Diagnóstico de sobrepeso em adolescentes: Estudo do desempenho de diferentes critérios para o Índice de Massa Corporal

Translated title of the contribution: Diagnosis of overweight in adolescents aged: Comparative study of different criteria for Body Mass Index

Paulo Orlando Alves Monteiro, Cesar G. Victora, Fernando C. Barros, Elaine Tomasi

Research output: Contribution to journalArticle

Abstract

Objective: In an attempt to simplify the screening process for detecting obesity in adolescence, the performance of different cutoff values for body mass index (BMI) was assessed in a population-based cohort in Southern Brazil. Methods: A total of 493 adolescents aged 15-16 years who lived in the city of Pelotas, Brazil, were studied. Obesity was defined according to the WHO criteria taking into account age and sex (a BMI equal to or greater than the 85 th percentile of the NHANES I reference, plus subscapular and triceps skinfold equal to or greater than the 90 th percentile of the same reference). Different BMI cutoff values were used to assess their specificity and sensitivity. Results: For boys, BMI≥25 kg/m 2 showed the best performance for detecting obesity, with a sensitivity of 90% and only 5% of false positives. The Brazilian proposed criteria that was used had 100% sensitivity but up to 23% of false positives. Higher cutoff values were also tested, but there was a slight increase in specificity, accompanied by a marked reduction in sensitivity. Conclusions: The BMI cutoff of 25 kg/m 2 presented the best performance for screening obesity in the studied sample, and it is recommended for adolescents aged 15 and more in populations with similar characteristics. It provides a single cutoff value to be used in primary health services, eliminating the need for age and sex-specific values and skinfold measurements, and it is also consistent with the cutoff value proposed to identifying overweight adults.

Translated title of the contributionDiagnosis of overweight in adolescents aged: Comparative study of different criteria for Body Mass Index
Original languagePortuguese
Pages (from-to)506-513
Number of pages8
JournalRevista de Saude Publica
Volume34
Issue number5
StatePublished - Oct 2000
Externally publishedYes

Keywords

  • Adolescence#
  • Body Mass Index#
  • Body weight
  • Obesity, diagnosis#
  • Overweight
  • Sensitivity and specificity#
  • Skinfold thickness

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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