Validation of the Brazilian version of the Processes of Change Questionnaire in Weight Management in adults with overweight and obesity in Brazil

Abstract

Abstract Introduction: This study aimed to analyze the psychometric properties of the Brazilian version of the Processes of Change Questionnaire in Weight Management (P-Weight) questionnaire. Methods: A total of 656 adults participated in the study, including people in weight loss treatment and people from the general community. All participants responded to the Process of Change Questionnaire (P-Weight), the Stages of Change Questionnaire (S-Weight), and the Eating Attitudes Test (EAT-26), which assesses risk of eating disorder used as a measure of external validity. Socio-demographic variables were also investigated. Results: The 33-item P-weight questionnaire showed satisfactory psychometric properties with high internal consistency (Cronbachs alpha=0.959). Exploratory and confirmatory factor analyses revealed a 4-factor model similar to the original Spanish version of P-Weight with a slightly rearrangement of the items (KMO=0.92, df (528, n=328) =8,401.015; p<0.0001). We found significant associations between processes and stages of change (p<0.001) and a moderate correlation between the four subscales of P-weight and EAT-26 (p<0.001). Finally, the mean score of P-Weight were higher in clinical sample compared to the general community, suggesting the sensitivity to discriminate cases and controls (p<0.001). Conclusion: This study showed the validity and reliability of the Brazilian version of the P-Weight scale. Therefore, the P-Weight is readily available to help professionals to employ precision interventions to weight loss considering the patients motivational stage in combination with their individual use of the cognitive processes of change.

Competing Interest Statement

The authors have declared no competing interest.

Funding Statement

This study did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors

Author Declarations

I confirm all relevant ethical guidelines have been followed, and any necessary IRB and/or ethics committee approvals have been obtained.

Yes

The details of the IRB/oversight body that provided approval or exemption for the research described are given below:

The study followed the conditions established in Resolution 466/12, of the Brazilian National Health Council and was approved by the Clinical Hospital of Porto Alegre Research Ethics Committee (CAAE: 54352521.8.0000.5327 N. 2021.0447)

I confirm that all necessary patient/participant consent has been obtained and the appropriate institutional forms have been archived, and that any patient/participant/sample identifiers included were not known to anyone (e.g., hospital staff, patients or participants themselves) outside the research group so cannot be used to identify individuals.

Yes

I understand that all clinical trials and any other prospective interventional studies must be registered with an ICMJE-approved registry, such as ClinicalTrials.gov. I confirm that any such study reported in the manuscript has been registered and the trial registration ID is provided (note: if posting a prospective study registered retrospectively, please provide a statement in the trial ID field explaining why the study was not registered in advance).

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I have followed all appropriate research reporting guidelines, such as any relevant EQUATOR Network research reporting checklist(s) and other pertinent material, if applicable.

Yes

Data Availability

All data produced in the present study are available upon reasonable request to the authors

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