Effectiveness of internet-based CBT-I for the treatment of chronic subthreshold to moderate insomnia.

Study Objectives: To study the effectiveness of the first internet-based cognitive behavioral therapy for insomnia (CBT-i) in Thailand, using the Nitra application, for chronic subthreshold to moderate insomnia treatment.

Methods: An interventional study without a control group was conducted between January and June 2022. Participants were adults aged 18 years old and older with subthreshold to moderate severity of chronic insomnia (insomnia severity index (ISI) of 8-21) and had mean sleep efficiency <85% from baseline sleep diaries.