Fig. 6

BSS distribution stratified by copy number of combined haplotype CCAAC in African Americans infants. The scatter plots and the box-and-whisker plots of BSS across 0, 1, and 2 copies of combined haplotype CCAAC for African American infants. P values were obtained from multivariable regression model adjusted for infant age at enrollment, gender, daycare exposure, secondhand smoke exposure, any prior history of breastfeeding, any siblings at home, and enrollment season