Comorbid sleep difficulties negatively affect quality of life and functioning, and have been associated with the causation and maintenance of a range of psychiatric disorders, with increased risk of relapse.[2](https://jcsm.aasm.org/doi/10.5664/jcsm.4452#B2),[8](https://jcsm.aasm.org/doi/10.5664/jcsm.4452#B8) A “cyclical” relationship has been conceptualized, whereby sleep problems exacerbate psychiatric difficulties and vice versa.[2](https://jcsm.aasm.org/doi/10.5664/jcsm.4452#B2) [[The prevalence and management of Poor sleep quality in a secondary care mental health population]] [[Sleep]]