Population characteristics and distribution of potential confounding factors in relation to innate immune responsiveness (stimulated IL-6 response) at age 9 and childhood SES trajectories.

IL-6, interleukin-6; Geo. Mean, geometric mean; SES, socioeconomic status; SGA, small for gestational age.IL-6 production induced by LPS treatment of PBMC.1Anti-inflammatory medications used in the previous 12 months;2Exclusive breastfeeding ≥3 months;3Mother smoked during pregnancy and/or first year after birth;4Log-transofrmed IL-6 values compared by t-test (2-groups) or univariate regression (3+ groups);5reference group for multiple comparisons;6SES distributions compared by chi-squared test;*p