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Adjusted odds ratios (95% confidence interval [CI]) of low birth weight (LBW), preterm birth (PTB), preterm birth and low birth weight (PT_LBW), and intrauterine growth retardation (IUGR) by two-way interactions of parental education and parental work in Korea from 1995 to 2008
*ORs: Adjusted for infant sex, maternal age, parental age, multiple births, parity, death of previous children, and year of birth.
