Autonomic symptoms following Zika virus infection

Purpose

To determine if autonomic symptoms are associated with previous Zika virus infection.

Methods

Case–control study including 35 patients with Zika virus infection without evidence of neurological disease and 105 controls. Symptoms of autonomic dysfunction were assessed with the composite autonomic symptom scale 31 (COMPASS-31).

Results

Patients with previous Zika virus infection had significantly higher COMPASS-31 score than controls regardless of age and sex (p = 0.007). The main drivers for the higher scores where orthostatic intolerance (p = 0.003), secretomotor (p = 0.04) and bladder symptoms (p < 0.001).

Conclusion

Zika virus infection is associated with autonomic dysfunction. The mechanisms remain to be elucidated.

     

Pilot study of enhanced social support with automated telephone monitoring after psychiatric hospitalization for depression

Background

Following discharge, patients hospitalized for depression are at high risk for poor retention in outpatient care and adverse outcomes.

Aims

Pilot tests a post-hospital monitoring and enhanced support program for depression.

Method

48 patients at a Veterans Affairs Medical Center discharged following a depression-related inpatient stay received weekly visits or phone calls for 6 months from their choice of either a family member/friend (n = 19) or a certified peer support specialist (n = 29). Participants also completed weekly automated telephone monitoring calls assessing depressive symptoms and antidepressant medication adherence.

Results

Over 90% of participants were more satisfied with their care due to the service. The mean change from baseline to 6 months in depression symptoms was ?7.9 (p < 0.05) according to the Patient Health Questionnaire and ?11.2 (p < 0.05) according to the Beck Depression Inventory-II for those supported by a family member/friend, whereas those supported by a peer specialist had mean changes of ?3.5 (p < 0.05) and ?1.7 (p > 0.10), respectively.

Conclusions

Increased contact with a chosen support person coupled with automated telephone monitoring after psychiatric hospitalization is an acceptable service for patients with depression. Those who received the service, and particularly those supported by a family member/friend, experienced reductions in symptoms of depression.

     

Heart-rate response to alpha<Subscript>2</Subscript>-adrenergic receptor antagonism by antipsychotics

Purpose

To explore the relationship between antipsychotic-associated antagonism of alpha₂-adrenergic receptors and resting heart rate in individuals with schizophrenia.

Methods

Thirty-one inpatients treated with antipsychotics were included in this exploratory analysis. Antipsychotic doses were converted to haloperidol equivalents for alpha₂-adrenergic receptor antagonism. Resting heart rate was measured with the patient in the seated upright posture.

Results

After controlling for confounding variables, the relationship between alpha₂-adrenergic receptor antagonism and resting heart rate demonstrated a positive linear effect (P = 0.002) as well as a nonlinear effect that accounted for an additional 14% of the variability in resting heart rate (P = 0.005).

Conclusion

The observed inverted-U relationship between alpha₂-adrenergic receptor antagonism and resting heart rate can possibly be attributed to an altered response of beta₁-adrenergic receptors to increased norepinephrine release. Further investigations are required to confirm this exploratory finding, taking into account additional variables that include other receptors which either directly or indirectly influence heart rate.

ClinicalTrials.gov Identifier

NCT01392885.

     

Onset of bladder and motor symptoms in multiple system atrophy: differences according to phenotype

Purpose

To compare the order of presentation of bladder and motor symptoms between multiple system atrophy phenotypes.

Methods

Medical records were retrospectively reviewed in 144 patients.

Results

Bladder symptoms occurred either before or within 12 months after onset of motor symptoms in significantly more patients with the cerebellar phenotype than the parkinsonian phenotype (80 vs. 53%, p = 0.003); similar results were observed for urinary incontinence (79 vs. 45%, p = 0.001).

Conclusions

Urinary dysfunction is more likely to appear either before or shortly after motor symptoms in the cerebellar phenotype than in the parkinsonian phenotype.

     

Socioeconomic Status Interacts with Conscientiousness and Neuroticism to Predict Circulating Concentrations of Inflammatory Markers

Background

Socioeconomic health disparities research may benefit from further consideration of dispositional factors potentially modifying risk associated with low socioeconomic status, including that indexed by systemic inflammation.

Purpose

This study was conducted to investigate interactions of SES and the Five-Factor Model (FFM) personality traits in predicting circulating concentrations of the inflammatory markers interleukin-6 (IL-6) and C-reactive protein (CRP).

Method

Using a sample of middle-aged and older adults from the Midlife in the United States Survey (MIDUS) biomarker project (N = 978), linear regression models tested interactions of each FFM trait with a composite measure of SES in predicting IL-6 and CRP, as well as the explanatory role of medical morbidity, measures of adiposity, and health behaviors.

Results

SES interacted with conscientiousness to predict levels of IL-6 (interaction b = .03, p = .002) and CRP (interaction b = .04, p = .014) and with neuroticism to predict IL-6 (interaction b = ?.03, p = .004). Socioeconomic gradients in both markers were smaller at higher levels of conscientiousness. Conversely, the socioeconomic gradient in IL-6 was larger at higher levels of neuroticism. Viewed from the perspective of SES as the moderator, neuroticism was positively related to IL-6 at low levels of SES but negatively related at high SES. Interactions of SES with both conscientiousness and neuroticism were attenuated upon adjustment for measures of adiposity.

Conclusions

Conscientiousness may buffer, and neuroticism amplify, excess inflammatory risk associated with low SES, in part through relationships with adiposity. Neuroticism may be associated with lower levels of inflammation at high levels of SES.

     

Examining changes in personality disorder and symptomology in an adolescent sample receiving intensive mentalization based treatment: a pilot study

Objective

To examine changes in personality disorders and symptomology and the relation between personality disorder variables and treatment outcomes in an adolescent sample during partial residential mentalization based treatment.

Methods

In a sample of 62 (out of 115) adolescents treated for personality disorders, assessment was done pre- and post-treatment using the Structured Clinical Interview for DSM personality disorders and the Symptom Check List 90.

Results

Significant reductions in personality disorder traits (t = 8.36, p = .000) and symptoms (t = 5.95, p = .000) were found. During pre-treatment, 91.8% (n = 56) of the patients had one or more personality disorders, compared to 35.4% (n = 22) at post-treatment. Symptom reduction was not related to pre-treatment personality disorder variables.

Conclusion

During intensive psychotherapy, personality disorders and symptoms may diminish. Future studies should evaluate whether the outcomes obtained are the result of the treatment given or other factors.

     

A meta-analysis of HIV and heart rate variability in the era of antiretroviral therapy

Background

Heart rate variability (HRV) has been used to assess autonomic dysfunction since the beginning of the HIV epidemic. Although autonomic failure was commonly detected in HIV and AIDS patients prior to the advent of antiretroviral therapy (ART), the effect of HIV on HRV in the current era of widespread ART availability is more ambiguous.

Methods

A systematic search and review was conducted on cross-sectional observational and case–control studies published in the era of ART (1996–2015) that compared HRV between HIV + individuals treated with ART and HIV ? controls. Eight out of the 20 studies identified, enrolling a total of 292 HIV + adults (mean age 38.7 years) and 201 HIV seronegative controls (mean age 35.1 years), were included in a meta-analysis based on stringent methodological criteria.

Results

At rest, individuals with HIV showed lower HRV in the time (g) = ?0.72, 95 % CI (?1.03 to ?0.42) and low-frequency (LF) domain (g) = ?0.51, (?0.81 to ?0.21); markers of lower parasympathetic tone in the time (g) = ?0.55, (?0.85 to ?0.25) and high-frequency (HF) domain (g) = ?0.42, (?0.71 to ?0.12); and higher LF:HF ratio (g) = 0.46, (0.12–0.86) in the frequency domain, suggestive of parasympathetic withdrawal.

Conclusion

This meta-analysis confirmed, within a relatively young cohort of HIV + adults on ART, a general reduction in autonomic function with a shift toward sympathetic dominance. This shift may predispose HIV patients to early and elevated risk of arrhythmias, cardiac events, and accelerated HIV disease progression.

     

“What Goes Around Comes Around”: Antecedents,Mediators, and Consequences of Controlling vs. Need-Supportive Motivational Strategies Used by Exercise Professionals

Background

Research into the factors associated with the use of different motivational strategies by exercise professionals is of empirical and practical utility.

Purpose

Grounded in self-determination theory, this study sought to analyze putative antecedents, mediators, and work-related well- and ill-being consequences of two types of motivational strategies reported by exercise professionals.

Methods

Participants were 366 exercise professionals (193 males; experience = 7.7 ± 5.8 years). Questionnaires assessing psychological need satisfaction frustration, self-determined work motivation, motivational strategies (need-supportive vs. controlling), emotional exhaustion, and personal accomplishment were completed online. Path analysis was used to test the hypothesized model.

Results

Model with good fit [χ ² (5) = 9.174, p> .05; CFI = .984; TLI = .936; RMSEA = .048; SRMR = .022] showed need satisfaction as positively associated with supportive strategies and personal accomplishment (β between .267 and .399) and negatively with emotional exhaustion (β = ?.145). Need frustration was negatively associated with work motivation and personal accomplishment (β = ?.315; ?.176), and positively with controlling strategies and emotional exhaustion (β = .195; .226). Furthermore, supportive strategies and work motivation were positively associated with personal accomplishment (β = .134; .184), whereas controlling strategies were positively associated with emotional exhaustion (β = .178).

Conclusions

Findings have theoretical implications, providing evidence of need satisfaction and frustration as being differently associated with work-related motivation, type of strategies used, and work-related emotional outcomes. Practical implications convey the importance of these variables in relation to the standard of motivational strategies provided and their role on work-related well- and ill-being indicators.

     

Intervention Mediators in a Randomized Controlled Trial to Increase Colonoscopy Uptake Among Individuals at Increased Risk of Familial Colorectal Cancer

Background

Understanding the pathways by which interventions achieve behavioral change is important for optimizing intervention strategies.

Purpose

We examined mediators of behavior change in a tailored-risk communication intervention that increased guideline-based colorectal cancer screening among individuals at increased familial risk.

Methods

Participants at increased familial risk for colorectal cancer (N = 481) were randomized to one of two arms: (1) a remote, tailored-risk communication intervention (Tele-Cancer Risk Assessment and Evaluation (TeleCARE)) or (2) a mailed educational brochure intervention.

Results

Structural equation modeling showed that participants in TeleCARE were more likely to get a colonoscopy. The effect was partially mediated through perceived threat (β = 0.12, p < 0.05), efficacy beliefs (β = 0.12, p < 0.05), emotions (β = 0.22, p < 0.001), and behavioral intentions (β = 0.24, p < 0.001). Model fit was very good: comparative fit index = 0.95, root-mean-square error of approximation = 0.05, and standardized root-mean-square residual = 0.08.

Conclusion

Evaluating mediating variables between an intervention (TeleCARE) and a primary outcome (colonoscopy) contributes to our understanding of underlying mechanisms that lead to health behavior change, thus leading to better informed and designed future interventions.

Trial Registration Number

ClinicalTrials.gov, NCT01274143.

     

Association between cerebral dopamine neurotrophic factor (<Emphasis Type="Italic">CDNF</Emphasis>) 2 polymorphisms and schizophrenia susceptibility and symptoms in the Han Chinese population

Background

Schizophrenia (SZ) is a complex polygenic psychiatric disorder caused in part by abnormal dopamine levels. Cerebral dopamine neurotrophic factor (CDNF) 2 is known to protect and repair the dopaminergic system. Dopamine dysfunction is one of the pathogenesis of SZ. However, the relationship between CDNF2 and SZ has not been previously investigated. We speculated that CDNF2 may be a susceptibility factor for SZ.

Methods

To address this issue, we carried out a study to investigate the association between CDNF2 and SZ in the total sample 1371 (670 SZ patients and 701 healthy controls) Han Chinese population. Stage 1 included 528 SZ patients and 528 healthy controls; and stage 2 included 142 SZ patients and 173 healthy controls. The allele and genotype frequencies of five single nucleotide polymorphisms (rs2577074, rs2577075, rs2249810, rs6506891, and rs2118343) of CDNF2 were compared between patients and controls.

Results

We found a significant association in allele and genotype frequencies between the two groups at rs2249810 (χ² = 4.38 and 6.45, respectively; P = 0.03 and 0.04, respectively). An association was also observed in males at rs2249810 (χ² = 8.76; P = 0.03). Haplotype TGATC differed between SZ and controls in stage 2 samples (χ² = 6.38; P = 0.01), and rs2118343 genotypes were associated with negative factor scores (F = 4.396; P = 0.01).

Conclusions

These results suggest that rs2249810 and haplotype TGATC of CDNF2 are an SZ susceptibility locus and factor, respectively, and that rs2118343 genotypes are associated with negative symptoms of SZ in the Han Chinese population.

     

Engineering Online and In-Person Social Networks for Physical Activity: A Randomized Trial

Background

Social networks can influence physical activity, but little is known about how best to engineer online and in-person social networks to increase activity.

Purpose

The purpose of this study was to conduct a randomized trial based on the Social Networks for Activity Promotion model to assess the incremental contributions of different procedures for building social networks on objectively measured outcomes.

Methods

Physically inactive adults (n = 308, age, 50.3 (SD = 8.3) years, 38.3 % male, 83.4 % overweight/obese) were randomized to one of three groups. The Promotion group evaluated the effects of weekly emailed tips emphasizing social network interactions for walking (e.g., encouragement, informational support); the Activity group evaluated the incremental effect of adding an evidence-based online fitness walking intervention to the weekly tips; and the Social Networks group evaluated the additional incremental effect of providing access to an online networking site for walking as well as prompting walking/activity across diverse settings. The primary outcome was mean change in accelerometer-measured moderate-to-vigorous physical activity (MVPA), assessed at 3 and 9 months from baseline.

Results

Participants increased their MVPA by 21.0 min/week, 95 % CI [5.9, 36.1], p = .005, at 3 months, and this change was sustained at 9 months, with no between-group differences.

Conclusions

Although the structure of procedures for targeting social networks varied across intervention groups, the functional effect of these procedures on physical activity was similar. Future research should evaluate if more powerful reinforcers improve the effects of social network interventions.

Trial Registration Number

The trial was registered with the ClinicalTrials.gov (NCT01142804).

     

Observed Relationship Behaviors and Sleep in Military Veterans and Their Partners

Background

Emerging research has begun to examine associations between relationship functioning and sleep. However, these studies have largely relied on self-reported evaluations of relationships and/or of sleep, which may be vulnerable to bias.

Purpose

The purpose of the study was to examine associations between relationship functioning and sleep in military couples. This is the first research to examine associations between observed relationship behaviors and subjective and polysomnographically measured sleep in a sample at-risk for both sleep and relationship problems.

Methods

The sample included 35 military veterans and their spouses/partners. Marital functioning was coded from a videotaped conflict interaction. Analyses focused on behavioral codes of hostility and relationship-enhancing attributions. Sleep was assessed via self-report and in-home polysomnography.

Results

Greater hostility was associated with poorer sleep efficiency for oneself (b = ?0.195, p = .013). In contrast, greater relationship-enhancing attributions were associated with higher percentages of stage N3 sleep (b = 0.239, p = .028). Partners’ hostility was also positively associated with higher percentages of stage N3 sleep (b = 0.272, p = .010). Neither hostility nor relationship-enhancing attributions was associated with self-reported sleep quality, percentage of REM sleep, or total sleep time.

Conclusions

Both partners’ positive and negative behaviors during conflict interactions were related to sleep quality. These findings highlight the role that effective communication and conflict resolution skills may play in shaping not only the marital health of veterans and their spouses but also the physical health of both partners as well. Understanding the links between relationship functioning and sleep may be important targets of intervention in the aftermath of war.

     

Positive effects of fampridine on cognition,fatigue and depression in patients with multiple sclerosis over 2 years

Objective

To assess the effects of PR-fampridine on cognitive functioning, fatigue and depression in patients with multiple sclerosis (PwMS).

Methods

Thirty-two PwMS were included in this trial. Cognitive performance was assessed in an open-label and randomized double-blind, placebo-controlled study design using a comprehensive neuropsychological test battery as well as questionnaires examining depression and fatigue.

Results

We found significant improvements in cognitive measures assessing alertness (tonic alertness, p = 0.0244 and phasic alertness, p = 0.0428), psychomotor speed (p = 0.0140) as well as verbal fluency (p = 0.0002) during open-label treatment with PR-fampridine. These effects of performance were paralleled by patients’ perception of reduced fatigue (physical, p = 0.0131; cognitive, p = 0.0225; total, p = 0.0126). Fampridine-induced improvements in phasic alertness (p = 0.0010) and measures of fatigue (physical, p = 0.0014; cognitive, p = 0.0003; total, p = 0.0005) were confirmed during randomized, double-blind, placebo-controlled assessment in the second year. In addition, we found positive effects of PR-fampridine on depressive symptoms (p = 0.0049). We demonstrated persisting beneficial effects of PR-fampridine on fatigue in PwMS over a period of more than 2 years. Drug responsiveness regarding cognitive performance and fatigue was not limited to walking responders.

Conclusions

Our data demonstrate significant positive effects of treatment with PR-fampridine over 2 years on different cognitive domains as well as fatigue and depression in a cohort of PwMS. These findings imply that PR-fampridine should be considered as symptomatic treatment improving aspects of cognition, fatigue and depression in PwMS.

     

Community treatment orders and social outcomes for patients with psychosis: a 48-month follow-up study

Purpose

Community treatment orders (CTOs) are widely used internationally despite a lack of evidence supporting their effectiveness. Most effectiveness studies are relatively short (12-months or less) and focus on clinical symptoms and service data, while a little attention is given to patients’ social outcomes and broader welfare. We tested the association between the duration of CTO intervention and patients’ long-term social outcomes.

Methods

A sub-sample (n = 114) of community-based patients from the Oxford Community Treatment Order Evaluation Trial (OCTET) were interviewed 48 months after randomisation. Multivariate regression models were used to examine the association between the duration of the CTO intervention and social outcomes as measured by the social network schedule, Objective Social Outcomes Index, Euro-Qol EQ-5D-3L (EQ-5D), and Oxford Capabilities Questionnaire for Mental Health.

Results

No significant association was found between the duration of CTO intervention and social network size (IRR = 0.996, p = .63), objective social outcomes (B = ?0.003, p = .77), health-related quality of life (B = 0.001, p = .77), and capabilities (B = 0.046, p = .41). There were no between-group differences in social outcomes when outcomes were stratified by original arm of randomisation. Patients had a mean of 10.2 (SD = 5.9) contacts in their social networks, 42% of whom were relatives.

Conclusions

CTO duration was not associated with improvements in patients’ social outcomes even over the long term. This study adds to growing concerns about CTO effectiveness and the justification for their continued use.

     

Epidermal growth factor receptor overexpression is common and not correlated to gene copy number in ependymoma

Purpose

The aim of this study was to investigate the epidermal growth factor receptor (EGFR) status in ependymoma specimens, as there is a need for new prognostic and druggable targets in this disease.

Methods

Ependymomas (WHO grade II, n = 40; WHO grade III, n = 15) located spinal (n = 35), infratentorial (n = 14), and supratentorial (n = 6) of 53 patients with a median age of 40 (range, 2–79) years were analyzed for Ki-67, p53, and EGFR expression by immunohistochemistry using a tissue microarray and for EGFR gene copy number alterations/mutations. Results were correlated to clinical data.

Results

EGFR overexpression was found in 30/60 % of ependymomas depending on the antibody used and was more pronounced in WHO grade III. High EGFR gene copy number gains were found in 6 (11 %) ependymomas with half of them being amplifications. EGFR amplified ependymomas displayed an EGFR overexpression with both antibodies in two of three cases. A missense mutation in exon 20 of EGFR (S768I) was detected in one amplified case.

Conclusions

EGFR is frequently overexpressed in ependymomas. Other mechanisms than amplification of the EGFR gene appear to contribute to EGFR overexpression in most cases. EGFR mutations may be present in a small subset of ependymomas.

     

<Emphasis Type="Italic">ABCC8</Emphasis> Single Nucleotide Polymorphisms are Associated with Cerebral Edema in Severe TBI

Objective

Cerebral edema (CE) in traumatic brain injury (TBI) is the consequence of multiple underlying mechanisms and is associated with unfavorable outcomes. Genetic variability in these pathways likely explains some of the clinical heterogeneity observed in edema development. A role for sulfonylurea receptor-1 (Sur1) in CE is supported. However, there are no prior studies examining the effect of genetic variability in the Sur1 gene (ABCC8) on the development of CE. We hypothesize that ABCC8 single nucleotide polymorphisms (SNPs) are predictive of CE.

Methods

DNA was extracted from 385 patients. SNPs in ABCC8 were genotyped using the Human Core Exome v1.2 (Illumina). CE measurements included acute CT edema, mean and peak intracranial pressure (ICP), and need for decompressive craniotomy.

Results

Fourteen SNPs with minor allele frequency >0.2 were identified. Four SNPS rs2283261, rs3819521, rs2283258, and rs1799857 were associated with CE measures. In multiple regression models, homozygote-variant genotypes in rs2283261, rs3819521, and rs2283258 had increased odds of CT edema (OR 2.45, p = 0.007; OR 2.95, p = 0.025; OR 3.00, p = 0.013), had higher mean (β = 3.13, p = 0.000; β = 2.95, p = 0.005; β = 3.20, p = 0.008), and peak ICP (β = 8.00, p = 0.001; β = 7.64, p = 0.007; β = 6.89, p = 0.034). The homozygote wild-type genotype of rs1799857 had decreased odds of decompressive craniotomy (OR 0.47, p = 0.004).

Conclusions

This is the first report assessing the impact of ABCC8 genetic variability on CE development in TBI. Minor allele ABCC8 SNP genotypes had increased risk of CE, while major SNP alleles were protective—potentially suggesting an evolutionary advantage. These findings could guide risk stratification, treatment responders, and the development of novel targeted or gene-based therapies against CE in TBI and other neurological disorders.

     

The yield of non-elective inpatient video-EEG monitoring in adults

Background

Inpatient video-EEG monitoring (VEM) can contribute to the diagnosis and treatment in many of the monitored patients. Most admissions to VEM are elective and are scheduled ahead before the monitoring session.

Purpose

To retrospectively evaluate the yield of non-elective VEM sessions.

Methods

We retrospectively reviewed the VEM recordings and medical records of all the patients admitted to our one-bed VEM unit from June 2007 to June 2015. A VEM session was diagnostic when a seizure, an event or previously unreported interictal epileptiform discharges were recorded.

Results

The study group included 304 adults aged 18–92 years (mean 40.4 ± 17.4 years), 181 (59%) women. The diagnostic yield of non-elective and elective VEM session was similar (66 and 69%, respectively). In non-elective VEM, fewer patients had known epilepsy (p = 0.0001), session duration was shorter (p = 0.0001), and seizures and interictal epileptiform discharges were recorded less frequently compared to elective VEM (p = 0.005 and p = 0.0001, respectively).

Conclusion

Non-elective VEM can provide useful information in patients admitted to the neurology department with recent neurological or behavioral events. A timely and correct diagnosis in these patients can potentially reduce unnecessary use of antiepileptic drugs in patients with psychogenic nonepileptic seizures and the morbidity and mortality associated with undiagnosed seizures.

     

Regional Differences in Cerebral Glucose Metabolism After Cardiac Arrest and Resuscitation in Rats Using [<Superscript>18</Superscript>F]FDG Positron Emission Tomography and Autoradiography

Background

Cardiac arrest is an important cause of morbidity and mortality. Brain injury severity and prognosis of cardiac arrest patients are related to the cerebral areas affected. To this aim, we evaluated the variability and the distribution of brain glucose metabolism after cardiac arrest and resuscitation in an adult rat model.

Methods

Ten rats underwent 8-min cardiac arrest, induced with a mixture of potassium and esmolol, and resuscitation, performed with chest compressions and epinephrine. Eight sham animals received anesthesia and experimental procedures identical to the ischemic group except cardiac arrest induction. Brain metabolism was assessed using [¹⁸F]FDG autoradiography and small animal-dedicated positron emission tomography.

Results

The absolute glucose metabolism measured with [¹⁸F]FDG autoradiography 2 h after cardiac arrest and resuscitation was lower in the frontal, parietal, occipital, and temporal cortices of cardiac arrest animals, showing, respectively, a 36% (p = 0.006), 32% (p = 0.016), 36% (p = 0.009), and 32% (p = 0.013) decrease compared to sham group. Striatum, hippocampus, thalamus, brainstem, and cerebellum showed no significant changes. Relative regional metabolism indicated a redistribution of metabolism from cortical area to brainstem and cerebellum.

Conclusions

Our data suggest that cerebral regions have different susceptibility to moderate global ischemia in terms of glucose metabolism. The neocortex showed a higher sensibility to hypoxia–ischemia than other regions. Other subcortical regions, in particular brainstem and cerebellum, showed no significant change compared to non-ischemic rats.

     

Longitudinal predictors of caregiver burden in amyotrophic lateral sclerosis: a population-based cohort of patient–caregiver dyads

Objective

Caregiver burden is a recognised consequence of caring for a patient with neurodegeneration. Amyotrophic lateral sclerosis (ALS) differs from other neurodegenerations by its rapid progression and impairment of motor, cognitive, and behavioural function, which contribute to caregiver burden. However, longitudinal factors that determine the extent of caregiver burden, and in particular the impact of psychological distress among caregivers, have not been fully established.

Methods

Patients with ALS (n = 85) and their primary caregivers (n = 85) completed three serial evaluations. Caregiver burden was measured using the Zarit Burden Interview (ZBI). Anxiety and depression were evaluated using the Hospital Anxiety and Depression Scale (HADS). The Edinburgh Cognitive-Behavioural ALS Screen (ECAS) was used to determine cognitive function in patients. The ALS Functional Rating Scale (ALSFRS-R) measured disease progression.

Results

Using the ZBI, caregivers were categorised as high or low burden. In the low burden group, anxiety scores from the HADS predicted caregiver burden (r = 0.410, F = 3.73, p = 0.033), whereas the depression sub-score from the HADS was predictive of caregiver burden in the high burden group (r = 0.501, F = 5.87, p = 0.006) for cross-sectional analyses. Longitudinally, an elevated score on the HADS at Time 1 was the largest predictor of caregiver burden across serial assessments.

Conclusion

In a patient cohort with relatively preserved cognitive function (65%), anxiety and depression at Time 1, as measured by the HADS, were the best predictors of caregiver burden at Time 3. This observation provides a mechanism by which caregiver burden can be identified by health-care professionals and a stepped care programme of intervention initiated.

     

The BRAIN test: a keyboard-tapping test to assess disability and clinical features of multiple sclerosis

Background

The BRadykinesia Akinesia INcordination (BRAIN) test is an online keyboard-tapping test previously validated as a sensitive tool for detecting signs of Parkinson’s disease.

Objectives

To determine whether the BRAIN test can measure disability in MS and identify the presence of pyramidal or cerebellar dysfunction.

Methods

Kinesia scores (KS, number of key taps in 30 s), akinesia times (AT, mean dwell time on each key) and incoordination scores (IS, variance of travelling time between keys) were calculated in 39 MS patients. These were correlated against the Expanded Disability Status Scale (EDSS) scores, pyramidal and cerebellar functional system scores and 9-hole peg test scores.

Results

EDSS correlated with KS (r = ? 0.594, p < 0.001), AT (r = 0.464, p = 0.003) and IS (r = 0.423, p = 0.007). 9-HPT scores strongly correlated with KS (r = 0.926, p < 0.001). Pyramidal scores correlated with KS (r = ? 0.517, p < 0.001). Cerebellar scores correlated with KS (r = ? 0.665, p < 0.001), AT (r = 0.567, p < 0.001) and IS (r = 0.546, p = 0.007). Receiver operating characteristic curves demonstrate that KS can distinguish between the presence or absence of pyramidal and cerebellar dysfunction with area under curve 0.840 (p < 0.001) and 0.829 (p < 0.001), respectively.

Conclusions

The BRAIN test can remotely measure disability in MS. Specific scores differ according to the presence and severity of pyramidal or extrapyramidal dysfunction. It demonstrates huge potential in monitoring disease progression in clinical trials.