Psychosocial long-term outcome in patients with psychogenic non-epileptic seizures

Young people diagnosed with psychogenic nonepileptic seizures (PNES) years ago - How are they now?

BACKGROUND

Up to 30% of patients referred to epilepsy centres for drug-resistant epilepsy turn out to have psychogenic nonepileptic seizures (PNES). Patients with PNES are a very heterogeneous population with large differences in regard to underlying causes, seizures severity, and impact on quality of life. There is limited knowledge regarding the long-term seizure prognosis of youth with PNES and its influential factors.

METHODS

We have performed a retrospective study on adolescents diagnosed with PNES who were receiving inpatient care at our hospital for 2-4 weeks in the period of 2012-2020. They all attended psychoeducational courses to educate them about PNES, coping with the seizures, and possible contributors to seizure susceptibility. There were 258 patients who fulfilled the inclusion criteria. We contacted them by text messages, through which they received brief information about the study and an invitation to participate. There were 62 patients (24 %) who agreed and participated in structured telephone interviews. We excluded 10 patients due to concomitant epilepsy. The mean age of the remaining 52 participants was 20.9 years (16-28 years), and 45 (87 %) were women.

RESULTS

After a mean of 4.7 years (2-9 years) since discharge from our hospital, 28 patients (54 %) had been free of seizures in the last 6 months. There were 16 patients (31 %) who had better situations in regard to seizures but were not completely seizure free, while 8 patients (15 %) were either unchanged (3 patients) or worse (5 patients). There were 39 patients (75 %) who had received conversation therapy, and 37 patients (71 %) had been treated by a psychologist or psychiatrist. There were 10 patients (19 %) who had dropped out of school or work, and the percentage increased with age. There were 42 patients (80 %) who perceived their health as good or very good.

CONCLUSION

Patients had a relatively favourable seizure prognosis as 54% were free of seizures and 31% had a better seizure situation, at the time of this study. However, the fact that 19% had dropped out of school or work was worrying. Young age and satisfaction with treatment were associated with being employed or receiving education. Satisfaction with perceived treatment was significantly associated with personal experience of good health. This emphasizes the importance of early diagnosis, adapted interventional measures, and long-term follow-up by healthcare for young people with PNES.

Long-term course of psychogenic nonepileptic seizures: Who gets seizure-free, has better functional level and higher health-related quality of life?

BACKGROUND

The disease course of psychogenic nonepileptic seizures (PNES) over a prolonged period of time remains unclear. The aims of the study were: 1. to describe the course of illness with a median follow-up time of 4 years and a range of 2-15 years; and 2. to identify distinguishing features between participants regarding seizure cessation, functional level and health-related quality of life.

METHODS

Formerly, inpatients of an epileptic ward diagnosed with PNES between 2000 and 2013 were contacted via mail. They were asked by questionnaire about illness characteristics, i.e., age at onset, PNES status at onset and in the course, treatments, psychosocial situation, and quality of life status.

RESULTS

Two-thirds of the N = 63 formerly inpatients were female, their age at onset was 26.7 years. Seizure frequency decreased significantly over time, 31.7% were currently seizure-free, but still only 37% were regularly employed. Only 48% had a satisfying health-related quality of life. The remitted participants had a shorter duration of illness and higher health-related quality of life. Participants with a good level of functioning were more likely to be male, took fewer medications, and had a higher health-related quality of life. Those participants with higher quality of life were more frequently employed and had fewer seizures.

CONCLUSIONS

As participants continue to be severely limited in their functional level and quality of life over the period under review, enhanced treatment approaches that address experiential avoidance seem to be needed.

Economic Cost of Functional Neurologic Disorders: A Systematic Review

BACKGROUND AND OBJECTIVES

Functional neurologic disorder (FND) represents genuine involuntary neurologic symptoms and signs including seizures, weakness, and sensory disturbance, which have characteristic clinical features, and represent a problem of voluntary control and perception despite normal basic structure of the nervous system. The historical view of FND as a diagnosis of exclusion can lead to unnecessary health care resource utilization and high direct and indirect economic costs. A systematic review was performed using Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines to assess these economic costs and to assess for any cost-effective treatments.

METHODS

We searched electronic databases (PubMed, PsycInfo, MEDLINE, EMBASE, and the National Health Service Economic Evaluations Database of the University of York) for original, primary research publications between inception of the databases and April 8, 2022. A hand search of conference abstracts was also conducted. Key search terms included "functional neurologic disorder," "conversion disorder," and "functional seizures." Reviews, case reports, case series, and qualitative studies were excluded. We performed a descriptive and qualitative thematic analysis of the resulting studies.

RESULTS

The search resulted in a total of 3,244 studies. Sixteen studies were included after screening and exclusion of duplicates. These included the following: cost-of-illness (COI) studies that were conducted alongside cohort studies without intervention and those that included a comparator group, for example, another neurologic disorder (n = 4); COI studies that were conducted alongside cohort studies without intervention and those that did not include a comparator group (n = 4); economic evaluations of interventions that were either pre-post cohort studies (n = 6) or randomized controlled trials (n = 2). Of these, 5 studies assessed active interventions, and 3 studies assessed costs before and after a definitive diagnosis of FND. Studies showed an excess annual cost associated with FND (range $4,964-$86,722 2021 US dollars), which consisted of both direct and large indirect costs. Studies showed promise that interventions, including provision of a definitive diagnosis, could reduce this cost (range 9%-90.7%). No cost-effective treatments were identified. Study comparison was limited by study design and location heterogeneity.

DISCUSSION

FND is associated with a significant use of health care resources, resulting in economic costs to both the patient and the taxpayer and intangible losses. Interventions, including accurate diagnosis, seem to offer an avenue toward reducing these costs.

Prospective multicenter cohort study of possible psychogenic nonepileptic seizure cases-Results at 1-year follow-up examinations

OBJECTIVE

The primary purpose of this prospective multicenter study was to examine clinical and demographic feature differences according to the diagnostic level of psychogenic nonepileptic seizures (PNES) and then clarify whether prognosis may also differ accordingly.

METHODS

Two hundred forty-two consecutive patients strongly suspected of having PNES attacks were invited to participate, of whom 52 did not consent or contact was lost. At the 1-year follow-up examination, PNES diagnosis was reconsidered in nine patients. In 96 patients, the diagnostic level remained the same (P-group), with that in 43 considered to be clinically established (CE-group) and in 42 documented (D-group). The Qolie-10 and NDDI-E questionnaires were examined at both the study entry and the follow-up examination.

RESULTS

Multiple regression analysis of quality of life (QoL) score (n = 173; R²  = 0.374; F = 7.349; P < 0.001) revealed NDDI-E score (t = -6.402; P < 0.001), age of PNES onset (t = -3.026; P = 0.003), and ethnic minority status (t = 3.068; P = 0.003) as significant contributors. At entry, the P-group showed the lowest PNES attack frequency (P < 0.000), the lowest rate of antiseizure, antidepressant, and antipsychotic medication (P < 0.000; P = 0.031; P = 0.013, respectively), and the lowest proportion of psychosis (P = 0.046). At follow-up, PNES attack frequency (P < 0.000), number of admittances to emergency room (P < 0.000), and scores for QoL (P < 0.000) as well as depression (P = 0.004) were found to be significantly improved together with other collateral indicators, such as rate of antiseizure medication prescription (P = 0.001) and psychiatric symptoms (P = 0.03). Multiple regression analysis of a sample limited to patients with intellectual disability (ID) (n = 44; R²  = 0.366; F = 4.493; P = 0.002) revealed continued psychotherapy at follow-up (t = 2.610, P = 0.013) and successful reduction in antiseizure medication (t = 2.868; P = 0.007) as positively related with improved QoL.

SIGNIFICANCE

Clinical and the socio-psychological constellation of possible, clinically established, and documented PNES were found to differ greatly. Unexpectedly, significant effects of the continuous psychotherapeutic intervention were confirmed in PNES patients with ID.

Quality of Life in Psychogenic Nonepileptic Seizures: An Evolutionary Concept Analysis

Psychogenic nonepileptic seizures (PNES) pose a serious threat to quality of life (QOL) in patients who battle the disorder. As psychological treatment options have progressed, improvement in QOL has become a more common desired outcome. Despite its relevance in PNES research and treatment, QOL has not been defined in the PNES population. Rodgers' Evolutionary Method of concept analysis was used to analyze 47 articles and clarify the concept of QOL in PNES. QOL in PNES is subjective, multidimensional, associated with symptoms, and dynamic in nature. This conceptualization of QOL in PNES may be useful in future PNES research and treatment.

Treatment of Psychogenic Nonepileptic Seizures

PURPOSE OF REVIEW

Psychogenic nonepileptic seizures (PNES) are the most common Functional Neurological Disorder/Conversion Disorder subtype. Significant advances have been made related to diagnosis, neurobiology, and treatment. In this review, we summarize updates in diagnosis and management over the past 3 years.

RECENT FINDINGS

Although evidence is mixed for the treatment of PNES, psychotherapeutic modalities remain a powerful instrument to empower patients and reduce seizures. A multidisciplinary, holistic approach is beneficial. While seizure freedom in all patients may not be the achieved endpoint in this chronic, paroxysmal disorder, quality of life can be improved with treatment. Additional treatment modalities and further research are needed for patients who are refractory to current treatment. Evidence-based therapies exist for PNES, and recent findings represent an increased understanding of the clinical and neurophysiologic aspects of PNES.

Psychogenic nonepileptic seizures: clinical characteristics and outcome

BACKGROUND

Clinical characteristics, outpatient situation, and outcome in patients with psychogenic nonepileptic seizures (PNES) remain to be elucidated.

METHODS

Patients diagnosed with PNES after video-electroencephalography (EEG) monitoring (VEM) 03/2000-01/2016 at the Erlangen Epilepsy Center were surveyed between June 2016 and February 2017. Primary outcome was PNES cessation defined as no PNES episodes within > = 12 months prior to the interview. Secondary outcome variables included quality of life (QoL) and dependency. Sensitivity analysis included patients with proven PNES during VEM without comorbid epilepsy.

RESULTS

Ninety-nine patients were included (median age 38 (interquartile range (IQR 29-52)) years; 68 (69%) females, follow-up 4 (IQR 2.1-7.7) years). Twenty-eight (28%) patients suffered from comorbid epilepsy. Twenty-five (25%) patients reported PNES cessation. Older age at symptom onset (odds ratio (OR) related to PNES cessation: 0.95 (95% CI 0.90-0.99)), comorbid epilepsy (OR 0.16 (95% CI 0.03-0.83)), anxiety disorder (OR 0.15 (95% CI 0.04-0.61)), and tongue biting (OR 0.22 (95% CI 0.03-0.91)) remained independently associated with ongoing PNES activity after adjustment. Sensitivity analysis (n = 63) revealed depressive disorder (OR 0.03 (95% CI 0.003-0.34)) instead of anxiety as independent predictor, while this seemed relevant only in patients older than 26 years at onset (OR 0.04 (95% CI 0.002-0.78) versus OR 0.21 (95% CI 0.02-1.84) in patients  younger than 26 years). PNES cessation was associated with increased median QoL (8 (IQR 7-9) versus 5.5 (IQR 4-7); p < .001) and an increased frequency of financial independency (14 (56%) versus 21 (28%); p = .01).

CONCLUSIONS

We found poor outcomes in PNES especially in older patients at onset with comorbid depressive disorder. Comorbid epilepsy also seems to be a major risk factor of ongoing PNES activity, which in turn affects patients' daily living.

Diagnostic Yield of 8-Hour Video-EEG in Detecting Psychogenic Non-Epileptic Seizures (PNES)

To evaluate the diagnostic yield of the first 8 hours of video-EEG (vEEG) monitoring in detecting Psychogenic Non-Epileptic Seizures (PNES) during the Epilepsy Monitoring Unit (EMU) admission. We performed a retrospective chart review of patients ages ≥4 years who were admitted to the EMU between 2011 and 2018 (n = 616). We calculated the proportion of patients diagnosed with PNES within the first 8 hours of EEG recording and studied the associated risk factors for patients diagnosed with PNES and patients with epileptic seizures (ES). Out of the total 616 patients, 24% (149) patients had an EMU diagnosis of PNES. Of these, 44.3% had at least one typical event within the first 8 hours of vEEG monitoring. A higher incidence was seen within the pediatric subgroup (54.8% had an event within 8 hours). A diagnosis of chronic pain disorder was more common with PNES compared to ES (48.3% versus 16.5%, p < 0.001). A suspicion for PNES documented during an office visit was noted in a high proportion of patients (68.5%) who eventually had a PNES event during EMU. Our study suggests that in a well-selected group of patients (such as a high suspicion of PNES during a physician/neurology office visit), an outpatient 8-hour vEEG could open new avenues for a prompt diagnosis. This could especially be beneficial in hospital settings where there is either a lack of an EMU or a delay in admission to the EMU.