Behavioural and psychological pretreatment predictors of short- and long-term weight loss among women with overweight an
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ORIGINAL ARTICLE
Behavioural and psychological pretreatment predictors of short‑ and long‑term weight loss among women with overweight and obesity Rui Jorge1,2,3 · Inês Santos1 · Rita Tomás1 · Marlene N. Silva1,4 · Eliana V. Carraça1,4 · Vitor H. Teixeira5,6 · Pedro J. Teixeira1 Received: 21 June 2019 / Accepted: 31 August 2019 © Springer Nature Switzerland AG 2019
Abstract Purpose This study aims at identifying behavioural and psychological pretreatment predictors of 12- and 36-month weight loss in women with overweight/obesity enrolled in a behavioural weight management intervention. Methods A sample of 221 women participated in a randomized controlled trial on weight management (n 12 month = 184; n36 month = 156). Multiple linear regressions were used to identify pretreatment predictors of successful weight loss, separately for intervention and control groups. Completers-only and baseline observation carried forward analyses were performed. This study is a secondary analysis of data from the ‘Promotion of Exercise and Health in Obesity’ randomized controlled trial. Results Fewer weight loss attempts in the last year positively predicted weight loss at 12 months in the intervention group, explaining 6% of the variance. At 36 months, in the intervention group, 20.2% of the variance in weight change was explained by lower eating disinhibition and higher weight-related quality of life in completers-only analyses, while baseline observation carried forward analyses explained only 9.8% of the variance in weight change via higher self-esteem and lower weight loss expectations. In the control group, higher exercise self-efficacy and a more internal weight locus of control predicted weight loss at 36 months, explaining 13.9% of the variance (completers-only analyses). Conclusions Previous weight loss attempts were identified as the most efficient pretreatment predictor of 12-month weight loss. Eating disinhibition, weight-related quality of life, self-esteem, weight loss expectations, exercise self-efficacy, and weight locus of control seem to be key factors for long-term success. Level of evidence Level I, randomized controlled trial. Clinical trial registration ClinicalTrials.gov identifier NCT00513084. Keywords Weight loss · Overweight · Obesity · Clinical trials · Prediction · Women
Introduction Electronic supplementary material The online version of this article (https://doi.org/10.1007/s40519-019-00775-9) contains supplementary material, which is available to authorized users. * Inês Santos [email protected] 1
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Self‑Regulation in Physical Activity, Nutrition and Obesity Research Group (PANO‑SR), Interdisciplinary Center for the Study of Human Performance (CIPER), Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Cruz Quebrada, 1495‑687 Lisbon, Portugal Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Instituto Universitário Egas Moniz, Almada, Portugal
Overweight and obesity pose a major public health threat, due to their well-documented
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