Mental health concerns in children with neurodevelopmental conditions attending a developmental assessment service.

Children with neurodevelopmental conditions (NDCs), such as autism and attention-deficit/hyperactivity disorder (ADHD), frequently experience co-occurring mental health concerns. Little research has examined mental health symptoms in children attending developmental assessment services. This study profiled mental health symptoms in children with NDCs attending a hospital-based diagnostic service for their first diagnostic and developmental assessment. Participants were 232 children aged 1.96-17.51 years. Mental health concerns were assessed using the Child Behavior Checklist (CBCL), a caregiver-rated, questionnaire-based assessment of behavioural and emotional difficulties. Subclinical or clinically elevated internalising, externalising and total scores on the CBCL were reported in approximately 48% of preschool and 61% of school-age children. These increased prevalence rates, using the same cutoff scores, remained after excluding items specifically relating to neurodevelopmental concerns (36% preschool; 37% school-age children). More school-aged females reported elevated internalising problems, relative to males (67 % vs 48 %). The number of diagnoses impacted symptoms, with children who received two or more DSM-5 diagnoses showing a greater rate of subclinical or clinically elevated scores, relative to children who received one DSM-5 diagnosis. Our findings demonstrate that children attending developmental assessment services have considerable mental health needs. It is critical that mental health concerns are identified and addressed in children when they first present to developmental assessment services, and that service providers are equipped to provide appropriate resources and pathways to ongoing care.