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Related Experiment Videos

Self-reported weight and height: implications for obesity research.

H Nawaz1, W Chan, M Abdulrahman

  • 1Yale-Griffin Prevention Research Center, Derby CT 06418, USA. haqnawaz@pol.net

American Journal of Preventive Medicine
|May 2, 2001
PubMed
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Obese women in weight-loss programs often inaccurately report their weight and height. This self-reported data can affect study eligibility and complicate research recruitment.

Area of Science:

  • Obesity Research
  • Clinical Trial Methodology
  • Biomedical Data Accuracy

Background:

  • Self-reported anthropometric data in epidemiologic studies are prone to under-reporting of weight and over-reporting of height.
  • This reporting bias has not been previously assessed in individuals enrolling in weight-loss programs.
  • Potential adverse effects on study operations due to inaccurate self-reported data are a concern.

Purpose of the Study:

  • To compare self-reported weight, height, and body mass index (BMI) with measured values in overweight or obese women entering a weight-loss program.
  • To investigate the influence of demographic factors and baseline anthropometric measurements on reporting accuracy.
  • To assess the impact of self-reporting discrepancies on study eligibility.

Main Methods:

Related Experiment Videos

  • A comparative analysis of self-reported versus measured weight, height, and BMI was conducted.
  • 97 overweight or obese women (BMI > 27.3) participating in a randomized, controlled weight-loss trial were included.
  • Statistical methods were used to assess differences and identify factors influencing reporting accuracy.

Main Results:

  • Significant differences were observed between measured and self-reported weight (mean difference -3.75 lb) and height (mean difference +0.35 in.).
  • The mean difference for body mass index (BMI) between measured and reported values was -1.14 kg/m(2).
  • Unemployed, retired, or disabled women showed a greater tendency to under-report BMI compared to employed women (p=0.001).
  • Approximately 6% of participants initially meeting BMI criteria based on self-report were later excluded due to measured values.

Conclusions:

  • Obese women seeking weight-loss interventions tend to under-report weight and over-report height, indicating significant inaccuracies in self-reported data.
  • Employment status and disability appear to influence the degree of misreporting.
  • Inaccurate self-reported data can pose challenges in subject recruitment and eligibility determination for research studies.