TAILIEUCHUNG - Báo cáo y học: "The association between weight loss and engagement with a web-based food and exercise diary in a commercial weight loss programme: a retrospective analysis"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: The association between weight loss and engagement with a web-based food and exercise diary in a commercial weight loss programme: a retrospective analysis. | Johnson and Wardle International Journal of Behavioral Nutrition and Physical Activity 2011 8 83 http content 8 1 83 INTERNATIONAL JOURNAL OF BEHAVIORAL NUTRITION AND PHYSICAL ACTIVITY RESEARCH Open Access The association between weight loss and engagement with a web-based food and exercise diary in a commercial weight loss programme a retrospective analysis Fiona Johnson and Jane Wardle Abstract Background The Internet provides a widely accessible platform for weight loss interventions. Automated tools can allow self-guided monitoring of food intake and other target behaviours that are established correlates of weight change. Many programmes also offer social support from the virtual community. The aim of this research was to assess associations between engagement with self-monitoring tools and social support and weight loss in an online weight-control programme. Methods This paper describes a retrospective analysis of weight change among 3621 subscribers to a commercial Internet-based weight loss programme. Participants were all subscribers 2979 women 642 men joining the programme between July 2005 and November 2008 with two or more recorded weights spanning at least 28 days of participation in the programme. Engagement was indexed with frequency of using online diet and exercise diaries and with use of the social support forums. Results Programme engagement was associated with weight loss in both men and women after controlling for initial BMI and duration of participation. The three engagement variables accounted for 13 of variance in percentage weight loss in women p .001 and 19 in men p .001 . In analyses including all the engagement variables exercise diary use was an independent predictor of weight loss among men but non-significant in women. In contrast use of the online forums was associated with weight loss in women but not in men. Among participants who were overweight or obese those in the highest tertile of engagement with food diaries

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