Insomnia, depression, and anxiety symptoms interact and individually impact functioning: A network and relative importance analysis in the context of insomnia

•Network analysis of insomnia, depression, and anxiety symptom interaction in the context of individuals with insomnia.•Trouble relaxing was central in the network.•Low energy and depressive affect symptoms were key predictors across domains of functional impairment.•Findings could inform the development of clinical screening practices and targets for transdiagnostic intervention.