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Misclassification of Self-Reported Body Mass Index Categories.

Romy Freigang1, Anne-Kathrin Geier, Gordian Lukas Schmid

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Summary
This summary is machine-generated.

Many individuals misperceive their weight status, with underestimation being common. This inaccurate self-perception of body mass index (BMI) hinders public health efforts to address obesity and overweight concerns.

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Area of Science:

  • Public Health
  • Epidemiology
  • Behavioral Science

Background:

  • Overweight and obesity represent a significant public health challenge in Western societies, including Germany.
  • A key issue is the tendency for individuals to misclassify their own weight status, which impedes health education and behavior change initiatives.
  • This study examines discrepancies between self-reported and objectively measured body mass index (BMI) categories.

Purpose of the Study:

  • To systematically review and analyze global data on the self-perception of weight categories.
  • To identify differences between self-reported BMI and BMI calculated from measured height and weight.
  • To understand the implications of weight misclassification for public health interventions.

Main Methods:

  • Systematic literature search of Medline, EMBASE, and Cochrane Library databases (August 2017).
  • Inclusion of 50 studies from 25 countries, encompassing 173,971 participants.
  • Meta-analysis employed for subgroup analyses.

Main Results:

  • Correct self-categorization of BMI varied widely (16%-83%) across diverse populations.
  • In Europe, women were three times more likely than men to overestimate their BMI category.
  • Underestimation of BMI was more prevalent than overestimation; normal-weight individuals were most accurate in self-assessment. Low socioeconomic status correlated with incorrect BMI perception.

Conclusions:

  • Self-assignment of BMI categories is frequently inaccurate, with a notable tendency towards underestimation.
  • Healthcare providers should proactively inform individuals, particularly overweight persons and men, about their actual BMI category.
  • Addressing misperceptions of weight status is crucial for effective obesity and overweight management strategies.