title: [Evaluation of two classifications for overweight among Brazilian adolescents].
abstract: A cross-sectional study carried out among 418 adolescents between ten and 19 years old at a private school in the city of São Paulo in 1998. The objective of the study was to evaluate the proposed thresholds for diagnosing overweight among Brazilian adolescents. The percentage body fat was measured by dual energy X-ray absorptiometry. The cutoff points used for excess body fat were 25% for boys and 30% for girls. The body mass index was classified in accordance with Cole et al and with Conde & Monteiro. The Brazilian reference (Conde & Monteiro) presented higher sensitivity among younger girls (44.2% vs. 32.6%), older girls (18.9% vs. 17%) and older boys (83.3% vs. 50%). The Conde & Monteiro proposal presented higher positive and negative predictive values and provided higher-sensitivity predictions of excess body fat among the study population.
authors.affiliation: Departamento de Saúde Coletiva, Fundação Faculdade Federal de Ciências Médicas de Porto Alegre, Porto Alegre, RS, Brasil. vitolo@fffcmpa.edu.br
authors.forename: Márcia Regina
authors.initials: MR
authors.lastname: Vitolo
authors.forename: Paula Dal Bó
authors.initials: PD
authors.lastname: Campagnolo
authors.forename: Maria Elisa
authors.initials: ME
authors.lastname: Barros
authors.forename: Cíntia Mendes
authors.initials: CM
authors.lastname: Gama
authors.forename: Fábio
authors.initials: F
authors.lastname: Ancona Lopez
mesh_terms: D015502:Absorptiometry, Photon; D050154:Adiposity; D000293:Adolescent; D000328:Adult; D015992:Body Mass Index; D001938:Brazil; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D050177:Overweight / Q000175:diagnosis*; D011237:Predictive Value of Tests; D012016:Reference Values; D012680:Sensitivity and Specificity