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This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Maternal age-adjusted rates of low birth weight, preterm birth, preterm birth and low birth weight, and intrauterine growth retardation according to parental education, parental work, and birth characteristics in Korea from 1995 to 2008
*All rates are adjusted for maternal age, with the exception of the maternal age categorical variable.