Cost-effectiveness of Internet Interventions Compared With Treatment as Usual for People With Mental Disorders: Systematic Review and Meta-analysis of Randomized Controlled Trials

Pieter J Rohrbach   ^{1, 2} , MSc ;   Alexandra E Dingemans   ¹ , PhD ;   Catharine Evers   ³ , PhD ;   Eric F Van Furth   ^{1, 2} , Prof Dr, PhD ;   Philip Spinhoven   ^{2, 4} , Prof Dr, PhD ;   Jiska J Aardoom   ⁵ , PhD ;   Irene Lähde   ¹ , MSc ;   Fleur C Clemens   ¹ , MSc ;   M Elske Van den Akker-Van Marle   ⁶ , PhD

¹ GGZ Rivierduinen Eating Disorders Ursula, Leiden, Netherlands

² Department of Psychiatry, Leiden University Medical Center, Leiden, Netherlands

³ Department of Social, Health and Organizational Psychology, Utrecht University, Utrecht, Netherlands

⁴ Institute of Psychology, Leiden University, Leiden, Netherlands

⁵ Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, Netherlands

⁶ Section of Medical Decision Making, Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, Netherlands