Table 2.

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) according to parental education, parental work, and birth characteristics in Korea from 1995 to 2008

^*The odds ratios (OR) for parental education, occupation, and work were calculated from each logistic regression model fitted after adjusting for infant sex, maternal age, parental age, multiple births, parity, death of previous children, and year of birth. In addition, the odds ratios for paternal age, maternal age, multiple births, parity (birth order), deaths of previous children, and sex of infant were calculated from each logistic regression model fitted after adjusting for infant sex, maternal age, parental age, multiple births, parity, death of previous children, and year of birth, parental education, occupation, and work.