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Area of Science:

  • Nutrition Science
  • Behavioral Science
  • Public Health

Background:

  • Modern food environments promote larger portion sizes, potentially increasing overall food consumption.
  • The practice of 'plate clearing' (finishing entire portions) is hypothesized to contribute to weight gain.
  • Existing research on the link between plate clearing and body mass index (BMI) shows inconsistent results.

Purpose of the Study:

  • To conduct a meta-analysis examining the correlation between plate clearing tendencies and body mass index.
  • To synthesize findings from multiple studies to determine the overall relationship.

Main Methods:

  • A meta-analysis was performed on data from 22 independent samples.
  • Statistical analysis, including meta-regression, was used to assess the pooled effect and identify potential moderators.

Main Results:

  • The overall pooled effect (r = 0.04) indicated no significant relationship between plate clearing and BMI.
  • Meta-regression revealed that the proportion of women in a study sample and the specific self-report measure used moderated the effect.
  • A small positive association may exist for men and when using the Plate Clearing Tendency Scale.

Conclusions:

  • Habitual plate clearing is not generally associated with higher body weight.
  • The lack of a clear association warrants further investigation into contributing factors.
  • Self-report biases may influence findings, but the absence of a robust link is notable.