Effectiveness of Unguided Internet-Based Cognitive Behavioral Therapy and the Three Good Things Exercise for Insomnia: 3-Arm Randomized Controlled Trial

Daisuke Sato   ^{1, 2} , PhD ;   Yoichi Sekizawa   ³ , MA ;   Chihiro Sutoh   ¹ , MD, PhD ;   Yoshiyuki Hirano   ^{4, 5} , PhD ;   Sho Okawa   ⁴ , PhD ;   Motohisa Hirose   ^{1, 4} , PhD ;   Ryo Takemura   ⁶ , PhD ;   Eiji Shimizu   ^{1, 2, 4, 5} , MD, PhD

¹ Department of Cognitive Behavioral Physiology, Graduate School of Medicine, Chiba University, Chiba, Japan

² Cognitive Behavioral Therapy Center, Chiba University Hospital, Chiba, Japan

³ Research Institute of Economy, Trade and Industry, Tokyo, Japan

⁴ Research Center for Child Mental Development, Chiba University, Chiba, Japan

⁵ United Graduate School of Child Development, Osaka University, Kanazawa University, Hamamatsu University School of Medicine, Chiba University and University of Fukui, Suita, Japan

⁶ Department of Preventive Medicine and Public Health, Keio University School of Medicine, Tokyo, Japan