This paper is in the following e-collection/theme issue:

Formative Evaluation of Digital Health Interventions (1848) Engagement with and Adherence to Digital Health Interventions, Law of Attrition (402) mHealth for Wellness, Behavior Change and Prevention (2523) Users' and Patients' Needs for Mental Health Services (338) Innovations and Technology for Physical Activity Education (613) Usability of Apps and User Perceptions of mHealth (791) Mental Health Issues in Adolescence (335) Parent and Child Education on Physical Activity (119)

Published on in Vol 5, No 2 (2021): February

Preprints (earlier versions) of this paper are available at https://preprints.jmir.org/preprint/21432, first published .
Usage and Weekly Attrition in a Smartphone-Based Health Behavior Intervention for Adolescents: Pilot Randomized Controlled Trial

Usage and Weekly Attrition in a Smartphone-Based Health Behavior Intervention for Adolescents: Pilot Randomized Controlled Trial

Usage and Weekly Attrition in a Smartphone-Based Health Behavior Intervention for Adolescents: Pilot Randomized Controlled Trial

Authors of this article:

Erlendur Egilsson 1 Author Orcid Image ;   Ragnar Bjarnason 2, 3 Author Orcid Image ;   Urdur Njardvik 1 Author Orcid Image
Article Authors Cited by (11) Tweetations (1) Metrics

Erlendur Egilsson   1 * ;   Ragnar Bjarnason   2, 3 * , MD, DrMed ;   Urdur Njardvik   1 * , MA, PhD

1 Department of Psychology, University of Iceland, Reykjavik, Iceland

2 Faculty of Medicine, University of Iceland, Reykjavik, Iceland

3 Children's Hospital, Landspitali University Hospital, Reykjavik, Iceland

*all authors contributed equally

Corresponding Author:

  • Erlendur Egilsson
  • Department of Psychology
  • University of Iceland
  • Sturlugata 1
  • Reykjavik, 101
  • Iceland
  • Phone: 354 6184805
  • Fax: 354 552 1331
  • Email: erlendu@hi.is