The Role of Social Network Technologies in Online Health Promotion: A Narrative Review of Theoretical and Empirical Factors Influencing Intervention Effectiveness

Panos Balatsoukas   ^{1, 2} , PhD ;   Catriona M Kennedy   ^{3, 4} , PhD ;   Iain Buchan   ^{1, 2} , MD,FFPH,FACMI ;   John Powell   ⁵ , PhD,FFPH ;   John Ainsworth   ^{1, 2} , MSc

¹ Institute of Population Health, Centre for Health Informatics, University of Manchester, Manchester, United Kingdom

² Health eResearch Centre, Farr Institute for Health Informatics Research, University of Manchester, Manchester, United Kingdom

³ School of Computer Science, University of Birmingham, Birmingham, United Kingdom

⁴ School of Computer Science, University of Manchester, Manchester, United Kingdom

⁵ Nuffield Department of Primary Care, Medical Sciences Division, University of Oxford, Oxford, United Kingdom