Daily life impairments associated with self-reported childhood/adolescent attention-deficit/hyperactivity disorder and experiences of diagnosis and treatment: results from the European Lifetime Impairment Survey

Investigating causal relationships between genetically determined increased risk of attention-deficit/hyperactivity disorder (ADHD) and atopic dermatitis (AD): A Mendelian randomization analysis

Atopic dermatitis (AD) is a chronic, inflammatory skin condition with a huge disease burden. Attention-deficit/hyperactivity disorder (ADHD) is often diagnosed in children, and is associated with symptoms of inattention, hyperactivity and impulsive behaviour. Observational studies have demonstrated associations between AD and ADHD. However, to date, there has been no formal assessment of causal relationship between the two. We aim to evaluate causal relationships between genetically increased risk of AD and ADHD using Mendelian randomization (MR) approach. Two-sample bi-directional MR was conducted to elucidate potential causal relationships between genetically increased risk of AD and ADHD, using the largest and most recent genome-wide association study datasets for AD and ADHD-EArly Genetics & Lifecourse Epidemiology AD consortium (21 399 cases and 95 464 controls) and Psychiatric Genomics Consortium (20 183 cases and 35 191 controls). Genetically determined increased risk of AD is not associated with ADHD based on genetic information: odds ratio (OR) of 1.02 (95% CI -0.93 to 1.11; p = 0.705). Similarly, genetic determined increased risk of ADHD is not associated with an increased risk of AD: OR of 0.90 (95% CI -0.76 to 1.07; p = 0.236). Horizontal pleiotropy was not observed from the MR-Egger intercept test (p = 0.328) Current MR analysis showed no causal relationship between genetically increased risk of AD and ADHD in either direction in individuals of European descent. Any observed associations between AD and ADHD in previous population studies could possibly be due to confounding lifestyle factors such as psychosocial stress and sleeping habits.

Association between early-childhood exposure to perfluoroalkyl substances and ADHD symptoms: A prospective cohort study

There is evidence that exposure to perfluoroalkyl substances (PFAS) is associated with attention-deficit/hyperactivity disorder (ADHD) symptoms. Previous studies have focused on prenatal exposure to PFAS, and only few studies have examined the associations of early-childhood exposure, especially at low exposure levels. This study explored the association between early-childhood exposure to PFAS and ADHD symptoms later in childhood. In 521 children, we measured the serum levels of six PFAS in peripheral blood at the ages of 2 and 4 years, including perfluorooctanoate (PFOA), perfluornonanoicacid (PFNA), perfluorodecanoic acid (PFDA), perfluoroundecanoic acid (PFUnDA), perfluorohexane sulfonic acid (PFHxS), and perfluorooctane sulfonate (PFOS). The ADHD Rating Scale IV (ARS) was utilized to measure ADHD traits at 8 years of age. We explored the relationship between PFAS and ARS scores using Poisson regression models after adjusting for potential confounders. Levels of exposure to individual PFAS and the summed value were divided into quartiles to examine possible nonlinear relationships. All six PFAS exhibited inverted U-shaped curves. Children in the 2nd and 3rd quartile levels of each PFAS showed higher ARS scores than those in the1^st quartile level. Below the 3rd quartile of the summed levels of six PFAS (ΣPFAS), a doubling of the ΣPFAS was associated with an 20.0 % (95 % CI: 9.5 %, 31.5 %) increase in ADHD scores. However, at the age of 4 years, none of the evaluated PFAS exhibited linear or nonlinear associations with the ARS scores. Thus, school-aged children may be vulnerable to the neurotoxic effects of exposure to PFAS at age 2 that contribute to ADHD, particularly at low to mid-levels.

Real-World Efficacy and Safety of Extended-Release Methylphenidate (PRC-063) in the Treatment of ADHD in Pediatric and Adult Subjects: Results of a Phase IV Multicenter Comparison With Lisdexamfetamine Dimesylate

OBJECTIVE

To evaluate the real-world efficacy, safety, and functional outcomes of PRC-063 (multilayer-release methylphenidate) versus lisdexamfetamine (LDX) in ADHD subjects in a phase IV, open-label study.

METHOD

The primary endpoint was the change in the ADHD-DSM-5 Rating Scale (ADHD-5-RS) total score from baseline to Month 4. Secondary endpoints included a non-inferiority comparison between PRC-063 and LDX and measures of functioning and evening behavior.

RESULTS

One hundred forty-three pediatric and 112 adult subjects were enrolled. Mean ADHD-5-RS scores (standard deviation) were reduced in pediatric (-16.6 [10.4]) and adult (-14.8 [10.6]) subjects treated with PRC-063 (p < .001). PRC-063 was non-inferior to LDX in the pediatric population but not in the adult population. Significant improvements were demonstrated in quality of life and functionality. Both medications were well-tolerated; more adverse events led to study discontinuation in pediatric subjects treated with LDX versus PRC-063.

CONCLUSION

PRC-063 and LDX significantly improved ADHD symptomatology and functioning and were well-tolerated.

Association between ADHD and vision problems. A systematic review and meta-analysis

AIM

To conduct the first systematic review and meta-analysis assessing whether attention-deficit/hyperactivity disorder (ADHD) is associated with disorders of the eye, and/or altered measures of visual function.

METHOD

Based on a pre-registered protocol (PROSPERO: CRD42021256352), we searched PubMed, Web of Knowledge/Science, Ovid Medline, Embase and APA PsycINFO up to 16th November 2021, with no language/type of document restrictions. We included observational studies reporting at least one measure of vision in people of any age meeting DSM/ICD criteria for ADHD and in people without ADHD; or the prevalence of ADHD in people with and without vision disorders. Study quality was assessed with the Appraisal tool for Cross-Sectional Studies (AXIS). Random effects meta-analyses were used for data synthesis.

RESULTS

We included 42 studies in the narrative synthesis and 35 studies in the meta-analyses (3,250,905 participants). We found meta-analytic evidence of increased risk of astigmatism (OR = 1.79 [CI: 1.50, 2.14]), hyperopia and hypermetropia (OR = 1.79 [CI: 1.66, 1.94]), strabismus (OR = 1.93 [CI: 1.75, 2.12]), unspecified vision problems (OR = 1.94 [CI: 1.38, 2.73]) and reduced near point of convergence (OR = 5.02 [CI: 1.78, 14.11]); increased lag (Hedge's g = 0.63 [CI: 0.30, 0.96]) and variability (Hedge's g = 0.40 [CI: 0.17, 0.64]) of the accommodative response; and increased self-reported vision problems (Hedge's g = 0.63 [CI: 0.44, 0.82]) in people with ADHD compared to those without ADHD (with no significant heterogeneity). We also found meta-analytic evidence of no differences between people with and without ADHD on retinal nerve fiber layer thickness (Hedge's g = -0.19 [CI: -0.41, 0.02]) and refractive error (Hedge's g = 0.08 [CI: -0.26, 0.42]) (with no significant heterogeneity).

DISCUSSION

ADHD is associated with some self-reported and objectively ascertained functional vision problems, but not with structural alterations of the eye. Further studies should clarify the causal relationship, if any, between ADHD and problems of vision.

TRIAL REGISTRATION

PROSPERO registration: CRD42021256352.

The relationship between executive function, processing speed, and attention-deficit hyperactivity disorder in middle childhood

Attention-Deficit Hyperactivity Disorder (ADHD) is a heterogeneous disorder that is highly impairing. Early, accurate diagnosis maximizes long-term positive outcomes for youth with ADHD. Tests of executive functioning (EF) are potential tools for screening and differential diagnosis of ADHD subtypes. However, previous research has been inconsistent regarding the specificity and magnitude of EF deficits across ADHD subtypes. Here, we advance knowledge of the EF-ADHD relationship by using: (1) dimensional latent factor models of ADHD that captures the heterogeneity of expression, and (2) a comprehensive, reliable battery of EF tasks and modeling relationships with a general factor of EF ability. We tested 1548 children and adolescents (ages 7-15 years) from the Texas Twin Project, a population-based cohort with a diverse socioeconomic and ethnic composition. We show that EF deficits were specific to the inattention domain of ADHD. Moreover, we found that the association between EF task performance and inattention was stable across sociodemographic groups. Our results demonstrate that failures of executive control are selectively manifested as covert inattentive symptoms, such as trouble with organization, forgetfulness, and distractedness, rather than overt symptoms, such as inappropriate talkativeness and interruption. Future research, utilizing a bifactor characterization of ADHD in clinical samples, is needed to further refine understanding of the nature of cognitive deficits in ADHD across the full range of symptom variation.

Time of onset and/or diagnosis of ADHD in European children: a systematic review

BACKGROUND

Attention-Deficit/ Hyperactivity Disorder (ADHD) is one of the most common childhood neurobehavioral conditions. Symptoms related to this disorder cause a significant impairment in school tasks and in the activities of children's daily lives; an early diagnosis and appropriate treatment could almost certainly help improve their outcomes. The current study, part of the Models Of Child Health Appraised (MOCHA) project, aims to explore the age at which children experience the onset or diagnosis of ADHD in European countries.

METHODS

A systematic review was done examining the studies reporting the age of onset/diagnosis (AO/AD) of ADHD in European countries (28 European Member States plus 2 European Economic Area countries), published between January 1, 2010 and December 31, 2019. Of the 2276 identified studies, 44 met all the predefined criteria and were included in the review.

RESULTS

The lowest mean AO in the children diagnosed with ADHD alone was 2.25 years and the highest was 7.5 years. It was 15.3 years in the children with ADHD and disruptive behaviour disorder. The mean AD ranges between 6.2 and 18.1 years.

CONCLUSIONS

Our findings indicate that there is a wide variability in both the AO and AD of ADHD, and a too large distance between AO and AD. Since studies in the literature suggest that an early identification of ADHD symptoms may facilitate early referral and treatment, it would be important to understand the underlying reasons behind the wide variability found.

TRIAL REGISTRATION

PROSPERO registration: CRD42017070631 .

Oculomotor deficits in attention deficit hyperactivity disorder (ADHD): A systematic review and comprehensive meta-analysis

Atypical motor coordination and cognitive processes, such as response inhibition and working memory, have been extensively researched in individuals with attention deficit hyperactivity disorder (ADHD). Oculomotor neural circuits overlap extensively with regions involved in motor planning and cognition, therefore studies of oculomotor function may offer unique insights into motor and cognitive control in ADHD. We performed a series of pairwise meta-analyses based on data from 26 oculomotor studies in ADHD to examine whether there were differences in performance on visually-guided saccade, gap, antisaccade, memory-guided, pursuit eye movements and fixation tasks. These analyses revealed oculomotor disturbances in ADHD, particularly for difficulties relating to saccade inhibition, memorizing visual target locations and initiating antisaccades. There was no evidence for pursuit eye movement disturbances or saccade dysmetria. Investigating oculomotor abnormalities in ADHD may provide insight into top-down cognitive control processes and motor control, and may serve as a promising biomarker in ADHD research and clinical practice.

Gestational and peripubertal phthalate exposure in relation to attention performance in childhood and adolescence

The prevalence of Attention Deficit/Hyperactivity Disorder (ADHD) has been increasing. Research suggests that exposure to endocrine disrupting chemicals such as phthalates may play a role, but studies of in utero phthalate exposure and ADHD-related symptoms beyond early childhood are limited. We investigated associations between measures of in utero phthalate exposure and ADHD symptoms, such as inattention and impulsivity, in childhood (age 6-11 years, n = 221) and in adolescence (age 9-18 years, n = 200), as well as cross-sectional relationships between phthalate exposure and ADHD symptoms in adolescence (n = 491) among participants in the Early Life Exposure in Mexico to Environmental Toxicants (ELEMENT) cohort. Women provided urine samples up to three times during pregnancy and adolescents provided a urine sample at 9-18 years of age for phthalate metabolite measurement. We administered the Conners' Continuous Performance Test (CPT) when children were age 6-11 years and again at 9-18 years of age. We used multivariable linear regression to examine associations between the geometric mean of phthalate metabolite levels across pregnancy and CPT scores in childhood or adolescence separately, adjusting for age, years schooling (at 9-18 only), maternal education, and specific gravity. Although average in utero phthalate concentrations were not associated with CPT scores in childhood, interquartile range (IQR) increases of in utero MBzP, MCPP, and MBP were associated with 4.2%, 4.7%, and 4.5% (p < 0.05) higher Omissions scores in adolescence, respectively, indicating higher inattention. In utero MiBP levels were also associated with higher Inter-Stimulus Interval (ISI) and Variability scores (5.4% and 5.5% per IQR, p < 0.05) in adolescence. In addition, urinary DEHP metabolite levels during adolescence were cross-sectionally associated with poorer scores on several CPT indices indicating greater inattention. These findings suggest that in utero phthalate exposure may have adverse effects on attention, but these effects may not appear until adolescence, a period of extensive neurodevelopment. Future research investigating the long-term effects of in utero phthalate exposure on attention and ADHD in adolescence, as well as identification of potential mechanisms involved, is needed.

What Predicts Life Satisfaction in Children and Adolescents with Attention-Deficit/Hyperactivity Disorder (ADHD)? A Study from Parent and Child/Adolescent Perspectives

The aim of this study was to analyze life satisfaction in a sample of 70 children and adolescents (M = 12.21, SD = 2.85) with Attention-Deficit/Hyperactivity Disorder (ADHD), according to parents' and children's/adolescents' reports. In addition, we examined the influence of a series of child/adolescent variables (ADHD presentation, and Conduct Disorder (CD) symptoms, age, gender, and pharmacological support status) on their levels of life satisfaction. Results indicated moderate correlations between children's/adolescents' and parents' perceptions of life satisfaction (r = .40; p < .01), with school being the area with the lowest levels of satisfaction. Also, 44.3% of the sample of parents reported that ADHD drastically interferes negatively in this context. Examining the effects of child/adolescent variables, only the variables age and CD symptoms generated statistically significant differences, showing that as children/adolescents grow up and/or present associate symptoms of CD, perceptions of life satisfaction tend to be more negative. These variables explained 34.5% of the variance of a composite score of life satisfaction, demonstrating a negative effect over the dependent variable. These results might have important implications for diagnosis and intervention in ADHD, as they highlight the relevance of considering life satisfaction as an important aspect to consider in both processes. Further studies must look more deeply into the mechanisms that explain these findings.

Anti-Yo Antibodies in Children With ADHD: First Results About Serum Cytokines

Objective: We investigated whether ADHD children who are positive to Purkinje cell antibodies display pro-inflammatory activity associated with high cytokine serum levels. Method: Fifty-eight ADHD outpatients were compared with 36 healthy, age- and sex-matched children. Forty-five of the ADHD children were positive to anti-Yo antibodies, whereas 34 of the control children were negative. Interleukin 4 (IL-4), IL-6, IL-10, IL-17, tumor necrosis factor alpha (TNFα), and interferon gamma (IFNγ) cytokine serum levels were tested in ADHD children who were positive to anti-Yo antibodies and in the control children who were negative. Results: Anti-Yo antibodies were present to a greater extent in the ADHD group: 77.58% versus 22.42%. Significant differences emerged between the two groups in IL-6 and IL-10, with higher cytokine levels being detected in ADHD children than in controls. Conclusion: Immune processes in ADHD are likely to be associated with mediators of inflammation, such as cytokines. These results contribute to our understanding of action of neural antibodies and cytokines in ADHD.

Health Care Trajectories for Children With ADHD in France: Results From the QUEST Survey

Objective: The objective of this study is to retrospectively describe the pathway toward ADHD diagnosis and treatment, and identify potential areas for improvement. Method: Parent-reported questionnaires were collected by a national sample of ADHD specialists. Results: In total, 473 complete questionnaires were analyzed. Initial onset of ADHD symptoms was reported at a mean age of 4.45 years. Mean age at diagnosis was 8.07 years, and half of the families had seen at least three health care professionals previously. Psychiatrists were most commonly consulted. A "combined" (89% boys) and inattentive (49% boys) profile was identified. Diagnosis was made 1 year later for the latter group. Two thirds of patients received pharmacological treatment. The delay in diagnosis was identified as the main source of concern for caregivers. Conclusion: The 4-year delay in diagnosis may represent a loss of opportunity. Training health care professionals in the core symptoms of ADHD may help reduce disparities and improve patient trajectory.

Perceptions of ADHD Among Diagnosed Children and Their Parents: A Systematic Review Using the Common-Sense Model of Illness Representations

Research on children and parents' experiences of ADHD has grown in recent years, attracting attention to their subjective perception of ADHD as a disorder. Theoretical accounts of illness perception suggest that it is multi-dimensional, consisting of at least five core constructs (see the common-sense model of illness representations or CSM: Leventhal et al., in: Rachman (ed) Medical psychology, Pergamon, New York, vol 2, pp 7-30, 1980, in: Baum, Taylor, Singer (eds) Handbook of psychology and health: social psychological aspects of health, Earlbaum, Hillsdale, vol 4, pp 219-252, 1984). We suggest that the application of CSM in children/adolescents with ADHD and their parents may play an important role in understanding their coping behavior, treatment adherence, and emotional well-being. A systematic search identified 101 eligible studies that investigated the perception of ADHD among diagnosed children/adolescents and their parents. In general, these studies support the existence of the multiple facets of illness representations proposed by the CSM in both diagnosed youngsters and parents indicating substantial variability among both parents and youngsters on each of these facets. The comprehensive assessment of the representations of ADHD indicates imbalance attention to the different representations of ADHD in the literature; disproportional research attention has been paid to the perceived effectiveness of treatment (i.e., treatment control dimension) compared to other illness representations (e.g., timeline, consequence, and coherence), despite research showing their relevance to treatment adherence among other implications. The review identifies the limitation of existing relevant research, needed foci for future studies, specific testable hypotheses, and potential clinical implications of the multifaceted representations of ADHD among youngsters and carers alike.

Risk and protective factors for the development of ADHD symptoms in children and adolescents: Results of the longitudinal BELLA study

BACKGROUND

Attention-deficit/hyperactivity disorder (ADHD) is one of the most common neurodevelopmental disorders in childhood worldwide, and causes significant impairments in overall functioning. In order to develop effective prevention and intervention programs, knowledge of the determinants that have an impact on the onset and development of ADHD symptoms is essential. So far, little is known about factors affecting ADHD symptoms in children and adolescents over time. Therefore, this study investigates potential psychosocial risk and protective factors for ADHD symptoms based on cross-sectional and longitudinal data of a German population-based study.

METHODS

Data on children and adolescents (n = 1,384 aged 11 to 17 years) were collected at three measurement points (baseline, 1-year and 2-year follow-ups) covering a period of two years. We used latent growth modelling to investigate effects of parental mental health problems (risk factor) and self-efficacy, family climate and social support (protective factors) on symptoms of ADHD based on cross-sectional as well as longitudinal data. Sociodemographic factors, pre- and postnatal factors, and comorbid symptoms of internalizing and externalizing mental health problems were considered as covariates.

RESULTS

At baseline, male gender, younger age, stronger aggressive behavior, and stronger parental mental health problems were related to more ADHD symptoms. Longitudinal analyses showed that female gender, migration status, increasing symptoms of generalized anxiety, increasing aggressive behavior and increasing parental mental health problems were associated with stronger increase of ADHD symptoms over time. However, improving family climate was related to decreasing ADHD symptoms over time. We further found moderator effects for social support.

CONCLUSION

The findings of the study provide important information concerning risk and protective factors in the context of ADHD. Hence, the results may be integrated into the planning and implementation of future prevention and early intervention strategies that target affected children and adolescents.

ADHD: science, stigma and service implications

We are delighted to dedicate an edition of the Irish Journal of Psychological Medicine to the topic of attention-deficit hyperactivity disorder (ADHD). ADHD accounts for the majority of clinical presentations to Child and Adolescent Mental Health Services, both in terms of new assessments and ongoing attendances. Papers presented in this edition reflect on the evolving construct of ADHD, drawing from science, clinical practice and public opinion. Current and evidenced-based assessment and treatment practice guidelines are reviewed. International longitudinal studies allow us to understand the personal and societal cost, which can persist for many years post-diagnosis. Despite continuation to adulthood in many young people, follow on adult services are lacking. It is fitting that submissions, by way of personal reflections and opinion pieces, are also included from adult colleagues as they reflect on their experiences in this area. Given the recent development of a national clinical programme in ADHD in Ireland, coupled with a growing evidence for effective interventions, it is hoped that this special edition will highlight the need for appropriate and accessible ADHD treatments across the lifespan.

Does level of attention deficit-hyperactivity disorder symptoms predicts poor transition into adulthood?

OBJECTIVES

Transition into adulthood is a risky period for young people with attention deficit-hyperactivity disorder (ADHD), but empirical studies on this topic are scarce. This study investigated the association between the level of ADHD symptoms and transition into adulthood.

METHODS

Data were collected in the Cohort Study of Substance Use and Risk Factors among a representative sample of young Swiss men (n = 4681) over three waves. Measures included the level of ADHD symptoms and emerging adulthood assessed with the Inventory of the Dimensions of Emerging Adulthood and indicators of successful transition into adulthood.

RESULTS

The level of ADHD symptoms was associated with a lower success in the transition into adulthood. Young people with high level of ADHD symptoms had a reduced increase in indicators of successful transition over time. Inattention symptoms were more strongly associated with emerging adulthood measures in comparison with hyperactive symptoms.

CONCLUSIONS

The level of ADHD symptoms may delay the transition into adulthood, especially inattentive symptoms. Providing tailored interventions to emerging adults with ADHD symptoms may decrease the substantial impairments adults with ADHD experience in life.

Pathway to care and clinical profile of children with attention-deficit hyperactivity disorder in New Delhi, India

BACKGROUND

Attention-deficit hyperactivity disorder (ADHD) is a common childhood neurobehavioral disorder, which may cause impairment in multiple domains. Understanding the pathway to care helps in planning effective early interventions. The study aims to provide a quantitative description of the factors affecting the help-seeking pathway.

MATERIALS AND METHODS

The study was conducted at an outpatients department of a tertiary care multispecialty hospital. Fifty consecutive consenting children aged 5-15 years were screened and diagnosed for ADHD using Conners' Parent Rating Scale-Revised: Short Form, Diagnostic and Statistical Manual of Mental Disorders fourth edition text revision criteria, and Kiddie Schedule for affective disorders and schizophrenia. A semi-structured questionnaire was used to study the pathway of care, using the WHO template. The data were analyzed using appropriate parametric and nonparametric tests in SPSS software.

RESULTS

The average delay from the onset of the illness to first consultation with a qualified health professional was 2.32 ± 1.9 years. Children with an urban background, from a nuclear family, with literate mothers, with a family income of more than Rs. 30,000/month, having hyperactive and combined type of ADHD, and who were referred by school teachers presented significantly earlier. The main source of referrals were school teachers and general medical practitioners. The most common parental beliefs for delay were the views that the "child is naughty" and that "hyperactivity is part of normal growth."

CONCLUSION

Parents' help-seeking behavior is affected by different sociocultural beliefs. Such factors as the lack of recognition and awareness of ADHD, resulting in the delay in seeking treatment should be addressed through health promotion programs.

Factors associated with caregiver burden among pharmacotherapy-treated children/adolescents with ADHD in the Caregiver Perspective on Pediatric ADHD survey in Europe

BACKGROUND

Burden on caregivers of children/adolescents with attention-deficit/hyperactivity disorder (ADHD) is multidimensional, but incompletely understood.

OBJECTIVE

To analyze caregiver burden across the concepts of work, social/family life, and parental worry/stress, in relation to selected contributing factors.

METHODS

The online Caregiver Perspective on Pediatric ADHD survey was fielded in ten European countries. Analysis included children/adolescents (6-17 years) who were receiving/had received ADHD pharmacotherapy in the previous 6 months. Caregivers recorded their child's/adolescent's symptoms "on"/"off" medication (ie, when the caregiver reported that the child/adolescent forgot/chose not to take medication, before the onset of medication effect, or medication worn off). Effects of ADHD severity, comorbidities, and medication adherence on each burden outcome were assessed (multiple regression models).

RESULTS

In total, 2,326 caregivers were included (children/adolescents' mean age: 11.5 years, 80% male). Caregivers reported missed/altered work, avoiding social activity, increased parental worry/stress, and strain on family life, despite using ADHD pharmacotherapy. Child/adolescent comorbidities and ADHD severity were significantly related to all burden concepts measured; the strongest comorbidity associations were with altered work (odds ratios [ORs] =1.68 [95% confidence interval {CI} 1.33, 2.12], 1.87 [1.37, 2.54], 3.47 [2.51, 4.78] for 1, 2, 3+ comorbidities, respectively) and planning the day around the child/adolescent (OR =1.42 [95% CI 1.17, 1.72], 1.73 [1.33, 2.15], 2.65 [1.99, 3.53]); the strongest severity associations were: quitting a job (OR =1.41 [95% CI 1.26, 1.59]) and planning a day around the child/adolescent (OR =1.26 [95% CI 1.20, 1.32]). Increased medication adherence was most associated with reducing the caregiver burden for altered work (OR =0.57 [95% CI 0.45, 0.72]), worrying about how they are being perceived as a parent (OR =0.68 [0.56, 0.83]), and avoiding social activity (OR =0.56 [0.45, 0.68]), but not family or stress burden.

CONCLUSION

Burdens related to work, social activity, family life, and parental worry/stress were experienced by the caregivers of children/adolescents with ADHD, despite using ADHD pharmacotherapy. Better understanding of clinical/treatment characteristics most associated with the components of caregiver burden may help improve ADHD management and may ease caregiver burden.

Serum cytokines in pediatric neuropsychiatric syndromes: focus on Attention Deficit Hyperactivity Disorder

BACKGROUND

Inflammation may represent a common underlying mechanism in a wide range of diseases, including neuropsychiatric disorders. Cytokine involvement has been investigated in some studies on patients with childhood neuropsychiatric diseases. The aim of this study was to determine whether cytokines are involved in ADHD to provide a rationale for immune-based therapeutic strategies in this disorder.

METHODS

Sixty children were studied: 34 consecutive drug-naïve children with ADHD (30 males and 4 females; mean age of 10.10 years, SD=2.43 age) and 26 healthy control children (22 males and 4 females; mean age of 10.70 years, SD=1.81). All cytokines but IL-2 (IL4-IL6-IL10- IL17-TNFA and IFNG) were studied by ELISAs; IL-2 was instead studied by means of paired anti-cytokine Abs and cytokine standards obtained from PharMingen.

RESULTS

Data reveal higher IL-6 and IL-10 levels in ADHD patients than in the control group (P=0.03). No differences emerged between the two groups for the other cytokines.

CONCLUSIONS

Our study showed an imbalance between pro- and anti-inflammatory cytokines that may play a pivotal role in the pathogenesis of ADHD.

Hyperfocusing as a dimension of adult attention deficit hyperactivity disorder

Patients with Attention Deficit Hyperactivity Disorder (ADHD) suffer not only from inability to focus but also from inability to shift attention for events that trigger their interests. This phenomenon is called "hyperfocusing". Previous literature about hyperfocusing is scarce and relies mainly on case reports. The study aimed to investigate and compare the severity of hyperfocusing in adult ADHD with and without psycho-stimulant use. ADHD (DSM-IV-TR) patients either psycho-stimulant naive (n=53) or on psycho-stimulants (n=79) from two ADHD clinics were recruited. The control group (n=65) consisted of healthy university students. A socio-demographic form, the Beck Depression Inventory, the Wender-Utah Rating Scale, the Adult ADHD Self- Report Scale and the Hyperfocusing Scale were applied to the participants. There was no difference between total Hyperfocusing Scale and Adult ADHD Self- Report Scale scores of two patient groups, but both have higher scores than controls (p<0.001). Hyperfocusing is higher in adult ADHD and there was no difference between stimulant-naive patients or patients on stimulants. Hyperfocusing can be defined as a separate dimension of adult ADHD.

The Caregiver Perspective on Paediatric ADHD (CAPPA) survey: Understanding sociodemographic and clinical characteristics, treatment use and impact of ADHD in Europe

BACKGROUND

Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder that affects the lives of patients and their families. The Caregiver Perspective on Paediatric ADHD (CAPPA) survey was conducted to evaluate the burden associated with ADHD in Europe and to identify unmet needs. Here, we describe sociodemographic and clinical characteristics, treatment use and impact of ADHD.

METHODS

The cross-sectional web-based CAPPA survey was fielded in 10 European countries among caregivers of children/adolescents (aged 6-17 years) with ADHD who were currently receiving or had received pharmacotherapy in the previous 6 months.

RESULTS

Data on 3688 completed CAPPA surveys were evaluated. Children/adolescents were diagnosed with ADHD at a mean age of 6.9 years; 80% were male. Most children/adolescents (56%) had undergone behavioural therapy. Overall, 78% of children/adolescents currently received ADHD pharmacotherapy; high rates of atypical antipsychotic use were reported in some countries. Overall, 23% of children/adolescents had repeated a school year and 4% had been expelled recently. Most caregivers (68-88%) reported difficulty with schoolwork, social interactions/activities and family relationships, even when the child/adolescent was receiving ADHD medication. Almost one third (31%) of caregivers felt the need to change employment status despite their child/adolescent receiving ADHD medication in 53% of these cases.

LIMITATIONS

Information was reported by caregivers recruited through market research panels; reporting, recall and selection biases may be present.

CONCLUSION

Variation across Europe was observed in characteristics of caregivers and children/adolescents with ADHD, and treatment use. Even with medication, ADHD compromised or negatively impacted caregivers' work and children/adolescents' schoolwork, their social interactions and family relationships.

Factors related to diagnostic persistence of attention deficit/hyperactivity disorder in Turkish children and adolescents

OBJECTIVE

Attention-deficit/hyperactivity disorder (ADHD) is one of the most frequently occurring mental disorders in children and adolescents. The purpose of this study was to determine diagnostic persistence three years after the first clinical evaluation and to investigate the factors relating to diagnostic persistence in children and adolescents with ADHD.

METHODS

The study included 183 children and adolescents who were evaluated in the first admission. Of 183 children and adolescents, 142 children and adolescents were evaluated in the second admission and only the data of 142 children and adolescents were analysed in the study. Diagnostic persistence was defined as having met the full criteria for ADHD on second evaluation. Symptom severity of ADHD was determined using the Turgay DSM-IV-based Child and Adolescent Behavior Disorders Screening and Rating Scale-Parents Form (T-DSM-IV-S). Intelligence level was assessed through the Wechsler Intelligence Scale for Children-Revised.

RESULTS

Of the children included in the study, 77.5% (n = 110) were determined to have ADHD diagnostic persistence. Low intelligence levels, younger age and higher T-DSM-IV-S inattention and conduct disorder scores were associated with diagnostic persistence. ADHD diagnosis in children and adolescents tends to continue at high rates.

CONCLUSIONS

Determination of the risks related to ADHD diagnostic persistence may contribute to improved treatment planning and interventions.

Impairments, diagnosis and treatments associated with attention-deficit/hyperactivity disorder (ADHD) in UK adults: results from the lifetime impairment survey

AIM

The Lifetime Impairment Survey assessed how ADHD impairs everyday life, identifying areas most affected.

METHODS

This opinion-based survey evaluated experiences, diagnosis and treatment of lifetime impairment in adults with (n=89) and without (n=94) ADHD. Groups were compared using impairment and symptoms scales; higher scores indicate greater impairment.

RESULTS

Mean (standard deviation) age at diagnosis was 18.2 (11.5) years; 47.1% were taking prescription medication for ADHD. Adults with ADHD reported greater impairments than those without for all scales (p<0.001) except the involvement scale.

CONCLUSION

Greater impairments in adults with than without ADHD suggest a continued impact throughout their daily lives.

[Attention-deficit/hyperactivity disorder in childhood/adolescence and impairments associated with daily life: French data from the European Lifetime Impairment Survey]

Attention-deficit/hyperactivity disorder (ADHD) has a 3-5 % prevalence in Europe and North America. It is associated with functional impairment and can have a negative impact on social and family relationships and daily living. The experiences of children/adolescents with ADHD in Europe, as reported by parents/caregivers who completed the online Lifetime Impairment Survey (LIS), were evaluated. The LIS was conducted in France, Germany, Italy, Spain, the Netherlands, and the UK to assess the extent to which the daily lives of children/adolescents (aged<20 years) with ADHD are affected by their disorder as reported by parents/caregivers. Participants to the survey were recruited by email from the GfK Global Online Panel, which consisted of a database of 487,533 members (including 85,512 members in France). The control group comprised parents/caregivers of children/adolescents without ADHD. Treatment for ADHD, as perceived by parents/caregivers of children/adolescents with ADHD, was also reviewed. Data from France are described here. In France, 157 (79 with ADHD, 78 without ADHD) parents/caregivers completed the LIS. Median age at diagnosis was 6.0 years (mean [SD], 6.4 [3.18] years) as reported by parents/caregivers; pharmacological treatment was prescribed for 46.8 % (37/79) of children/adolescents with ADHD. Compared with the control group, ADHD was associated with significantly greater impairment across all domains studied (P<0.001), except problems in home life. General impairment scale data demonstrated that more parents/caregivers of children/adolescents in the ADHD group than the control group thought that experiences during childhood/adolescence and unhappy memories would have a negative impact on their child in adult life (29-32 % vs 9-12 %, respectively). Issues that affected school/education were associated with perceived greater impairment in the ADHD group than the control group. Several limitations should be taken into account when reviewing these data, including the lack of questionnaire validation (although developed by expert consensus). In addition, the survey was conducted online and, as such, was more likely to recruit individuals who were well-educated, computer-literate, and willing to participate in the survey. Survey participants may also have had greater awareness of ADHD and the associated symptoms and impairment, and greater motivation to seek diagnosis or treatment, than the general population. Furthermore, diagnosis of ADHD and history of diagnosis were parent-/caregiver-reported and the results may have been influenced by recall bias or subjective reporting given that the survey did not directly assess the opinions of the children/adolescents with the disorder. These data provide insights into the negative impact that ADHD imposes on all aspects of life for children/adolescents in France with the disorder. Moreover, ADHD is believed to have a negative impact later in the patient's life. Further progress is needed in France and across Europe to provide a more effective and consistent approach to the treatment of patients with ADHD and to meet the expectations regarding management and treatment for the families concerned.