Effect of a Smartphone App (S-Check) on Actual and Intended Help-Seeking and Motivation to Change Methamphetamine Use Among Adult Consumers of Methamphetamine in Australia: Randomized Waitlist-Controlled Trial

Krista J Siefried   ^{1, 2, 3} , RN, BSc, PhD ;   Florence Bascombe   ^{1, 4, 5, 6} , BSc(Hons), RN, MSc ;   Brendan Clifford   ^{1, 2, 3, 7} , BSc, BN, MPH, PhD ;   Zhixin Liu   ⁸ , PhD ;   Peter Middleton   ^{2, 7} , MA ;   Frances Kay-Lambkin   ⁹ , BSc(Hons), PhD ;   Jack Freestone   ^{10, 11} , MPH ;   Daniel Herman   ¹² , BPsychSci(Hons), MPsych ;   Michael Millard   ¹³ , MBBS ;   Maureen Steele   ² , BA ;   Liam Acheson   ^{1, 2, 3} , BMus(Hons), PhD ;   Carl Moller   ¹ , BCom, BA, BSc(Hons), MPH, MPsych (Clin Neuro), PhD ;   Nicky Bath   ¹⁴ , MSocSci ;   Nadine Ezard   ^{1, 2, 3, 7} , BA, MPH, MBBS, PhD

¹ The National Centre for Clinical Research on Emerging Drugs, University of New South Wales, Randwick, Australia

² St Vincent’s Hospital Alcohol and Drug Service, Sydney, Australia

³ The National Drug and Alcohol Research Centre, The University of New South Wales, Sydney, Australia

⁴ Institute for Global Health, University College London, London, United Kingdom

⁵ Central and North-West London NHS Foundation Trust, London, United Kingdom

⁶ University College London Hospitals NHS Foundation Trust, London, United Kingdom

⁷ New South Wales Drug and Alcohol Clinical Research and Improvement Network, New South Wales Ministry of Health, Sydney, Australia

⁸ Healthdirect Australia, Sydney, Australia

⁹ School of Medicine and Public Health, College of Health, Medicine and Wellbeing, University of Newcastle, Newcastle, Australia

¹⁰ ACON, Sydney, Australia

¹¹ The Kirby Institute, University of New South Wales, Sydney, Australia

¹² The Practice Healthcare, Sydney, Australia

¹³ Clinical Research Unit for Anxiety and Depression, St Vincent's Hospital, Sydney, Australia

¹⁴ LGBTIQ+ Health Australia, Sydney, Australia