Sex- and age-related differences in autistic behaviours in children with neurofibromatosis type 1

J Autism Dev Disord. 2023 Jul;53(7):2835-2850. doi: 10.1007/s10803-022-05571-6. Epub 2022 Apr 20.

Abstract

This study investigated sex and age differences in autistic behaviours in children with neurofibromatosis type 1 (NF1) who scored within the clinical range on the Social Responsiveness Scale - Second Edition (T score ≥ 60). Thirty-four males and 28 females (3-16 years) were assessed with the Autism Diagnostic Observation Schedule - Second Edition and Autism Diagnostic Interview - Revised. Across both measures, males exhibited greater social communication deficits relative to females. Age-related abatement of social communication difficulties was observed for males but not females. Conversely, no sex differences were found for restricted/repetitive behaviours, which were stable over time for both males and females. The findings are discussed within the context of broader neurodevelopmental considerations that are common in NF1.

Keywords: Age-related differences; Autism; Autistic; Children; Neurofibromatosis type 1; Sex differences.

MeSH terms

  • Autism Spectrum Disorder*
  • Autistic Disorder* / diagnosis
  • Child
  • Communication
  • Humans
  • Language
  • Male
  • Neurofibromatosis 1* / complications
  • Neurofibromatosis 1* / diagnosis