Autism and attention deficit hyperactivity disorder (ADHD) are often accompanied by sleep problems. Longitudinal studies hint towards a greater proportion of persisting sleep problems across early development in neurodivergent compared to neurotypical individuals. Within the context of a prospective infant sibling study of autism and ADHD (n = 209), we compared early caregiver-rated sleep trajectories of individuals diagnosed with autism, ADHD or cooccurring autism and ADHD (AuDHD) at 36 months…
