The effect of lifestyle and environmental factors on the levels of DNA methylation in the NPSR1 promoter region in children from the BAMSE study (n = 546) using adjusted linear regression models.

*Children not homozygous for major allele of SNP in CpG site 1 (rs2168891) were excluded from CpG site 1 analyses.**Children not homozygous for major allele of SNP in CpG site 2 (rs2168890) were excluded from CpG site 2 analyses. P: p-value for linear regression model adjusted for gender, age at blood sampling and plate used for sodium-bisulfite treatment.†Data analyzed based on the 5th–95th percentile difference in NOx ( µg/m3) exposure levels, additional adjustment made for municipality.††Data analyzed based on highest versus lowest quartile (Q1 versus Q4).