Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/28862
Title: The transtheoretical model in weight management: Validation of the Processes of Change Questionnaire
Author: Andrés, Ana
Saldaña García, Carmina
Gómez Benito, Juana
Keywords: Pes corporal
Obesitat
Aspectes psicològics
Body weight
Obesity
Psychological aspects
Issue Date: 25-Nov-2011
Publisher: S. Karger.
Abstract: Objective: The processes of change implied in weight management remain unclear. The present study aimed to identify these processes by validating a questionnaire designed to assess processes of change (the P-Weight) in line with the transtheoretical model. The relationship of processes of change with stages of change and other external variables is also examined. Methods: Participants were 723 people from community and clinical settings in Barcelona. Their mean age was 32.07 (SD = 14.55) years; most of them were women (75.0%), and their mean BMI was 26.47 (SD = 8.52) kg/m2. They all completed the P-Weight and the stages of change questionnaire (SWeight), both applied to weight management, as well as two subscales from the Eating Disorders Inventory-2 and Eating Attitudes Test-40 questionnaires about the concern with dieting. Results: A 34-item version of the PWeight was obtained by means of a refinement process. The principal components analysis applied to half of the sample identified four processes of change. A confirmatory factor analysis was then carried out with the other half of the sample, revealing that the model of four freely correlated first-order factors showed the best fit (GFI = 0.988, AGFI = 0.986, NFI = 0.986, and SRMR = 0.0559). Corrected item-total correlations (0.322-0.865) and Cronbach"s alpha coefficients (0.781-0.960) were adequate. The relationship between the P-Weight and the S-Weight and the concern with dieting measures from other questionnaires supported the validity of the scale. Conclusion: The study identified processes of change involved in weight management and reports the adequate psychometric properties of the P-Weight. It also reveals the relationship between processes and stages of change and other external variables.
Note: Versió postprint del document publicat a: DOI: http://dx.doi.org/10.1159/000335135
It is part of: Obesity Facts, 2011, vol. 4, p. 433-442
Related resource: http://dx.doi.org/10.1159/000335135
URI: http://hdl.handle.net/2445/28862
ISSN: 1662-4025
Appears in Collections:Articles publicats en revistes (Psicologia Social i Psicologia Quantitativa)

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