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BACKGROUND This exploratory proof of principle study examined the extent to which behavior problems represent a functional characteristic that crosses diagnostic boundaries. METHODS This cross-sectional study pertains to 179 caregivers of children, aged 4-13 years (M = 8.27) with cerebral palsy (n = 77), autism spectrum disorder (n = 58), and global developmental delay/intellectual disability (n = 44). Caregivers completed the Strengths and Difficulties Questionnaire, which provides a measure of conduct problems, emotional symptoms, hyperactivity-inattention, peer problems, as well as total difficulties. RESULTS Behavior problem severity differed across diagnostic groups (p < .001). Visual examination of box plots indicated substantial overlap within Strengths and Difficulties Questionnaire subscales across children with autism spectrum disorder, cerebral palsy, and global developmental delay/intellectual disability. Children within each condition demonstrated matching profile topographies, such that hyperactivity-inattention difficulties were most severe. Repeated measures analysis of variances confirmed that children within each group received significantly higher ratings on the hyperactivity-inattention subscale (all p < .001). CONCLUSIONS The approach adopted to examine the data and findings have the potential to inform how we conceptualize and study behavior problems among children with neurodevelopmental conditions. Importantly, children with particular conditions did not demonstrate unique constellations of difficulties. Clinicians must therefore be attuned to the possibility of commonality in behavior problems across children with disparate diagnoses, irrespective of syndrome-specific expectations.

BACKGROUND Behavioural and emotional problems are a salient concern for parents of children with neurodisability, but little is known about the nature of such concerns in this population, nor about the distribution of concern types across ostensibly different subpopulations. METHODS Information about behavioural and emotional concerns was extracted from clinical reports of developmental paediatricians (N = 12) who had assessed children aged 3 to 8 years (N = 129) through three clinics at a major developmental and rehabilitation service centre. All concerns were captured at a granular level. A two-stage, consensus-based interdisciplinary concept-sorting technique was used to identify and group thematically related behavioural and emotional concerns into First Stage Groupings, intended to preserve detail and specificity, and a reduced number of Second Stage Clusters. RESULTS A total of 669 discrete concerns were encountered, aggregated to 58 First Stage Concern Groupings and 28 Second Stage Concern Clusters. Findings of the salience of Groupings related to Attention, Concentration and Distractibility, and Anxiousness, Shyness, and Emotional Sensitivity reflect existing literature for children with neurodevelopmental concerns. "Social Isolation/Peer Engagement," "Tantrums/Outbursts/Meltdowns" and "Volatility/Self-regulation Difficulties," and "Sensory Issues" emerged as areas of significant concern and salience as well. Across clinics, three Clusters recurred among the top five observed for each clinic: "Tantrums/Outbursts/Meltdowns," "Inflexibility/Gets Stuck or Fixated," and "Social Behaviours." CONCLUSIONS This rich descriptive dataset affords insight into the phenomenology of behaviour and emotional concerns in the daily lives of parents whose children have known or suspected neurodisability. Study findings can inform and sensitize clinicians working with this population. Usefulness is enhanced by inclusion of behavioural material that is subthreshold for a formal psychopathologic diagnosis. Certain concern types are encountered commonly across different clinical subpopulations, supporting a noncategorical view of behavioural and emotional problems as functional attributes that cross neurodisability diagnostic categories.

Background There is little information in the research literature of agreement between parent and child in reports of child quality of life (QOL) for a sample of children diagnosed with attention-deficit/hyperactivity disorder (ADHD). The aim of our study was to determine whether parent and child concordance is greater for physical domains of QOL than for psychosocial domains; whether parents rate their child’s QOL better or poorer than their child’s ratings; and whether concordance is related to demographic, socioeconomic or clinical factors. Methods The study was a questionnaire survey of children aged 10–17 referred to the ADHD clinic and diagnosed with ADHD in the province of British Columbia (Canada) between November 2001 and October 2002 and their parent. Results Fifty-eight children diagnosed with ADHD and their parents completed our study questionnaire. The main outcome measure was the Child Health Questionnaire, which permitted comparisons on eight QOL domains and one single item. Intraclass correlation coefficients were moderate for five domains (range from 0.40 to 0.51), and good for three domains (range from 0.60 to 0.75). Children rated their QOL significantly better than their parents in four areas and poorer in one. Standardized Response Means indicated clinically important differences in mean scores for Behaviour and Self-esteem. Compared with population norms, across most domains, children with ADHD reported comparable health. Discrepancies between parent–child ratings were related to the presence of a comorbid oppositional/defiant disorder, a psychosocial stressor and increased ADHD symptoms. Conclusions Although self-report is an important means of eliciting QOL data, in children with ADHD, given the discrepancies in this study between parent and child report, measuring both perspectives seems appropriate.