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.

Attachment representations in children with disruptive behavior disorders: A special focus on insecurity in middle childhood

According to the emotional and social problems encountered in disruptive behaviour disorder (DBD), there is little available information regarding the attachment processes during middle childhood. Therefore, this study aims to investigate the attachment representations to both caregivers in a sample of 84 children, aged 8–12 years ( N = 42 with a diagnosis of DBD; N = 42 as a comparison group). Attachment is assessed through the Child Attachment Interview, a semi-structured interview that incorporates both narrative and behavioural assessments of attachment, permits the assessment of attachment representations using dimensional and categorical approaches, and allows for the detection of disorganisation to both parents individually. Our results point to the presence of high frequencies of insecure attachment (more than 80%) in the DBD group, with a higher percentage of dismissing attachment, and an over-representation of disorganised attachment (more than 50%). Higher levels of dismissal and lower levels of security are found in DBD than in the comparison group. No attachment differences with respect to both parents are found. Understanding how different aspects of attachment during a specific developmental phase plays a role within the broader emotional functioning of DBD has great potential to lead to innovations in evaluations and treatment processes.

Personal Values and Moral Disengagement Promote Aggressive and Rule-Breaking Behaviours in Adolescents With Disruptive Behaviour Disorders

The pilot study presented in this article investigated the role of moral-cognitive features in understanding aggressive and rule-breaking behaviours in adolescents with Disruptive Behaviour Disorder (DBD). We collected two samples. The community sample was composed of 85 adolescents, whereas the DBD sample was composed of 30 adolescents. Compared with a community sample, adolescents with DBD are more inclined to use moral disengagement (MD) to legitimize their aggressive and rule-breaking behaviours. Moreover, regression models showed that self-enhancement values and MD foster externalizing behaviours taking into account both gender and the group they belonged to, that is, either clinical or community sample. Instead, self-transcendence values could prevent externalizing problems by inhibiting MD. Implications of these findings for assessment and therapeutic interventions are discussed.

Selective drop-out in longitudinal studies and non-biased prediction of behaviour disorders

BackgroundParticipant drop-out occurs in all longitudinal studies, and if systematic, may lead to selection biases and erroneous conclusions being drawn from a study.AimsWe investigated whether drop out in the Avon Longitudinal Study of Parents And Children (ALSPAC) was systematic or random, and if systematic, whether it had an impact on the prediction of disruptive behaviour disorders.MethodTeacher reports of disruptive behaviour among currently participating, previously participating and never participating children aged 8 years in the ALSPAC longitudinal study were collected. Data on family factors were obtained in pregnancy. Simulations were conducted to explain the impact of selective drop-out on the strength of prediction.ResultsDrop out from the ALSPAC cohort was systematic and children who dropped out were more likely to suffer from disruptive behaviour disorder. Systematic participant drop-out according to the family variables, however, did not alter the association between family factors obtained in pregnancy and disruptive behaviour disorder at 8 years of age.ConclusionsCohort studies are prone to selective drop-out and are likely to underestimate the prevalence of psychiatric disorder. This empirical study and the simulations confirm that the validity of regression models is only marginally affected despite range restrictions after selective drop-out.