted R¯² = 0.700, p < 0.001), the NDDIE (β_st = -0.230, p < 0.001), the GAD-7 (β_st = -0.226, p < 0.001), the LAEP (β_st = -0.406, p < 0.001), and seizure frequency (β_st = -0.156, p < 0.001) were statistically significantly associated with total QOLIE-31-P scores.

CONCLUSION

The Lithuanian version of the QOLIE-31-P demonstrates optimal reliability and construct validity to be applied in this population. It is strongly associated with seizure frequency as well as short instruments used to measure anxiety, depression, and adverse medication effects.

A feasibility assessment of functioning and quality-of-life patient-reported outcome measures in adult epilepsy clinics: A systematic review

OBJECTIVE

The objective of the study was to identify functioning and quality-of-life (QOL) patient-reported outcome measurements (PROMs) feasible for use in the waiting room of adult epilepsy clinics.

MATERIAL AND METHODS

We searched PubMed and Web of Science for articles on in English, Spanish, Portuguese, Italian, and French published by the end of February 15th, 2019. We screened retrieved titles and abstracts looking for publications that reported the use of PROMs to measure functioning and QOL in epilepsy. The authors, clinical experts, and patient advocates from the Epilepsy Foundation of America conceptualized a set of desirable feasibility attributes for PROMs implementation in the waiting room of adult epilepsy clinics. These attributes included brief time for completion (i.e., ≤3 min), free cost, coverage of four minimum QOL domains and respective facets, and good evidence of psychometric properties. We defined QOL domains according to the World Health Organization's classification and created psychometric appraisal criteria based on the Food and Drug Administration's (FDA) Guidance.

RESULTS

Eighteen candidate instruments were identified and compared with respect to desirable attributes for use in adult epilepsy clinics. We found that the Quality-of-life in epilepsy (QOLIE)-10 and Patient-Reported Outcome Measurement Information System-10 (PROMIS-10) were the most feasible PROMs for implementation in adult epilepsy clinics based on our criteria. The QOLIE-10 and PROMIS-10 still lack ideal evidence of responsiveness in people with epilepsy.

CONCLUSION

This is the first systematic review that aimed to assess feasibility properties of available functioning and QOL PROMs. The QOLIE-10 and PROMIS-10 are potentially feasible instruments for implementation in the waiting room of adult epilepsy clinics. Further studies assessing the responsiveness of these PROMs are needed and will contribute to the selection of the most appropriate instrument for longitudinal use in adult epilepsy clinical practice.

Epilepsias na Infância

As crises epilépticas representam um dos mais freqüentes problemas neurológicos na infância. Entre 0,5% e 1% de crianças e adolescentes apresentam uma crise epiléptica associada com um distúrbio metabólico agudo ou um insulto neurológico, muitos dos quais ocorrem no período neonatal. Elevada incidência de epilepsia ocorre no primeiro ano de vida. A síndrome de West ocorre em cerca de 9% das epilepsias na infância, síndrome de Lennox-Gastaut por volta de 1% a 2%, epilepsia de ausência de 10% a 15%, epilepsias mioclônica juvenil ocorre em cerca de 5% e as epilepsia parciais benignas ocorrem em 10% de todas as epilepsias na infância, mas 20% a 25% das epilepsias são diagnosticadas entre 5 e 15 anos.

Quality of life among women with epilepsy during their reproductive years

PURPOSE

The purpose of this study was to assess the health-related quality of life (HRQoL) of women with epilepsy during their reproductive years.

METHOD

A cross-sectional study comparing two groups, one with and another without epilepsy, was conducted. Semistructure questionnaires regarding socioeconomic, demographic, and clinical profiles were used. The HRQoL was measured using the Quality of Life in Epilepsy Inventory (QOLIE-31), for comparison within the group with epilepsy, and World Health Organization of Quality of Life (WHOQOL)-bref, for comparison between the groups with and without epilepsy. Statistical analysis was performed using Fisher's exact test, Mann-Whitney test, and multivariate linear regression. A measure of significance was considered as p < 0.05.

RESULTS

Eighty women were included (40 with epilepsy and 40 without epilepsy) with mean age of 28.2 ± 6.51 years. Women of childbearing age with epilepsy tend to have lower quality of life than those without epilepsy (with epilepsy: 85.15 ± 13.50 vs. without epilepsy: 90.75 ± 12.17, p = 0.051). The groups were similar in relation to most sociodemographic characteristics, with the exception of the percentage of women with epilepsy outside the labor market (with epilepsy: 57.5% vs. without epilepsy: 30%, p = 0.012) and with clinical (with epilepsy: 27.5% vs. without epilepsy: 7.5%, p = 0.018) and psychiatric comorbidities (with epilepsy: 20% vs. without epilepsy: 0%, p = 0.003). However, logistic regression showed no influence of these variables on the HRQoL of women with epilepsy. The clinical variables associated with the worsening of HRQoL were seizure control and antiepileptic drugs (AEDs) adverse effects.

CONCLUSION

Epilepsy has a negative impact on the HRQoL of women of childbearing age, and the clinical variables controlling seizures and adverse effects of AEDs influenced HRQoL in this population.

MMPI Scale Elevations before and after Right and Left Temporal Lobectomy

Using the Minnesota Multiphasic Personality Inventory (MMPI), this study investigated preoperative and postoperative emotional and personality adjustment of temporal lobectomy patients from two major epilepsy surgery centers. Temporal lobectomy patients were included only if they were without evidence of lesional pathology on magnetic resonance imaging (MRI; other than evidence of mesial temporal sclerosis), were left-hemisphere language-dominant, and had Wide Range Achievement Test-Revised (WRAT-R) reading achievement standard scores of 70 or higher. The MMPI was completed by 175 patients before and after a temporal lobectomy. There were no significant preoperative differences on any MMPI scale between right temporal (n = 79) and left temporal (n = 96) lobectomy patients. Analysis of MMPI data from one of the surgical centers revealed significant effects for postoperative seizure control. Minimal effects of laterality of seizure onset on preoperative or postoperative psychological adjustment were found. Adequacy of preoperative psychological adjustment and postoperative seizure control have a greater impact on preoperative to postoperative psychological adjustment than side of seizure onset.

Quality of life in pregnant women with epilepsy versus women with epilepsy

It is assumed that 25% of patients with epilepsy are women of fertile age and 0.3% to 0.6% of all children are born of mothers with epilepsy. The aim of this study was to evaluate the quality of life on pregnant with epilepsy and compare with non-pregnant women with epilepsy. We evaluated two groups (Experimental Group--29 pregnant women with epilepsy and Control Group--30 women with epilepsy); they were attended at the HC/UNICAMP. The patients had three meetings to carry out and implement the anamnesis and the application of QQV-65. There were no significant differences in the measurement of quality of life when comparing both groups. However, when we analyzed individually in the pre- and post-partum periods, we observed significant differences in health aspects (p=0.0495), physical (p=0.02868) and emotional (p=0.0253) dimensions in QQV-65. This study shows that pregnancy could be interpreted as a stressor. In late pregnancy when this stressor was removed, women with epilepsy had improvement in their quality of life.

The development of a simple questionnaire to screen patients with SLE for the presence of neuropsychiatric symptoms in routine clinical practice

Aim: The creation of a physician-administered questionnaire to screen patients with Systemic Lupus Erythematosus (SLE) for the presence of symptoms suggestive of neuropsychiatric involvement (NPSLE).

Methods: The development of the questionnaire followed three phases. First, a list of manifestations was prepared based on the ACR case definitions for NPSLE. A first questionnaire was constructed including 119 items. To reduce their number, a Delphi analysis was carried out and a second questionnaire with 62 questions was developed. This questionnaire was administered to 139 patients with SLE (58 with NPSLE: 29 active, 29 inactive; and 81 without NPSLE: 39 active, 42 inactive). Questions relevant to the screening of patients were selected on the basis of the receiver operating characteristic (ROC) curve analysis.

Results: Twenty-seven questions concerning central nervous system and psychiatric manifestations were found to be relevant; the remaining could be eliminated without significantly affecting AUC. The area under the ROC curve (AUC) was 0.69 (95% CI 0.61–0.78). A score above 17 was considered as suggestive of the presence of NPSLE with a sensitivity of 92.9% (95% CI 85.1–97.3 %) and specificity of 25.4% (95% CI 14.7–39.00 %).

Conclusions: This questionnaire could represent a ‘core set’ of questions that could help in clinical practice to identify patients with neuropsychiatric symptoms requiring further evaluation.

The impact of epilepsy surgery on cognition and behavior

Famous historical cases and current clinical experience clearly indicate that the success of epilepsy surgery cannot be judged with the basic algorithm "fewer seizures = better outcome." Many factors combine and entwine with the experience of medically intractable seizures to create associated patterns of behavior and cognition. Obtaining freedom from seizures does not automatically undo the historical tangle of these salient factors, many of which remain or are exacerbated after surgery. This review examines the preoperative, perioperative, and postoperative factors that influence postoperative cognition and behavior in adult patients with temporal lobe epilepsy. Consistent findings from group studies have long masked the considerable individual variations in cognitive and behavioral outcomes following surgery. Although more recent multivariate studies provide useful clinical data for prospective surgical candidates, comprehensive long-term follow-up studies are rare. We have certainly become more proficient at measuring both cognitive and behavioral outcomes following surgery, although the ecological validity of many follow-up measures, particularly in the cognitive domain, remains low. A reliance on test scores can mask significant differences in strategy, which can also be used as a sign of lateralized dysfunction. A shift away from the "can do versus can't do" approach to the assessment of cognitive strategies may hold the key to more meaningful pre- and postoperative cognitive assessments from the patient's perspective. Emergent functional imaging paradigms show much promise in this regard. A renewed focus on cognitive strategies may also be useful in planning postoperative rehabilitation programs. New directions for outcome research in epilepsy surgery are suggested with an emphasis on a patient-centered approach.

Tradução e adaptação cultural do Quality of Life in Epilepsy (QOLIE-31)

INTRODUÇÃO: A obtenção de informações sobre o funcionamento e bem-estar dos pacientes é essencial para avaliação dos benefícios das intervenções terapêuticas, porque fornece evidências sobre o impacto da doença e do tratamento em termos de condição de saúde. No Brasil não dispomos de literatura sobre tradução, adaptação cultural e validação de escalas de qualidade de vida (QV) desenvolvidas para avaliar pessoas com epilepsia. OBJETIVO: Tradução e adaptação cultural do Questionário Qualidade de Vida em Epilepsia-31 [Quality of Life in Epilepsy Inventory-31 (QOLIE-31)]. CASUÍSTICA E METODOLOGIA: Trinta pacientes em acompanhamento regular com diagnóstico de epilepsia do lobo temporal por esclerose mesial temporal (n = 18) e epilepsia mioclônica juvenil (n = 12) responderam ao questionário. A versão original do questionário foi obtida com um dos autores da escala (Joyce Cramer) que concedeu a versão original em inglês para a tradução. RESULTADOS: Dois professores de inglês nativos realizaram a retrotradução. As versões em português e a retrotraduzida foram comparadas à original e após consenso foi obtida a versão final. Vinte pacientes (66%) eram do sexo feminino e 10 (34%) masculino, com média de idade de 36 anos. Dez (30%) completaram o 1º, 16 (53%) o 2º e 4 (17%) o 3º graus. Dos 30, 14 (46%) apresentaram até 5 crises no último mês, 10 (33%) de 6 a 10 e 6 (21%) mais de 10. Após aplicação dos 30 questionários apenas a questão 28 não foi compreendida por 3 (10%) dos pacientes, sendo reescrita após consultar a autora do questionário. CONCLUSÃO: O QOLIE-31 demonstrou-se uma escala de fácil aplicação na população brasileira, com fácil entendimento. Acreditamos que ao terminar o processo de validação será um instrumento de grande utilidade para avaliar a QV de pessoas com epilepsia.

The WOMQOL instrument measured quality of life in women of reproductive age with no known pathology

BACKGROUND AND OBJECTIVES

The Women's Quality of Life Questionnaire (WOMQOL) was developed to measure aspects of the health of women of reproductive age with no known pathology.

METHODS

Five experts in women's health and mental health rated a pool of 140 items as very significant, somewhat significant, or insignificant to women's health. Sixty-seven items were retained and formatted as a self-reported questionnaire with dichotomous responses to each statement ("true" and "false"). A total of 1,207 women completed the instrument during the follicular and late luteal phases of their menstrual cycles. Dichotomous response data from the follicular phases were analyzed using item response theory-based full-information item factor analysis to identify interpretable factors. Measurement invariance of the obtained factors across cycle phases and age cohorts was further evaluated using differential item functioning (DIF).

RESULTS

Four primary factors, made up of the 10 items with highest factor loading in each factor, were found to measure physical, mental, social, and spiritual health. No items were found to display DIF across the phases of menstrual cycles or age cohorts.

CONCLUSION

Although additional studies of diverse groups of women are advised, the final 40-item WOMQOL is a psychometrically sound measure that can be used to evaluate the quality of life of women of reproductive age in the general population.

Behaviour problems in children and adolescents with seizure disorder: associations and risk factors

PROBLEM

Fifty million people worldwide have epilepsy of whom 33 million are children. Children and adolescents with epilepsy are known to have high rates of behaviour problems and psychiatric co-morbidity. No studies on this topic have been conducted in developing countries, although 90% of such children live in the developing world.

METHODS

The current study, set in Vellore in India, assessed the prevalence of psychopathology and its associations in children and adolescents with seizure disorder. One hundred and thirty two children were rated for psychopathology on the Child Behaviours Check List, and those who qualified as psychiatric cases were compared with those who did not.

RESULTS

Seizure disorder was associated with significant psychopathology in 53.8% children. Belonging to a higher income group and living in an urban area (OR: 7.61, 95% CI: 2.78-20.8, p=0.0001), having longer than 3 years of illness (OR: 2.39, 95% CI: 2.18-5.67, p=0.03) and being treated by more than one anti-epileptic drug (OR: 3.08, 95% CI: 1.09-8.72, p=0.03) independently predicted psychopathology.

CONCLUSIONS

Psychopathology reflected a complex interaction of seizures, socio-demographic factors and treatment related variables, in accord with studies in industrialised countries. Clinicians should be sensitive to identifying psychopathology since this may lead to effective interventions for this group of children.

Variáveis psicológicas envolvidas na qualidade de vida de portadores de epilepsia

O diagnóstico de epilepsia acarreta um rompimento na maneira como o indivíduo se percebe, na sua vida social e econômica e nos seus planos de futuro. Este estudo buscou avaliar variáveis psicológicas (percepção de controle de crises) e características da doença na determinação da qualidade de vida (QV) de pacientes adultos com diagnóstico de epilepsia há mais de dois anos. Foram avaliados 60 participantes, aleatoriamente selecionados no ambulatório de epilepsia do HC/Unicamp, com idade entre 18 e 70 anos (M = 37,05; DP = 11,25), através do Questionário de Qualidade de Vida 65 (QQV-65). As variáveis da doença não foram significativas, com exceção da freqüência de crises, que apareceu associada à piora na QV, entre crises controladas e crises com freqüência acima de 10 por mês (p = 0,021). A percepção do controle de crises apareceu significativamente associada à QV (p = 0,005). A interpretação subjetiva de crises controla a resposta de ajustamento à doença e do senso de bem-estar geral e explicam porque a QV é melhor nos participantes livres de crises.

Qualidade de vida em epilepsia e percepção de controle de crises

As avaliações afetivo-cognitivas do sujeito são importantes fatores que controlam a maneira como o indivíduo sente o impacto da doença no cotidiano de sua vida. Neste sentido, a percepção de controle de crises é mais importante na avaliação da Qualidade de Vida (QV) do que as variáveis que caracterizam a doença, como sua severidade, tipo, duração e frequência de crises. Este estudo considerou a relação das variáveis subjetivas (percepção de controle de crises) e das características da doença, para avaliar a QV. Foram avaliados 60 sujeitos com diagnóstico de epilepsia, aleatoriamente selecionados no ambulatório de epilepsia do HC/UNICAMP, com idade entre 18 e 70 anos (M=37,05; DP=11,25), através do Questionário de Qualidade de Vida 65. As variáveis da doença não apresentaram relação significativa com a QV, com exceção da frequência de crises que apareceu associada à piora na QV, entre crises controladas e crises com frequência acima de 10 por mês (p=0,021). A percepção do controle de crises apareceu significantemente associada à QV (p= 0,005).

Questionário de qualidade de vida na epilepsia: resultados preliminares

Crises epilépticas acontecem por breves períodos de tempo, mas os sentimentos de ansiedade e desamparo, adaptação às restrições impostas aos estilos de vida e uma variedade de outros problemas afetam mais a qualidade de vida (QV) dos portadores de epilepsia. Este estudo propõe um protocolo que contempla os objetivos de uma avaliação de QV na saúde e seja aplicado a uma população que frequenta um hospital universitário. Consta de 65 itens e avalia o funcionamento psicossocial, limitações físicas, aspecto cognitivo, percepção de controle, auto-conceito, bem como percepção de saúde e QV. Os resultados de validação e confiabilidade são discutidos.

Epilepsy in Estonia: a quality-of-life study

PURPOSE

To study the impact of epilepsy and its treatment on people with epilepsy in Estonia and to analyze how it is affected by the characteristics of epilepsy.

METHODS

Clinical and demographic data about patients were obtained from medical notes and mailed self-completed questionnaires (including the RAND 36-Items Health Survey 1.0 (RAND-36)).

RESULTS

Information was collected from 203 patients aged 20-74 years, who all had active epilepsy. A third of the respondents had been seizure free during the last year. Eighty-four percent were receiving monotherapy. More than half of respondents felt stigmatized by epilepsy, 24.7% of them highly so. A third were working full-time, 31.9% were underemployed workers, and 11%, unemployed. Sixty-two percent of these same unemployed or underemployed workers considered their epilepsy to be a significant reason for this situation. Overall, 44% believed they had been treated unfairly at work or when trying to get a job. Study respondents scored lower in all domains on the RAND-36 than did persons from the control group. The biggest differences were found in five domains: Social functioning, Role limitations-physical, Role limitations-emotional, General health, and Vitality.

CONCLUSIONS

The clinical characteristics of this study were similar to those of most other series of prevalence cases of epilepsy. The level of employment among persons with epilepsy was not lower than that in the general population. The percentage of stigmatization was high. There were significant differences in the way respondents scored on the stigma scale and on the RAND-36 domains when measuring their health status, depending above all on seizure frequency and type.

Quality of life self-assessment as a function of lateralization of lesion in candidates for epilepsy surgery

PURPOSE

This prospective study aimed to investigate the relationship(s) of the laterality of the epileptogenic lesion to personality factors, emotional processing, and the subjective experience of quality-of-life (QOL) self-assessment in candidates for epilepsy surgery.

METHODS

Patients who were candidates for epilepsy surgery were studied. Eighteen of them (aged 19-61 years) had localization-related epilepsy in the right temporal lobe (RTLE), 18 (aged 21-50 years) had localization-related epilepsy in the left temporal lobe (LTLE), and 20 were demographically matched normal subjects. The Spielberger Trait/State Anxiety questionnaire and the QOLIE-31 questionnaire for self-assessment of quality of life were used. One-way analysis of variance, Pearson correlations, and linear regression analyses were performed on group and anxiety levels and QOLIE variables.

RESULTS

LTLE patients systematically showed higher levels of anxiety and lower self-estimates of the quality of their lives when compared with RTLE patients. All anxiety measures were highly correlated with Total QOL in LTLE (p < 0.05) but not in RTLE patients; however, different parameters of QOL showed different relationships with measures of anxiety. Results of multiple regression analyses suggested that the level of anxiety was relatively stable and less affected by QOL factors in LTLE as compared with RTLE patients (p = 0.03).

CONCLUSIONS

A high level of anxiety shown by LTLE patients may represent a personality trait and cause a response bias in overreporting of negative symptoms and a decreased self-assessment of QOL. It may also present a presurgical risk factor, particularly for patients with LTLE lesions. Appropriate patient counseling is advised.

Quality of life of patients with epilepsy (Hungarian survey)

We assessed the quality of life (QOL) of patients with epilepsy using the Quality of Life in Epilepsy Inventory (QOLIE-31). As the first step we compared our results with the data from an American survey in order to validate the test in Hungary. The results show that the Hungarian values were lower but that they followed the same trends as the American data. There was only one controversial result in the question-group of the 'the effects of treatment', which could be explained by the differences in habits and conventions, opportunities and expectations between Hungarian and American epileptic patients. We found significant differences in many aspects of quality of life with respect to (a) gender (general quality of life, seizure worry), (b) pharmacological treatment form (cognitive functions, medication effects, total score and social and role functioning) and (c) economic activity of patients (cognitive functions, emotional well-being, energy/fatigue, medication effects, overall quality of life, overall scores, seizure worry, social and role functioning). We have tried to explain the differences found by taking either the characteristics of epilepsy or the social background of the epileptic patient into consideration. Based on previous knowledge we have tried to define the situations where the assessment of quality of life for people with epilepsy, may be beneficial to their core.

Quantitative assessment of seizure severity for clinical trials: a review of approaches to seizure components

Quantitative assessment of seizure severity has been approached using a variety of systems. This review describes currently available methods and possible new approaches to seizure assessment for clinical trials. A review of the literature on methods of seizure assessments resulted in tabulation of the seizure rating scales known as VA, Chalfont-National Hospital, Liverpool, Hague, and the Occupational Hazard Scale. Seizures have been evaluated by simply counting all events, counting events by type, by clinician ratings, patient ratings, and combinations. Each of the scales has advantages and disadvantages. Most scales share core components: seizure frequency, seizure type, seizure duration, postictal events, postictal duration, automatisms, seizure clusters, known patterns, warnings, tongue biting, incontinence, injuries, and functional impairment. This review revealed a partial consensus about aspects of seizures that are important markers for severity. However, usefulness of the existing scales is limited by lack of data on responsiveness. New approaches are needed to assess changes in seizure severity as a result of an intervention in a clinical trial.

Parent- and patient-validated content for pediatric epilepsy quality-of-life assessment

PURPOSE

The purpose of this study was to assess the parent-and patient-validated content of quality-of-life measurement for use in children with epilepsy.

METHODS

We asked the parents of 80 consecutive children and adolescents with epilepsy to list in order of importance their concerns about living with or caring for their children with epilepsy. Patients were 3 months to 18 years of age (mean, 10 years) and identified at the outpatient clinic or during hospital stay. To minimize investigator bias, parents and children listed their concerns in a private setting without staff involvement.

RESULTS

Twenty-six distinct domains were generated by the parents and children. Concerns listed by more than 20 of parents included medication adverse effects (58), cognitive effects of epilepsy (46), prospects for the future (41), safety (35), independence (31), and brain damage caused by seizures (30). Concerns ranked by parents as most important included safety (18), brain damage from seizures (12), enigma of epilepsy (12), cognitive effects of epilepsy (11), and prospects for the future (10). Concerns listed by more than 20 of children included social problems (35), cognitive effects of epilepsy (29), driving (29), sports (27), medication adverse effects (25), and schooling (21). Concerns ranked by children as most important included issues related to medication adverse effects (13), cognitive effects of epilepsy (10), hatred of epilepsy (8), social embarrassment (6), fear of seizures (6), injury (6), and dislike of hospital visits (6).

CONCLUSION

The effect of epilepsy on health-related quality of life in pediatric patients is defined by a limited number of domains. A 20-item inventory was chosen from the 26 domains generated by the parents and children. Our study provides insight into parents' and children's perception of seizures and the impact of epilepsy on everyday life.

Epilepsy: Quality of Life and Cost of Care

The primary goal of epilepsy management is to enable the patient to lead a lifestyle as free from the medical and psychosocial complications of seizures as possible. This approach benefits a patient's quality of life as well as his or her family and society (particularly from a cost-of-care perspective). Though treatment with antiepileptic drugs is the primary therapy for epilepsy, physical and psychosocial issues must also be addressed. The indirect costs of epilepsy are related to the patient's ability to function. Since quality of life in epilepsy patients is improved with successful management, the indirect (and possibly the total) costs of epilepsy may decrease as the medical and psychosocial aspects of the disease are successfully managed.

Validating a decision support system for anti-epileptic drug treatment. Part II: adjusting anti-epileptic drug treatment

A model of expertise for monitoring antiepileptic drug treatment was implemented in a decision support system. We validated the advice of the system regarding treatment decisions at first follow-up with 265 paper cases based on patient records. The reference for comparison is based on the opinions of neurologists. We found considerable variation among the decisions of five neurologists. It could be shown that the system agreed with (groups of) neurologists at least as often as individual neurologists did. The correctness of the system was consistently higher than that of each of the neurologists, when the majority decision of the remaining neurologists constituted the standard.

Patient-oriented outcome assessment after temporal lobectomy for refractory epilepsy

OBJECTIVE

To determine patient-oriented outcome after anterior temporal lobectomy (ATL) for refractory epilepsy.

BACKGROUND

Health-related quality of life (HRQOL) is an important component of the assessment of outcome from epilepsy surgery, but prior controlled studies of the effect of surgery on HRQOL are inconclusive. Direct assessment of the effect of surgery on patient concerns of living with epilepsy has not been reported.

METHODS

We used reliable and valid instruments to compare HRQOL and patient concerns of 125 patients who had received an ATL more than than one year previously to a clinically similar group of 71 patients who were awaiting ATL. All patients were selected for surgery based on similar criteria. We also used bivariate correlation analysis and multivariate regression modeling to determine the association of traditional outcome variables with HRQOL.

RESULTS

Patients who had undergone ATL reported significantly less concern of living with epilepsy in 16 of 20 items of the EFA Concerns Index and better HRQOL in 8 of 11 scales of the Epilepsy Surgery Inventory-55. Regression analysis in the postoperative group demonstrated that mood status, employment, driving, and antiepileptic drug (AED) cessation, but not seizure-free status or IQ, were associated with better HRQOL.

CONCLUSIONS

Our findings support a positive affect of ATL on patient concerns and HRQOL in refractory temporal lobe epilepsy, although longitudinal studies are needed to corroborate these results. Mood, employment, driving ability, and AED use are important postoperative predictors of HRQOL.

The Spanish Version of the Quality-of-Life in Epilepsy Inventory (QOLIE-31): translation, validity, and reliability

PURPOSE

Spanish adaptation of the Quality of Life in Epilepsy Inventory (QOLIE-31).

METHODS

Internal consistency and construct validity of the Spanish translation of the QOLIE-31 were tested in 252 patients with epilepsy. Patients also were administered the General Health Questionnaire (GHQ-28), and the Nottingham Health Profile (NHP). Two weeks after the first test, a subgroup of randomly selected patients were readministered the QOLIE-31 along with a new five-option question about change in health status. Patients reporting no change in health status were included in the study of temporal stability. Sensitivity to clinical change was assessed in 31 additional patients who had successfully undergone epilepsy surgery.

RESULTS

The QOLIE-31 was highly correlated with the GHQ-28 (r = -0.63) and the NHP (r = -0.69), demonstrating construct validity. Cronbach's alpha coefficient was 0.92, showing the items of the QOLIE-31 to be interdependent and homogeneous. For a 2-week test retest, both Pearson product-moment correlation and intraclass correlation coefficients were 0.90, indicating temporal stability. Sensitivity to clinical change was suggested by a significant mean difference between the global scores both before and after epilepsy surgery (-21.87, p<0.0001; 95% CI, -28.08 to -15.66). The standardized response mean of the global score was 1.67, and the effect size was 1.35, both indicating large clinical change as a result of seizure relief.

CONCLUSIONS

The similarity of psychometric properties between the English and the Spanish versions of the QOLIE-31 supports their conceptual equivalence. The questionnaire's responsiveness to clinical change suggests its utility in outcome assessment of drug trials and epilepsy surgery.

Agreement and correctness in adjusting antiepileptic drug treatment: a need for rational drug treatment?

PURPOSE

To study interobserver variation in treatment decisions in a first follow-up contact after initiation of antiepileptic drug (AED) treatment. The results should aid us in the assessment of whether decision support can be of value in this situation.

METHODS

Data from patient records were used to construct 270 different test cases containing information about the course of the disease after initiation of drug treatment. The cases were presented to five neurologists from different general hospitals who previously agreed about the diagnosis and the initial treatment for these cases. They were asked to write a prescription for each test case.

RESULTS

All five neurologists agreed on a treatment decision in 21.9% of the 265 cases available for analysis. Each neurologist made a decision different from the decisions taken by all other neurologists in 14.0-19.6% of the cases. Kappa values for agreement among individual neurologists as well as for agreement between an individual and the group of his peers were low. In 82.6% of the cases, a majority of the neurologists agreed on a treatment decision. Comparing the decisions of individual neurologists with the majority decision reference (219 cases) showed a significant difference in correctness (range, 67.1-82.6%) among the neurologists.

CONCLUSIONS

The fact that a majority decision could be reached in a considerable number of cases, as well as the variability in adjustment of an initiated drug treatment, leads us to the conclusion that decision support can contribute to a rational adjustment of drug treatment.

An evaluation of the impact of health worker and patient education on the care and compliance of patients with epilepsy in Zimbabwe

PURPOSE

The use of primary health care personnel to identify cases of epilepsy and initiate simple treatment protocols has been advocated as a solution to the numeric inadequacy and uneven distribution of medical manpower available for the management of epilepsy in developing countries. This study sought to evaluate the effectiveness of primary health care nurses in the diagnosis and management of epilepsy, as well as the impact of patient-information pamphlets on drug compliance and clinic attendance of patients with epilepsy.

METHODS

Primary health care workers from 24 clinics in the Zvimba district in Zimbabwe attended a workshop to improving their knowledge in the diagnosis and management of generalized tonic-clonic seizures. Half of these clinics (experimental group) subsequently received patient-information pamphlets for distribution to patients and relatives, whereas the other half (control group) did not. Frequency of clinic attendance, mean seizure frequencies, and mean serum levels of phenobarbitone were compared at baseline and at 6 months after intervention in patients within each group, and at 6 months after intervention between both groups.

RESULTS

Community health worker education led to a 74% increase in patient recruitment as well as a marked improvement in patient drug compliance over the 6-month study period. The use of patient-information pamphlets led to a marked reduction in patient default from clinic follow-up, but did not appear to influence drug compliance or seizure frequency.

CONCLUSIONS

The benefits of these simple and inexpensive interventions make a strong case for their widespread implementation for improved epilepsy care not only in Zimbabwe, but also in other developing countries.

[Quality of life of patients after epilepsy surgery]

Drug resistant epilepsy impairs patients' quality of life making social interaction more difficult. Surgical treatment is an option for seizure control in medically refractory patients. We evaluated pre-operative and post-operative quality of life using a standardized questionnaire based on the QOLIE-10. The questionnaire included ten questions dealing with psychosocial and drug's side effects and was applied before surgery and eight months post-operatively. The studied sample comprised twelve consecutive adult patients with epilepsy treated surgically who were seizure free. Differences were found between the pre-operative and post-operative periods in 70% of the questions, with a better post-operative profile. Successful epilepsy surgery has a great impact in the quality of life of these patients.

Quality of life and personality in adults with epilepsy

PURPOSE

This study was undertaken to understand the quality of life, personality, and associated factors in patients with epilepsy.

METHODS

117 patients with epilepsy and 84 healthy people were studied and tested using the Social Support Scale, the General Well-being Schedule, the Life-Event Scale, the Behavior Pattern Scale, and the Eysenck Personality Questionnaire (EPQ).

RESULTS

There were no significant differences between the patients with epilepsy and the control group in the Social Support Scale results. The General Well-being Schedule scores were lower for the case patients than for the control group (p < 0.01). Scores for patients with frequent seizures (once a month or more) were lower than those without frequent seizures (less than once per month). The case patients had higher negative scores in the family-related problem section of the Life Events Scale, compared with the control group (p < 0.05). The patients with epilepsy were also more likely to lie (p < 0.05); their emotions were more changeable (p < 0.01), and their character more introverted (p < 0.05), although their behavior patterns were similar to the controls. We also studied associated factors related to personality, general well-being, and familial-negative life-events.

CONCLUSIONS

These results provide information about patients with epilepsy that may be useful in their psychological treatment.

Secondary epileptogenesis in humans

Secondary epileptogenesis as it applies to humans remains a controversial topic despite 40 years of investigation. Part of the controversy stems from disagreement about the definition of secondary epileptogenesis, and part of the controversy stems from the imperfect fit of animal models to the human epileptic syndromes. It may be that models of secondary epileptogenesis can be useful to describe specific epileptic syndromes such as bitemporal epilepsy and secondary bilateral synchrony, but other models may be required for remitting syndromes such as the Landau-Kleffner syndrome. The concept of secondary epileptogenesis may also provide a useful construct for evaluating patients with partial epileptic syndromes, especially those under consideration for epilepsy surgery, and for the evaluation of preventive strategies in epilepsy.

Seizure severity in children with epilepsy: a parent-completed scale compared with clinical data

PURPOSE

We wished to compare a parent-completed scale quantifying seizure severity (SS) in children with various seizure types with the clinicians' impression of SS and other clinical data.

METHODS

The parents of 117 children with recurrent seizures completed a 13-item, subjective scale (The Hague Seizure Severity Scale, HASS). Eight treating neurologists quantified SS on a 10-point Visual Analog Scale (VAS) and supplied other clinical data.

RESULTS

Both the HASS and the VAS assessments of SS showed considerable variation within one seizure type. Significant differences were noted between groups with (a) absences and simple partial seizures (SPS), (b) complex partial seizures (CPS), and (c) generalized tonic-clonic seizures (GTCS). The correlation coefficient between the neurologists' and the parents' scores was 0.45 but did not exceed 0.26 after stratification for seizure type. The parents' score was not substantially influenced by various other clinical variables. The neurologists' score was correlated with resistance to treatment and presence of mental retardation.

CONCLUSIONS

The SS ratings of the parents and the neurologists were not substantially correlated. The consideration that parents, as eyewitnesses to the seizures, are probably better judges of SS than clinicians may favor the use of a parent-completed scale to quantify SS. The HASS is a valid and reliable measure of parent-perceived SS that can be useful as an outcome measure in childhood epilepsy.

Patient-validated content of epilepsy-specific quality-of-life measurement

PURPOSE

To study the effects of epilepsy from the patients' perspective and assist determination of content validity of health-related quality-of-life (HRQOL) measures.

METHODS

We asked 81 consecutive patients with moderately severe epilepsy to list in order of importance their concerns of living with recurrent seizures. To minimize investigator bias, patients completed the procedure in a private setting without staff involvement.

RESULTS

Twenty-four distinct domains were generated by the patients. Concerns about driving (64%), independence (54%), employment (51%), social embarrassment (36%), medication dependence (33%), mood/stress (32%), and safety (31%) each were listed by > 30% of patients. Driving was listed as the most important concern by 28% of patients, followed by employment (21%), independence (9%), safety (6%), antiepileptic-drug side effects (5%), seizure unpredictability (5%), and seizure aversion (5%).

CONCLUSIONS

The effect of epilepsy on HRQOL is not vague or obscure from the patients' perspective but is defined by a limited number of domains. Independence is an important concern that may not be evaluated adequately by currently available HRQOL instruments.

Neuropsychologic assessment in surgical treatment of epilepsy

Neuropsychologic assessment has long been an integral part of evaluation for surgical treatment of epilepsy. Neuropsychologic evaluation and consultation continue to be an important part of the assessment for operative intervention for epilepsy, but the role of neuropsychology has changed over time. At one time, neuropsychologic assessment assumed a diagnostic role in preoperative evaluation for epilepsy and also contributed to the lateralization and localization of the seizure focus. Sophisticated electroencephalographic techniques and especially neuroimaging have revolutionized the diagnosis and management in epilepsy surgical treatment centers. Although still helpful, neuropsychology no longer has a major role in lateralization or localization of seizure onset. This report describes neuropsychologic evaluation and its current role in surgical treatment of epilepsy. The characteristics and purposes of neuropsychologic assessment and Wada testing (intracarotid injection of amobarbital) are described. Current research on assessment of emotional adjustment and on its predictors before and after surgical therapy for epilepsy is reviewed. Finally, the risk for neuropsychologic decline after temporal lobectomy is discussed in light of recent research on preoperative memory, hippocampal pathologic lesions, and quantitative neuroimaging data.

Outcome assessment in epilepsy: available rating scales for adults and methodological issues pertaining to the development of scales for childhood epilepsy

During the past decade, several scales have been developed to improve the assessment of outcome in epilepsy. These scales were developed for adults and their reliability, validity and usefulness have been established. However, there is also a need for alternative measures of outcome in childhood epilepsy, especially a measure of seizure severity (SS) and measures pertaining to quality of life (QoL). Four of these adult scales are reviewed and compared to examine their applicability in childhood epilepsy. Two important methodological differences between them are discussed: (a) patient self-report vs. physician-based scales and (b) generic vs. disease-specific instruments. QoL in epilepsy is briefly reviewed. Severity of seizures and severity of side-effects are relatively neglected areas of importance to QoL in epilepsy. The existing instruments for adults are not appropriate for children in their present form. Some specific methodological issues, which are relevant for the development of scales for children with epilepsy, are subsequently discussed. New scales pertaining to physical and psychosocial aspects of QoL in childhood epilepsy are being developed. In the near future, data on their reliability, validity and usefulness will become available. A combination of scales focusing on specific aspects of QoL, including SS and severity of adverse effects, and more traditional clinical data may provide a more complete assessment of outcome in childhood epilepsy.

Objective measure of treatment outcome in epilepsy

Treatment outcome in epilepsy is too often a vague, ill-defined subjective measure. Based on a proposal of Shoffer and Temkin (1987) of "time to kth seizure" as a measure of seizure frequency, we devised the formula: % improvement = 100 - [time to X seizure (i*) x 100]/ [time to X seizure (f*)]. This formula provides an objective measure of treatment outcome and should prove useful in clinical settings and research. We offer examples of practical applications of the formula.

A brief questionnaire to screen for quality of life in epilepsy: the QOLIE-10

PURPOSE

To evaluate a brief questionnaire to screen aspects of health-related quality of life for persons with epilepsy.

METHODS

A study of 304 adults with epilepsy was undertaken at 25 seizure clinics in the United States. It was used for derivation of a brief screening tool from a longer instrument (QOLIE-89).

RESULTS

The 10-item questionnaire (QOLIE-10) covers general and epilepsy-specific domains, grouped into three factors: Epilepsy Effects (memory, physical effects, and mental effects of medication), Mental Health (energy, depression, overall quality of life), and Role Functioning (seizure worry, work, driving, social limits). Scale scores were significantly different among seizure groups (p = 0.003).

CONCLUSIONS

The QOLIE-10 can be completed by a patient in several minutes and reviewed rapidly by the physician. This screening tool could provide potentially useful information for initial assessment or follow-up of problem areas that are not commonly evaluated during routine clinical visits with patients with epilepsy.

Quality of life and life satisfaction in families after a child has undergone corpus callostomy

Epilepsy is a chronic neurological condition which can have a detrimen tal effect on patients' quality of life (QOL). We evaluated the overall satisfaction with QOL and changes in QOL in 25 families with children who had undergone corpus callostomy for severe epilepsy. The mean age of seizure onset was 3.4 years, and the mean period from seizure onset to operation was 5.2 years. Mean follow-up was 19.3 months. Twenty of 22 patients had various degrees of mental retardation. Mean reduction in severity of seizure activity was 64%. Nineteen of 25 (76%) parents were satisfied with the surgical result. Eighteen of 25 parents (72%) described a good level of satisfaction with their families QOL after callostomy. Reduction in severity of seizure activity was significantly correlated with how successful families considered the surgery to be and how satisfied they were with their QOL (r = 0.72 and 0.77, respectively). Life domains showing one greatest improvement after callostomy included level of self-care, family life, and school performance. Improvements in level of self-care, family life, and school performance were associated with higher levels of life satisfaction (r = 0.69, 0.60, and 0.59, respectively). Hyperactivity, attention span, and social skills improved significantly in 11 patients after surgery. Callostomy did not improve mental performance. We conclude that improved seizure control after callostomy is also associated with improved QOL.

The evolution of health-related quality of life assessment in epilepsy

The purpose of this article is to review the ways in which quality of life has been assessed in patients with epilepsy. It is specifically proposed that there have been three phases or types of studies examining the effects of epilepsy on cognitive, behavioural, social and physical function. The first and oldest phase was characterized by the use of traditional forms of clinical evaluation and available generic measures of cognitive, behavioural and psychosocial function to study the general effects of epilepsy, effects of epilepsy-specific clinical variables (e.g. seizure type, age at onset), and the consequences of treatment with antiepileptic medications on patients' lives. The second phase of research was characterized by the development of epilepsy-specific measures of cognitive ability, psychological status and psychosocial status, which were designed to meet the special research and clinical needs not provided by previous generic measures (e.g. Washington Psychosocial Seizure Inventory, Fear of Seizures Scale). The third and most recent phase is characterized by the use of models, techniques, and measures developed from the health services research field to assess formally contemporary definitions of health-related quality of life (HRQOL) (e.g. ESI-55, QOLIE-89, Seizure Severity Scale) and develop models of the effects of epilepsy on HRQOL. Thus, concern regarding the impact and consequences of epilepsy is not a new development, but has evolved over the years, resulting in new models and methods of assessment of disease impact on well-being and functional status.