What can ADHD without comorbidity teach us about comorbidity?

Intellectual Profiles of Clinic-Referred Preschoolers

Intellectual impairments in preschoolers have been widely studied. A regularity that emerges is that children's intellectual impairments have an important impact on later adjustments in life. However, few studies have looked at the intellectual profiles of young psychiatric outpatients. This study aimed to describe the intelligence profile of preschoolers referred to psychiatry for various cognitive and behavioral problems in terms of verbal, nonverbal, and full-scale IQ and to examine their association with diagnoses. Three hundred four clinical records from young children aged under 7 years and 3 months who consulted at an outpatient psychiatric clinic and who had one intellectual assessment with a Wechsler Preschool and Primary Scale of Intelligence were reviewed. Verbal IQ (VIQ), Nonverbal IQ (NVIQ), and Full-scale IQ (FSIQ) were extracted. Hierarchical cluster analysis using Ward's method was employed to organize data into groups. The children had, on average, a FSIQ of 81, which is significantly lower than that expected in the general population. Four clusters were identified by the hierarchical clusters analysis. Three were characterized by low, average, and high intellectual ability. The last cluster was characterized by a verbal deficit. Findings also revealed that children's diagnoses were not related to any specific cluster, except for children with an intellectual disability with, as expected, low abilities. Children referred to an intellectual assessment in an early childhood mental health clinic showed an altered intellectual development, more specifically in the verbal domain.

Sexual dysfunction in patients with adult attention deficit hyperactivity disorder: A pilot study

Attention deficit hyperactivity disorder (ADHD) symptomatology, comorbid diseases, and pharmacological treatment with antidepressants can have a negative impact on sexual function, which in turn increases the likelihood of sexual dysfunction in people with ADHD. The objective of this pilot study was to differentiate and delineate possible sexual dysfunction in adults with ADHD. Adult ADHD patients (n = 32, cisgender / heterosexual) and healthy controls (n = 32, cisgender / heterosexual) filled out the DÄS-Zuf questionnaire with 59 items (Krieger, 2013). This questionnaire is divided into the scales “general contentment with life,” “anxiety/depression,” “sexual dysfunction” and “sexual satisfaction.” Patients with ADHD had significantly higher scores on single items measuring various aspects of sexual dysfunction as well as higher scores on the “anxiety/depression” scale and lower scores on the “general contentment with life” scale. Following repeated measures analyses of covariance in which the scale “anxiety/depression” was controlled as covariate, none of the previously differences for single items between ADHD patients and controls remained significant. ADHD patients with methylphenidate showed stronger physical sexual arousal compared to those without methylphenidate. The results of this pilot study suggest several explanations for sexual dysfunction among adults with ADHD and offer tentative routes for practical treatment approaches.

Cognitive behavior therapy for externalizing disorders in children and adolescents in routine clinical care: A systematic review and meta-analysis

Various Cognitive Behavioral Therapy (CBT) programs for externalizing disorders in children and adolescents are supported by a substantial body of empirical evidence. Most of the research evidence comes from efficacy studies conducted in university settings, but there is less knowledge about the effect of these treatments in routine clinical care. The purpose of this meta-analysis was to investigate the effectiveness of CBT in non-university settings for Attention Deficit Hyperactivity Disorder (ADHD), Conduct Disorder (CD) and Oppositional Defiant Disorder (ODD). Embase OVID, Ovid MEDLINE and PsycINFO were systematically searched for eligible studies published up to May 2020. In total, 51 treatment effectiveness studies involving 5295 patients were included. The average within-group effect size at post-treatment was significant (g = 0.91), and there were large effect sizes for both ADHD (g = 0.80) and CD/ODD (g = 0.98). At post treatment, remission rates were 38% for ADHD and 48% for CD/ODD, and the overall attrition rate was 14%. Benchmarking against efficacy studies showed that CBT in routine clinical care yields remission rates, within-group effect sizes and attrition rates that are very similar to those found in university settings. The findings support the transportability of CBT for externalizing disorders from university settings to routine clinical care. PROSPERO registration: CRD42020147524.

Cognitive impairment in patients with Neuro-Sjögren

OBJECTIVE

Extraglandular neurological manifestations of Sjögren's syndrome are increasingly recognized, defining the disease entity of Neuro-Sjögren. Neuropsychological assessment of patients with Sjögren's syndrome has hitherto been performed on predominantly rheumatological cohorts. These studies revealed a wide variety of prevalence rates for cognitive impairment (22-80%), while variable cut-off criteria for detection of cognitive impairment were applied. Attentional functions have not yet been thoroughly investigated in these patients, although they clearly represent relevant aspects of cognitive functioning in daily life.

METHODS

We therefore conducted extensive neuropsychological assessment based on two neuropsychological test batteries [i.e., the extended German version of the Consortium to Establish a Registry for Alzheimer's Disease Neuropsychological Assessment Battery (CERAD-PLUS), and the test battery for attentional performance (TAP) as a well-established assessment of attentional functions in the German-speaking part of Europe].

RESULTS

Sixty-four patients with Neuro-Sjögren, who were treated at our university hospital between December 2016 and January 2019, were included. Evidence for the presence of cognitive impairment was found in 55% of patients with Neuro-Sjögren. The degree of cognitive impairment ranged from mild (38%) to severe (17%). Attentional and mnemonic subtests showed pronounced cognitive impairment in patients with Neuro-Sjögren.

INTERPRETATION

Our results suggest that a substantial proportion of patients with Neuro-Sjögren suffer from cognitive impairment, putatively as a corollary of attentional deficits, which might exert adverse effects on occupational abilities, other cognitive functions, and social role functioning.

FACT: a randomised controlled trial to assess the feasibility of QbTest in the assessment process of attention deficit hyperactivity disorder (ADHD) for young people in prison-a feasibility trial protocol

INTRODUCTION

The prevalence of attention deficit hyperactivity disorder (ADHD) within the Children and Young People Secure Estate (CYPSE) is much higher than seen in the general population. To make a diagnosis of ADHD, clinicians draw on information from multiple sources, including parents and teachers. However, obtaining these is particularly difficult for young people in the secure estate. There is increasing evidence in the community that QbTest is able to assist in the accurate and earlier diagnosis of ADHD. The objective of this study is to assess the feasibility and acceptability of QbTest in the assessment of ADHD within the CYPSE.

METHODS AND ANALYSIS

A single-centre parallel group feasibility randomised controlled trial will be conducted. Sixty young people within the CYPSE identified as displaying possible symptoms of ADHD will be randomised to the intervention arm (n=30; QbTest plus usual care) or control arm (n=30; usual care). Primary analyses will be descriptive and a process evaluation will be conducted to assess the contexts involved in implementing the intervention. Interviews will be conducted to explore acceptability and thematic analysis will be used to analyse the data.

ETHICS AND DISSEMINATION

This study was approved by National Health Service Wales research ethics committee 3 (18/WA/0347) on 15 February 2019. The findings will be published in peer-reviewed journals, presented at relevant conferences and disseminated to the public via summaries cocreated with our patient and public involvement group.

TRIAL REGISTRATION NUMBER

ISRCTN17402196.

MATERNIDADE DE CRIANÇAS COM TRANSTORNO DE DÉFICIT DE ATENÇÃO/HIPERATIVIDADE: CONTRIBUIÇÕES PSICANALÍTICAS

Transtorno de déficit de atenção/hiperatividade (TDAH) é um transtorno do neurodesenvolvimento caracterizado por desatenção, hiperatividade e impulsividade. A prevalência aumentou nos últimos tempos e sua origem permanece sob investigação. A suscetibilidade genética em interação com fatores ambientais, principalmente a vida em família, é considerada componente importante da etiologia. Diante disso, este estudo buscou compreender a experiência materna de mulheres com filhos diagnosticados com TDAH. Para tanto, foi desenvolvida uma pesquisa qualitativa empregando o método clínico-qualitativo e as Narrativas Transferenciais como estratégia metodológica. O Teste de Apercepção Temática Infantil, forma Animal - CAT-A foi utilizado como mediador na entrevista. A Psicanálise Winnicottiana foi adotada como referencial teórico para a interpretação dos resultados. As participantes foram quatro mães de crianças diagnosticadas com TDAH. A análise interpretativa mostrou que as mães experimentaram angústias desde a gestação e nascimento das crianças; elas tiveram dificuldades para entrar em sintonia com os filhos no início da vida e não tiveram condições objetivas e emocionais para experimentar a devoção e manifestaram limitações para vincular-se com eles e oferecer-lhes holding. Essas dificuldades no relacionamento inicial eram decorrentes de vivências depressivas latentes ou manifestas das mães, que lhes dificultavam auxiliar os filhos a alcançarem a capacidade para as experiências transicionais, para o brincar e para a simbolização; estes pareciam responder à apatia materna pelo seu gesto criativo por meio de uma motricidade exacerbada e sem objetivos. O artigo alerta para a necessidade de atenção e acompanhamento psicoterapêutico para a mãe e não apenas para a criança com TDAH.

Emotional face recognition in individuals withattention-deficit/hyperactivity disorder: a review article

This review focuses on facial emotion recognition (FER) in individuals with attention- deficit/hyperactivity disorder (ADHD). Behavioral studies of FER in ADHD have resulted in inconsistent findings. Here, we discuss the factors that vary across studies and the way that they influence FER processes in ADHD. Across reviewed studies, fear was the most deficient facial expression to be recognized. Our review suggested that FER deficit in ADHD does not alleviate across development and is partially distinct from ADHD symptoms. In conclusion, assessment of FER in ADHD and targeting that in interventional plans could lead to social skills improvement in ADHD.

Altered structural connectivity is related to attention deficit/hyperactivity subtypes: A DTI study

This study aimed to provide novel insights into the white matter (WM) microstructural properties of Attention Deficit/Hyperactivity Disorder (ADHD) subtypes by recruiting a relatively large sample of stimulant-naïve children and adolescents who had no comorbidity other than Oppositional Defiant Disorder and were homogenous according to the DAT1 gene polymorphism. A sample of 72 ADHD subjects and 24 controls aged 8-15 years were enrolled in the study. We applied tract-based spatial statistics to the DTI measures for obtaining fractional anisotropy (FA) and axial, radial diffusivity (AD, RD) measures to explore ADHD type-related differences in WM for the whole brain. Comparing ADHD-Combined group (ADHD-C) with the ADHD predominantly inattentive group (ADHD-I) we detected increased RD in several bilateral brain area and increased AD mostly in left side of the brain, including the body and splenium of the corpus callosum; the anterior and posteriors limbs of the internal capsule; the superior, anterior and posterior corona radiata; the posterior thalamic radiation; and the superior longitudinal fasciculus. Likewise, mostly in the overlapping brain areas, the ADHD-C group presented increased AD values than ADHD-RI. Significant differences among ADHD types could be a preliminary evidence that they have distinct microstructural properties. There were no significant differences in diffusivity between controls and both the ADHD group as whole or any ADHD subgroups.

Medical Comorbidity of Attention-Deficit/Hyperactivity Disorder in US Adolescents

Understanding patterns of medical comorbidity in attention-deficit/hyperactivity disorder (ADHD) may lead to better treatment of affected individuals as well as aid in etiologic study of disease. This article provides the first systematic evaluation on the medical comorbidity of ADHD in a nationally representative sample (National Comorbidity Replication Survey-Adolescent Supplement; N = 6483) using formal diagnostic criteria. Survey-weighted odds ratios adjusted for demographics, additional medical, and mental disorders were calculated for associations between ADHD and medical conditions. Models adjusted for demographics revealed significantly increased odds of allergy, asthma, enuresis, headache/migraine, and serious stomach or bowel problems. After adjusting for comorbidity, across the medical conditions, enuresis and serious stomach problems were the strongest correlates of ADHD. These findings confirm the pervasive medical comorbidity of ADHD reported in previous clinical and community-based studies. The intriguing salience of enuresis and serious stomach or bowel conditions may also provide an important clue to multisystem involvement in ADHD.

Household task demands for quiet and focused behavior facilitate performance by ADHD youth

ABSTRACT This study evaluated the associations among symptoms of attention-deficit/hyperactivity disorder (ADHD) and of oppositional defiant disorder (ODD) in children and adolescents’ performance in household tasks and assistance provided by caregivers. Parents of children from 6 to 14 years old with ADHD (n = 67) were interviewed with the Children Helping Out: Responsibilities, Expectations, and Supports (CHORES) instrument. Significant correlations were found between symptoms of ODD and assistance in self-care tasks (r = −0.31; p = 0.01); symptoms of hyperactivity correlated with assistance in self-care (r = −0.30, p = 0.01); and family-care (r = −0.25, p = 0.04) tasks. Age was directly associated with the number of tasks performed by children and inversely related to the assistance provided by caregivers. A greater number of ODD symptoms resulted in more household assistance from caregivers. Characteristics of ODD symptoms, such as disobedience and hostility in the face of authority, may limit these children in accessing household tasks by their own initiative, requiring assistance from caregivers.

Autism severity as a predictor of inattention and impulsivity in toddlers

OBJECTIVE

Evaluate how severity of autism spectrum disorder (ASD) symptoms predicts attention-deficit/hyperactivity disorder (ADHD) symptoms in atypically developing toddlers.

METHOD

Parents/caregivers of 2300 atypically developing toddlers' ages 18-37 months were assessed about their children's behaviours using the Baby and Infant Screen for Children with aUtIsm Traits (BISCUIT) Part 1 and the inattention/impulsivity subscale of the BISCUIT-Part 2.

RESULTS

ASD symptom severity was positively and significantly correlated with inattention/impulsivity, indicating that children with more severe symptoms of ASD tended to have higher scores on the measure of inattention/impulsivity, R(2) = 0.49, F (1, 2298) = 2234.72, p < 0.001. Additionally, ASD symptom severity significantly predicted inattention/impulsivity, β = 0.70, t (2298) = 47.27, p < 0.001.

CONCLUSIONS

ASD symptom severity predicts rates of ADHD symptoms in atypically developing toddlers. The implications of these findings are discussed in the context of other research.

Is the prevalence of ADHD in Turkish elementary school children really high?

PURPOSE

Previous findings in Turkish samples of children have suggested higher prevalence of ADHD than those detected in Western cultures. Methodological problems might explain these findings. Here, we aimed to re-check the prevalence rate of Attention-Deficit/Hyperactivity Disorder (ADHD) along with other childhood psychiatric disorders in a representative school sample of elementary school children in İzmir, Turkey.

METHOD

The sample consisted of 419 randomly selected primary school children aged 6-14-year-old. We were able to interview 417 cases (99.5 % of the sample). Psychiatric diagnoses in children were assessed using the K-SADS-PL (Schedule for Affective Disorders and Schizophrenia for School-Age Children- Present and Lifetime Version) and an impairment criterion scale.

RESULTS

The prevalence rates of ADHD were 21.8 and 12.7 % in children without and with impairment, respectively. The following major mental disorders were significantly more prevalent in ADHD cases than controls: oppositional defiant disorder (ODD) (9.4 versus 0 %), conduct disorder (15.1 versus 0 %), anxiety (17 versus 0.5 %), and mood (5.7 versus 0.8 %).

CONCLUSIONS

Our results confirmed a substantially higher ADHD prevalence rate (more than double) than the suggested pooled worldwide prevalence, although similar to the one recently detected in a representative populational sample of children in the US (11 %). These findings, consistent with previous developmental epidemiology studies from Turkey, confirm that ADHD is highly prevalent in Turkish elementary school children.

Reliability and validity of ADHD diagnostic criteria in the Assessment System for Individuals with ADHD (ASIA): a Japanese semi-structured diagnostic interview

BACKGROUND

With reports of a high prevalence of attention-deficit/hyperactivity disorder (ADHD) in adults, publication of ADHD diagnostic criteria in DSM-5, and the urgent need for a relevant diagnostic instrument conforming to DSM-5, we developed the Assessment System for Individuals with ADHD (ASIA), a Japanese semi-structured diagnostic interview. We report here the reliability and validity of ASIA ADHD diagnostic criteria.

METHODS

ASIA ADHD criterion A corresponds to DSM-5 ADHD criterion A and has 144 original questions assessing nine inattention symptoms and nine hyperactivity-impulsivity symptoms, each having four childhood and four adulthood questions. The 144 questions are evaluated on a 3-point frequency scale. ASIA ADHD criteria B to E correspond to DSM-5 ADHD criteria B to E and are evaluated on a 2-point scale. ASIA was administered to 60 adults (mean age, 29.9 ± 9.0 years; 28 males; 36 ADHD and 24 non-ADHD participants diagnosed by consensus of two experts).

RESULTS

For ASIA ADHD criterion A, values of Cronbach's α for the adulthood and childhood inattention and hyperactivity-impulsivity symptoms ranged from 0.64 to 0.90. Values of κ for two independent raters ranged from 0.98 to 1.00 for the 144 questions and raw agreement rates ranged from 0.97 to 1.00 for criteria B, C, D, and E. The consensus DSM-5 diagnoses endorsed 59 of the 60 ASIA diagnoses (ADHD and non-ADHD). The ADHD group scored significantly higher on 125 of the 144 questions for criterion A than the non-ADHD group. Correlations between ASIA total and subscale scores in adulthood and corresponding scores on the Japanese version of the Conners' Adult ADHD Scales-Self Report were high.

CONCLUSIONS

ASIA ADHD criteria showed acceptable psychometric properties, although further investigation is necessary. The use of ASIA ADHD criteria could facilitate clinical practice and research into adult ADHD in Japan.

Neuroanatomical deficits correlate with executive dysfunction in boys with attention deficit hyperactivity disorder

Previous structural imaging studies have revealed gray matter volume abnormalities to reflect the etiology of attention deficit hyperactivity disorder (ADHD), however, which are confounded by age, medication and comorbidity and also ignore the core feature of brain structure in the executive impairments of ADHD. In the present study, we explored gray matter volume abnormalities in male children and adolescents with ADHD who were drug-naive and without comorbidities, and tried to connect structural data and behavioral executive dysfunction to provide more information regarding the brain-behavior relationships in ADHD. Seventy-two male subjects (37 patients and 35 controls) underwent three-dimensional high-resolution structural magnetic resonance imaging and executive function assessments, including the Stroop Color-Word Test and Wisconsin Card Sorting Test (WCST). Voxel-based morphometry with diffeomorphic anatomical registration through exponentiated Lie algebra was used to identify gray matter volume differences between the ADHD and controls. Correlation analyses were performed to identify neuroanatomical deficits that were associated with executive dysfunctions. Significantly reduced gray matter volumes were identified in the right orbitofrontal cortex, right primary motor/premotor cortex, left anterior cingulate cortex and left posterior midcingulate cortex of ADHD patients compared with controls (P<0.05, corrected for family-wise errors). In patients group, the gray matter volumes of the right orbitofrontal cortex and left posterior midcingulate cortex were positively correlated with the completed categories on the WCST, and the gray matter volume of the left posterior midcingulate cortex was negatively correlated with the total and non-perseverative errors on the WCST (P<0.05). The present findings show gray matter volume reductions in motor regions as well as the orbitofrontal and cingulate cortex; this evidence supports theories that suggest frontal abnormalities in children and adolescents with ADHD at early illness stage. The correlations between structural abnormalities and executive dysfunction suggest that neuroanatomical substrate deficits are implicated in the pathophysiology of ADHD.

Attention deficit and attention training in early twentieth-century Japan

Yuzero Motora (1856-1912), regarded as the first professional Japanese psychologist, tried to address students' attention difficulties through attention training methods of his own design. His reports contain the first description of ADHD-like symptoms in the history of Japan. Motora viewed "distractibility" as the irregular transition of attention. Students with low scores and attention difficulties who participated in Motora's exercises showed improvement in arithmetic, psychological testing, and certain aspects of daily life. This article describes Motora's theoretical conception of attention and attention training methodology, the history of attention deficit and attention training, and the significance of Motora's experiments.

Comorbidity of attention deficit hyperactivity disorder with personality disorders in homeless people

Background

Attention deficit hyperactivity disorder (ADHD) is a condition that begins in childhood but can continue into adulthood, and may be the cause of many disadaptive behaviors, as in the case of homeless people, who often display a high incidence of personality disorders. The goal of this study is to analyze the comorbidity of ADHD with axis II disorders in a Spanish homeless population.

Results

The outcomes show high comorbidity between these two kinds of disorders, and that the prevalence of axis II disorders is higher among people with ADHD than among the general population.

Conclusions

From these results we can draw the conclusion that in homeless people ADHD in childhood continues into adulthood, when it is very often observed together with personality disorders. Finally, the implications of this study both for clinical practice and for future lines of research are discussed.

Attention-deficit/hyperactivity disorder without comorbidity is associated with distinct atypical patterns of cerebral microstructural development

Differential core symptoms and treatment responses are associated with the pure versus comorbid forms of attention-deficit/hyperactivity disorder (ADHD). However, comorbidity has largely been unaccounted for in neuroimaging studies of ADHD. We used diffusional kurtosis imaging to investigate gray matter (GM) and white matter (WM) microstructure of children and adolescents with ADHD (n = 22) compared to typically developing controls (TDC, n = 27) and examined whether differing developmental patterns are related to comorbidity. The ADHD group (ADHD-mixed) consisted of subgroups with and without comorbidity (ADHD-comorbid, n = 11; ADHD-pure, n = 11, respectively). Age-related changes and group differences in cerebral microstructure of the ADHD-mixed group and each ADHD subgroup were compared to TDC. Whole-brain voxel-based analyses with mean kurtosis (MK) and mean diffusivity (MD) metrics were conducted to probe GM and WM. Tract-based spatial statistics analyses of WM were performed with MK, MD, fractional anisotropy, and directional (axial, radial) kurtosis and diffusivity metrics. ADHD-pure patients lacked significant age-related changes in GM and WM microstructure that were observed globally in TDC and had significantly greater WM microstructural complexity than TDC in bilateral frontal and parietal lobes, insula, corpus callosum, and right external and internal capsules. Including ADHD patients with diverse comorbidities in analyses masked these findings. A distinct atypical age-related trajectory and aberrant regional differences in brain microstructure were detected in ADHD without comorbidity. Our results suggest that different phenotypic manifestations of ADHD, defined by the presence or absence of comorbidity, differ in cerebral microstructural markers.

Comorbidity and continuity of attention deficit hyperactivity disorder (ADHD) from childhood to adolescence in Turkey

The aim of this study was to examine clinical outcomes, psychiatric comorbidity and neuropsychological characteristics in Turkish adolescents with an attention deficit hyperactivity disorder (ADHD) diagnosis in childhood. A total of 45 children with ADHD diagnosis and 28 children with a psychiatric diagnosis other than ADHD in a 1-year cohort of 7-10-year-olds were reevaluated 6 years later using Schedule for Affective Disorders and Schizophrenia for School-Age Children Present and Lifetime version and Wechsler Intelligence Scale for Children-Revised and Stroop Test TBAG version. This study shows that the clinical outcomes and the comorbidity patterns for ADHD from childhood to adolescence in Turkey are similar to reported rates in the Western countries. In the ADHD group, 75.6 % still has impairing ADHD symptoms and 46.6 % has comorbid psychiatric disorders. The main difference is anxiety disorders being the most common comorbid disorders (37.8 %) in Turkish ADHD youth. These findings stress the high comorbidity associated with ADHD and support the importance of assessment and treatment for ADHD and comorbidities during adolescence.

Outpatient rehabilitation utilization and medical expenses in children aged 0-7 years with ADHD: analyses of population-based national health insurance data

Medical costs of attention-deficit/hyperactivity disorder (ADHD) are substantial and have a large impact on the public health system. The present study presents information regarding outpatient rehabilitation care usage and medical expenditure for children with ADHD. A cross-sectional study was conducted by analyzing data from the Taiwan National Health Insurance claims database for the year 2009. A total of 6643 children aged 0-7 years with ADHD (ICD-9-CM codes 314.0x: attention deficit disorder, 314.00: attention deficit disorder without hyperactivity, or 314.01: attention-deficit disorder with hyperactivity) who had used outpatient rehabilitation care were included in the analyses. Results showed that the mean annual rehabilitation care was 22.24 visits. Among the care users, 76% of patients were male, and 24% were female. More than half of the children with ADHD had comorbid mental illnesses as well. A logistic regression analysis of outpatient rehabilitation expenditure (low vs. high) showed that of those children with ADHD, those aged 0-2 years tended to incur more medical costs than those aged 6-7 years. Other factors such as frequency of rehabilitation visits, hospital medical setting and ownership, location of medical care setting, and types of rehabilitation were also significantly correlated with medical expenditure. The results from this study suggest that health care systems should ensure accurate diagnosis and measurement of impairment to maintain appropriate and successful management of rehabilitation needs for children with ADHD.

[ADHD across the lifespan - an update on research and practice]

ADHD can be regarded as a lifespan disorder. From biopsychosocial vantage point, ADHD leads to age-specific impairments, high psychological distress and is associated with a high occurrence of comorbid disorders. For this review, we summarize actual findings from epidemiological, neuroscientific and clinical studies to present an overview of ADHD-research. We discuss the proposed revisions for DSM-V criteria by comparing them with the present DSM-IV-TR criteria, with a focus on the implications for research and practice. In the second part of this paper, we present new findings from socioeconomic, diagnostic and therapeutic perspectives. There is evidence for a high economic burden that is indirectly caused by ADHD (e.g., production loss, material costs, higher accident rates). Consequently, there is a high demand for comprehensive diagnostic and therapeutic approaches. We present a summary of the latest available diagnostic instruments and therapeutic manuals. The results of research and practice show a growing support for a lifespan perspective on ADHD psychopathology. The burdens resulting from ADHD are evident in all age groups, which has led to establishing age-specific diagnostic and therapeutic materials. Although there is a lack in ADHD-specific healthcare in adulthood, this should be realized by structural changes in healthcare services.

Comorbid externalising behaviour in AD/HD: evidence for a distinct pathological entity in adolescence

While the profiling of subtypes of Attention Deficit Hyperactivity Disorder (AD/HD) have been the subject of considerable scrutiny, both psychometrically and psychophysiologically, little attention has been paid to the effect of diagnoses comorbid with AD/HD on such profiles. This is despite the greater than 80% prevalence of comorbidity under the DSM-IV-TR diagnostic definitions. Here we investigate the event related potential (ERP) and psychometric profiles of Controls, AD/HD, and comorbid AD/HD (particularly AD/HD+ODD/CD) groups on six neurocognitive tasks thought to probe the constructs of selective and sustained attention, response inhibition and executive function. Data from 29 parameters extracted from a child group (age range 6 to 12; 52 Controls and 64 AD/HD) and from an adolescent group (age range 13 to 17; 79 Controls and 88 AD/HD) were reduced via a Principal Components Analysis, the 6 significant eigenvectors then used as determinants of cluster membership via a Two-Step Cluster Analysis. Two clusters were found in the analysis of the adolescent age group - a cluster dominated by Control and AD/HD participants without comorbidity, while the second cluster was dominated by AD/HD participants with externalising comorbidity (largely oppositional defiant/conduct disorder ODD/CD). A similar segregation within the child age group was not found. Further analysis of these objectively determined clusters in terms of their clinical diagnoses indicates a significant effect of ODD/CD comorbidity on a concurrent AD/HD diagnosis. We conclude that comorbid externalising behaviour in AD/HD constitutes a distinct pathological entity in adolescence.