Using a web-based intervention to promote weight loss maintenance: A randomized controlled trial

Research Project

Project/Area Number	25282203
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Partial Multi-year Fund
Section	一般
Research Field	Applied health science
Research Institution	University of Tsukuba
Principal Investigator	NAKATA Yoshio 筑波大学, 医学医療系, 准教授 (00375461)
Co-Investigator(Kenkyū-buntansha)	橋本幸一筑波大学, 医学医療系, 教授 (80463826) 小林裕幸筑波大学, 医学医療系, 教授 (70536218)
Project Period (FY)	2013-04-01 – 2017-03-31
Project Status	Completed (Fiscal Year 2016)
Budget Amount *help	¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000) Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000) Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000) Fiscal Year 2014: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000) Fiscal Year 2013: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Keywords	肥満 / 減量 / リバウンド / インターネット / 身体活動
Outline of Final Research Achievements	The purpose of this study is to test the effectiveness of a web-based intervention designed to increase physical activity in promoting weight loss maintenance. We conducted a two-phase 27-month randomized controlled trial. In phase 1, a 3-month group-based weight loss program was provided to participants. We randomly assigned (1:1) participants who lost at least 5% weight in phase 1 to the control or intervention groups. Participants in the intervention group regularly report their body weight and physical activity through a web-based system compatible with a weight scale and activity monitor. Study staff provides personalized monthly feedback. The primary outcome is 27-month body weight change. We enrolled 119 eligible participants. In phase 1, 95 participants decreased 5% of the baseline weight and were assigned to the control (n=48) and intervention (n=47) groups. We continued web-based intervention for 24 months and will test the hypothesis in the near future.