RecruitingPhase 2Behavioural interventionEfficacy of Cognitive Behavioral Therapy for Insomnia to Treat Insomnia Symptoms in Individuals With Multiple SclerosisThe incidence of insomnia is estimated to be as high as 90% in individuals with MS due to insomnia being underdiagnosed. Sleep disturbances in people with MS have been associated with reduced cognitive performance, physical function, psychological well-being, quality of life, and occupational function, as well as increased prevalence of fatigue, pain, depression, and anxiety. The objective of the proposed study is to determine the efficacy of cognitive behavioral therapy for insomnia (CBT-I) to improve insomnia symptoms (Aim 1) fatigue, and health-related quality of life (Aim 2) in individuals with multiple sclerosis compared to an active control group, and to determine the characteristics of participants that predict improvement in sleep outcomes (Exploratory Aim 3).