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The Validity of Obesity Based on Self-reported Weight and Height: Implications for Population Studies.

In English

Författare

Summary, in English

Objective: To validate self-reported information on weight and height in an adult population and to find a useful algorithm to assess the prevalence of obesity based on self-reported information. Research Methods and Procedures: This was a crosssectional survey consisting of 1703 participants (860 men and 843 women, 30 to 75 years old) conducted in the community of Vara, Sweden, from 2001 to 2003. Self-reported weight, height, and corresponding BMI were compared with measured data. Obesity was defined as measured BMI >= 30 kg/m(2). Information on education, self-rated health, smoking habits, and physical activity during leisure time was collected by a self-administered questionnaire. Results: Mean differences between measured and self-reported weight were 1.6 kg (95% confidence interval, 1.4; 1.8) in men and 1.8 kg (1.6; 2.0) in women (measured higher), whereas corresponding differences in height were -0.3 cm (-0.5; -0.2) in men and -0.4 cm (-0.5; -0.2) in women (measured lower). Age and body size were important factors for misreporting height, weight, and BMI in both men and women. Obesity (measured) was found in 156 men (19%) and 184 women (25%) and with self-reported data in 114 men (14%) and 153 women (20%). For self-reported data, the sensitivity of obesity was 70% in men and 82% in women, and when adjusted for corrected self-reported data and age, it increased to 81 % and 90%, whereas the specificity decreased from 99% in both sexes to 97% in men and 98% in women. Discussion: The prevalence of obesity based on self-reported BMI can be estimated more accurately when using an algorithm adjusted for variables that are predictive for misreporting.

Publiceringsår

2007

Språk

Engelska

Sidor

197-208

Publikation/Tidskrift/Serie

Obesity

Volym

15

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

Nature Publishing Group

Ämne

  • Nutrition and Dietetics

Nyckelord

  • validity
  • self-reported
  • height
  • weight

Status

Published

Forskningsgrupp

  • Nutrition Epidemiology
  • Social Epidemiology
  • Community Medicine

ISBN/ISSN/Övrigt

  • ISSN: 1930-739X