Typically developing siblings of children with autism spectrum disorders are often found to exhibit elevated levels of stress and depressive symptoms compared to siblings of typically developing children or siblings of children with other disabilities. Besides the behavioral problems of the child with autism and certain demographic characteristics that have been recognized as factors associated with typically developing siblings' psychological distress, the role of parental mental health and the social support from the family has not been studied sufficiently. The goal of this study is to assess depressive symptoms in 85 Greek school-aged typically developing siblings of children with autism and to investigate for any associations between siblings' depressive symptoms on one hand and demographics, parental mental health, and perceived social support on the other hand. It was found that typically developing siblings had higher levels of depressive symptoms compared to children from a general population sample. In addition, parental anxiety and social support from the family as perceived by the parents themselves were identified as independently associated with typically developing siblings' depressive symptoms. Of note, perceived social support failed to attenuate the association between parental anxiety and siblings' depressive symptoms. These results highlight the importance of assessing both parental and typically developing siblings' psychological state to implement interventions addressed to the needs of all family members.
Keywords: autism spectrum disorders; depressive symptoms; parental mental health; perceived social support; typically developing siblings.