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Accuracy of Self-Reported Weight Collected Through a Web-Based Platform in a Weight Loss Trial: Validation Study of the POEmaS Clinical Trial
Alline M. Beleigoli, Andre Q. Andrade, Maria de Fátima H. Diniz, Roberta S. Alvares, Marina H. Ferreira, Leticia A. Silva, Marcia C. Rodrigues, Luma Jacomassi, Amanda G. Cerqueira, Antonio L. Ribeiro
Self-reported anthropometric data in web-based weight loss interventions may be inaccurate. We studied the agreement between online self-reported and measured weight in the course of the POEmaS randomized controlled trial. Measured weight was not different from reported one (-0.4 kg; 95%CI -0.93 to 0.12). 95.6% of the cases were within the limits of agreement (Bland-Altman method). Self-reported weight collected online was accurate, which suggests that interventions and outcomes assessment can rely on these data.