Reciprocal effects among changes in weight, body image, and other psychological factors during behavioral obesity treatm
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BioMed Central
Open Access
Research
Reciprocal effects among changes in weight, body image, and other psychological factors during behavioral obesity treatment: a mediation analysis António L Palmeira*1,2, David A Markland3, Marlene N Silva1, Teresa L Branco1, Sandra C Martins1, Cláudia S Minderico1, Paulo N Vieira1, José T Barata1, Sidónio O Serpa1, Luis B Sardinha1 and Pedro J Teixeira1 Address: 1Faculty of Human Kinetics, Technical University of Lisbon, Estrada da Costa, 1495-688, Cruz Quebrada, Portugal, 2University Lusófona de Humanidades e Tecnologias, Campo Grande, 1749-028, Lisbon, Portugal and 3School of Sport, Health & Exercise Sciences, Bangor University, George Building, Holyhead Road, Bangor, Gwynedd, UK Email: António L Palmeira* - [email protected]; David A Markland - [email protected]; Marlene N Silva - [email protected]; Teresa L Branco - [email protected]; Sandra C Martins - [email protected]; Cláudia S Minderico - [email protected]; Paulo N Vieira - [email protected]; José T Barata - [email protected]; Sidónio O Serpa - [email protected]; Luis B Sardinha - [email protected]; Pedro J Teixeira - [email protected] * Corresponding author
Published: 9 February 2009 International Journal of Behavioral Nutrition and Physical Activity 2009, 6:9
doi:10.1186/1479-5868-6-9
Received: 13 June 2008 Accepted: 9 February 2009
This article is available from: http://www.ijbnpa.org/content/6/1/9 © 2009 Palmeira et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract Background: Changes in body image and subjective well-being variables (e.g. self-esteem) are often reported as outcomes of obesity treatment. However, they may, in turn, also influence behavioral adherence and success in weight loss. The present study examined associations among obesity treatment-related variables, i.e., change in weight, quality of life, body image, and subjective well-being, exploring their role as both mediators and outcomes, during a behavioral obesity treatment. Methods: Participants (BMI = 31.1 ± 4.1 kg/m2; age = 38.4 ± 6.7 y) were 144 women who attended a 12-month obesity treatment program and a comparison group (n = 49), who received a general health education program. The intervention included regular group meetings promoting lasting behavior changes in physical activity and dietary intake. Body image, quality of life, subjective wellbeing, and body weight were measured at baseline and treatment's end. Mediation was tested by multiple regression and a resampling approach to measure indirect effects. Treatment group assignment was the independent variable while changes in weight and in psychosocial variables were analyzed alternatively as mediators and as dependent variables. Results: At 12 months, the intervention group had
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