Original Article

Self-Reported Versus Actual Weight and Height Data Contribute to Different Weight Misperception Classifications

Authors: William T. Dalton, PhD, Liang Wang, MD, MPH, Jodi L. Southerland, MA, DrPH, Karen E. Schetzina, MD, MPH, Deborah L. Slawson, PhD, RD

Abstract

Objectives: The purpose of the study was to examine potential differences between two approaches to defining adolescent weight misperception. Specifically, weight status perception was compared with self-reported weight status and actual weight status (based on body mass index percentiles calculated from self-reported and actual weights and heights, respectively). Furthermore, the accuracy of assigning weight status based on body mass index percentiles calculated from self-reported weights and heights was assessed by comparing them with actual weight status.

Methods: Data were extracted from Team Up for Healthy Living, an 8-week, school-based obesity prevention program in southern Appalachia. Participants (N = 1509) were predominately white (93.4%) and ninth graders (89.5%), with approximately equivalent representation of both sexes (50.7% boys).

Results: The study revealed significant differences between the approaches to defining weight misperception (χ2 = 16.2; P = 0.0003).

Conclusions: Researchers should interpret study findings with awareness of potential differences based on the method of calculating weight misperception.

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