Abstract
Objectives:
to verify the agreement between birth weight information referred by the guardians of the adolescents who participated in the Study of Cardiovascular Risks in Adolescents (Portuguese acronym ERICA) and the birth weight data of the adolescents identified in the National Information System on Live Births (Portuguese acronym Sinasc).
Methods:
probabilistic record linkage of 1,668 records was conducted between the ERICA databases and the Sinasc databases from 1996 to 2002, both from the state of Rio de Janeiro. The agreement between the informed birth weight and the one registered in Sinasc was estimated by the Intraclass Correlation Coefficient (ICC), BlandAltman plot, Cohen's Kappa index, and Gwet's agreement coefficient.
Results:
the ICC was = 0.89; CI95% =0.880.90 and the higher the mother's educational level was, the higher it became. There was also an elevated agreement between the birth weight classification in the low (< 2,500 g), adequate (2,500 to 3,999 g) and elevated (≥ 4,000 g) birth weight categories, Gwet's Agreement Coefficient = 0.91; CI95%= 0.890.92.
Conclusions:
the results showed satisfying agreement between the birth weight referred by the parent/guardian of the adolescents, and the ones registered in SINASC, this agreement being directly proportional to the mother's educational level.
Key words
Birth weight; Adolescent; Epidemiological studies
