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ERICA: prevalences of hypertension and obesity in Brazilian adolescents

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ERICA: prevalences of hypertension and obesity in Brazilian adolescents
Published in
Revista de Saúde Pública, February 2016
DOI 10.1590/s01518-8787.2016050006685
Pubmed ID

Bloch, Katia Vergetti, Klein, Carlos Henrique, Szklo, Moyses, Kuschnir, Maria Cristina C, Abreu, Gabriela de Azevedo, Barufaldi, Laura Augusta, Veiga, Gloria Valeria da, Schaan, Beatriz, Silva, Thiago Luiz Nogueira da, Vasconcellos, Maurício Teixeira Leite de, ,


OBJECTIVE To estimate the prevalence of arterial hypertension and obesity and the population attributable fraction of hypertension that is due to obesity in Brazilian adolescents. METHODS Data from participants in the Brazilian Study of Cardiovascular Risks in Adolescents (ERICA), which was the first national school-based, cross-section study performed in Brazil were evaluated. The sample was divided into 32 geographical strata and clusters from 32 schools and classes, with regional and national representation. Obesity was classified using the body mass index according to age and sex. Arterial hypertension was defined when the average systolic or diastolic blood pressure was greater than or equal to the 95th percentile of the reference curve. Prevalences and 95% confidence intervals (95%CI) of arterial hypertension and obesity, both on a national basis and in the macro-regions of Brazil, were estimated by sex and age group, as were the fractions of hypertension attributable to obesity in the population. RESULTS We evaluated 73,399 students, 55.4% female, with an average age of 14.7 years (SD = 1.6). The prevalence of hypertension was 9.6% (95%CI 9.0-10.3); with the lowest being in the North, 8.4% (95%CI 7.7-9.2) and Northeast regions, 8.4% (95%CI 7.6-9.2), and the highest being in the South, 12.5% (95%CI 11.0-14.2). The prevalence of obesity was 8.4% (95%CI 7.9-8.9), which was lower in the North region and higher in the South region. The prevalences of arterial hypertension and obesity were higher in males. Obese adolescents presented a higher prevalence of hypertension, 28.4% (95%CI 25.5-31.2), than overweight adolescents, 15.4% (95%CI 17.0-13.8), or eutrophic adolescents, 6.3% (95%CI 5.6-7.0). The fraction of hypertension attributable to obesity was 17.8%. CONCLUSIONS ERICA was the first nationally representative Brazilian study providing prevalence estimates of hypertension in adolescents. Regional and sex differences were observed. The study indicates that the control of obesity would lower the prevalence of hypertension among Brazilian adolescents by 1/5.

Mendeley readers

The data shown below were compiled from readership statistics for 358 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 358 100%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 91 25%
Student > Master 58 16%
Student > Doctoral Student 26 7%
Professor 26 7%
Student > Postgraduate 22 6%
Other 46 13%
Unknown 89 25%
Readers by discipline Count As %
Medicine and Dentistry 70 20%
Nursing and Health Professions 69 19%
Sports and Recreations 35 10%
Psychology 13 4%
Agricultural and Biological Sciences 12 3%
Other 46 13%
Unknown 113 32%