The Efficacy of an mHealth App in Facilitating Weight Loss Among Japanese Fitness Center Members: Regression Analysis Study

Akifumi Eguchi   ^{1, 2 *} , PhD ;   Yumi Kawamura   ^{2 *} , PhD ;   Takayuki Kawashima   ^{2, 3 *} , PhD ;   Cyrus Ghaznavi   ^{2, 4} , MD ;   Keiko Ishimura   ⁵ , MPH, PhD ;   Shun Kohsaka   ⁶ , MD ;   Satoru Matsuo   ⁷ , BSc ;   Shinichiro Mizuno   ⁵ , MSc ;   Yuki Sasaki   ⁵ , MPH ;   Arata Takahashi   ² , PhD ;   Yuta Tanoue   ^{2, 8} , PhD ;   Daisuke Yoneoka   ^{9, 10} , PhD ;   Hiroaki Miyata   ^{2, 10} , PhD ;   Shuhei Nomura   ^{2, 10, 11} , PhD

¹ Center for Preventive Medical Sciences, Chiba University, Chiba, Japan

² Department of Health Policy and Management, School of Medicine, Keio University, Tokyo, Japan

³ Department of Mathematical and Computing Science, Tokyo Institute of Technology, Tokyo, Japan

⁴ Department of Medicine, University of California San Francisco, San Francisco, CA, United States

⁵ Link & Communication Inc, Tokyo, Japan

⁶ Department of Cardiology, School of Medicine, Keio University, Tokyo, Japan

⁷ Communication Design Division, RENAISSANCE INC, Tokyo, Japan

⁸ Faculty of Marine Technology, Tokyo University of Marine Science and Technology, Tokyo, Japan

⁹ Center for Surveillance, Immunization, and Epidemiologic Research, National Institute of Infectious Diseases, Tokyo, Japan

¹⁰ Tokyo Foundation for Policy Research, Tokyo, Japan

¹¹ Department of Global Health Policy, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan

*these authors contributed equally