Multivariate Analysis of Outcomes Among Women Whose Weight Gain was Below that Recommended in the Institute of Medicine Guidelines.

aNS: the number in this category was too small to analyze bsmall for gestational age and clarge for gestational age, defined as the < 10th percentile and > 90th percentile, respectively, of sex-specific reference curves. Based on multiple logistic regression models adjusted for maternal age at birth, smoking, alcohol consumption, maternal height, social status defined by education, length of gestation, and residential area (urban or rural). *Significantly different from the estimate for the reference category (p < 0.05). Multivariate Analysis of Outcomes Among Women Whose Weight Gain was Below that Recommended in the Institute of Medicine Guidelines.