Use of the Smoking Cessation App Ex-Smokers iCoach and Associations With Smoking-Related Outcomes Over Time in a Large Sample of European Smokers: Retrospective Observational Study

Marthe BL Mansour   ^{1, 2} , MD ;   Wim B Busschers   ^{1, 2} , PhD ;   Mathilde R Crone   ^{3, 4} , PhD ;   Kristel M van Asselt   ^{1, 2} , MD, PhD ;   Henk C van Weert   ^{1, 2} , MD, PhD ;   Niels H Chavannes   ^{3, 4} , MD, PhD ;   Eline Meijer   ^{3, 4} , PhD

¹ Department of General Practice, Academic Medical Centre Amsterdam, Amsterdam University Medical Centres, Amsterdam, Netherlands

² Amsterdam Public Health Research Institute, Amsterdam, Netherlands

³ Department of Public Health & Primary Care, Leiden University Medical Centre, Leiden, Netherlands

⁴ National eHealth Living Lab, Leiden University Medical Center, Leiden, Netherlands