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Prevalence of non-communicable diseases in Brazilian children: follow-up at school age of two Brazilian birth cohorts of the 1990's

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Author(s): Silva Antônio | Barbieri Marco | Cardoso Viviane | Batista Rosângela | Simões Vanda | Vianna Elcio | Gutierrez Manoel | Figueiredo Maria | Silva Nathalia | Pereira Thaís | Rodriguez Juliana | Loureiro Sônia | Ribeiro Valdinar | Bettiol Heloisa

Journal: BMC Public Health
ISSN 1471-2458

Volume: 11;
Issue: 1;
Start page: 486;
Date: 2011;
Original page

ABSTRACT
Abstract Background Few cohort studies have been conducted in low and middle-income countries to investigate non-communicable diseases among school-aged children. This article aims to describe the methodology of two birth cohorts, started in 1994 in Ribeirão Preto (RP), a more developed city, and in 1997/98 in São Luís (SL), a less developed town. Methods Prevalences of some non-communicable diseases during the first follow-up of these cohorts were estimated and compared. Data on singleton live births were obtained at birth (2858 in RP and 2443 in SL). The follow-up at school age was conducted in RP in 2004/05, when the children were 9-11 years old and in SL in 2005/06, when the children were 7-9 years old. Follow-up rates were 68.7% in RP (790 included) and 72.7% in SL (673 participants). The groups of low (
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