A Theory- and Evidence-Based Digital Intervention Tool for Weight Loss Maintenance (NoHoW Toolkit): Systematic Development and Refinement Study

Marta M Marques   ^{1, 2} , PhD ;   Marcela Matos   ^{3 *} , PhD ;   Elina Mattila   ^{4 *} , PhD ;   Jorge Encantado   ¹ , PhD ;   Cristiana Duarte   ⁵ , PhD ;   Pedro J Teixeira   ¹ , PhD ;   R James Stubbs   ⁵ , PhD ;   Falko F Sniehotta   ^{6, 7, 8} , PhD ;   Miikka Ermes   ⁴ , PhD ;   Marja Harjumaa   ⁴ , PhD ;   Juha Leppänen   ⁴ , PhD ;   Pasi Välkkynen   ⁴ , PhD ;   Marlene N Silva   ⁹ , PhD ;   Cláudia Ferreira   ³ , PhD ;   Sérgio Carvalho   ^{3, 10} , PhD ;   Lara Palmeira   ³ , PhD ;   Graham Horgan   ¹¹ , PhD ;   Berit Lilienthal Heitmann   ^{12, 13} , PhD ;   Elizabeth H Evans   ¹⁴ , PhD ;   António L Palmeira   ⁹ , PhD

¹ CIPER -Interdisciplinary Centre for the Study of Human Performance, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal

² Comprehensive Health Research Centre, NOVA Medical School, Universidade Nova de Lisboa, Lisbon, Portugal

³ Center for Research in Neuropsychology and Cognitive and Behavioral Intervention (CINEICC), Faculty of Psychology and Educational Sciences, University of Coimbra, Coimbra, Portugal

⁴ VTT Technical Research Centre of Finland Ltd, Espoo, Finland

⁵ School of Education, Language and Psychology, York St John University, York, United Kingdom

⁶ Population Health Sciences Institute, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne, United Kingdom

⁷ NIHR Policy Research Unit Behavioural Science, Newcastle University, Newcastle Upon Tyne, United Kingdom

⁸ Faculty of Behavioural, Management and Social Sciences, University of Twente, Twente, Netherlands

⁹ Centro de Investigação em Desporto, Educação Física e Saúde, Universidade Lusófona de Humanidades e Tecnologias, Lisbon, Portugal

¹⁰ HEI-Lab: Digital Human-Environment Interaction Lab, School of Psychology and Life Sciences, Lusófona University, Lisbon, Portugal

¹¹ Biomathematics and Statistics Scotland, Aberdeen, United Kingdom

¹² Research Unit for Dietary Studies, The Parker Institute, Bispebjerg and Frederiksberg Hospital, The Capital Region, Denmark

¹³ Department of Public Health, Section for General Practice, University of Copenhagen, Copenhagen, Denmark

¹⁴ Department of Psychology, Durham University, Durham, United Kingdom

*these authors contributed equally