• J J Aardoom, A E Dingemans, J R van Ginkel, P Spinhoven, E F Van Furth, and M E Van den Akker-van Marle.
• Rivierduinen Eating Disorders Ursula, Leiden, The Netherlands.
• Int J Eat Disord. 2016 Dec 1; 49 (12): 1068-1076.

ObjectiveTo investigate the cost-utility of the internet-based intervention "Featback" provided with different levels of therapist support, in comparison to a waiting list.MethodThis economic evaluation was conducted from a societal perspective and was part of a randomized controlled trial in which participants (N = 354) with self-reported ED symptoms were randomized to: (1) 8 weeks of Featback, consisting of psychoeducation and a fully automated monitoring- and feedback system, (2) Featback with low-intensity (weekly) therapist support, (3) Featback with high-intensity (three times a week) therapist support, and (4) a waiting list. Participants were assessed at baseline, postintervention, and 3-month follow-up. Cost-utility acceptability curves were constructed.ResultsNo significant differences between the study conditions were found regarding quality-adjusted life-years (P = 0.55) and societal costs (P = 0.45), although the mean costs per participant were lowest in the Featback condition with low-intensity therapist support (€1951), followed by Featback with high-intensity therapist support (€2032), Featback without therapist support (€2102), and the waiting list (€2582). Featback seemed to be cost-effective as compared to the waiting list. No clear preference was found for Featback with or without therapist support.DiscussionA fully automated Internet-based intervention for ED symptoms with no, low-, or high-intensity therapist support represented good value for money when compared to a waiting list. This finding may have important implications for clinical practice, as both the unguided- and guided intervention could allow for more efficient care and widespread dissemination, potentially increasing the accessibility and availability of mental health care services for individuals with ED symptoms. © 2016 Wiley Periodicals, Inc. (Int J Eat Disord 2016; 49:1068-1076).© 2016 Wiley Periodicals, Inc.

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