Figure 1
Levels of perfluoroalkyl substances (ng/ml) and organochlorines (ng/g lipids) analyzed in maternal serum in second trimester, stratified by country of residence and SGA status (a: PFOA, b: PCB 153, c: p,p’-DDE, d: HCB, e: PFOS, f: t-NC, g: β-HCH). White boxes: non-SGA mothers, light blue boxes: SGA-mothers. Boxes represent the 25th-75th percentiles, horizontal lines represents the median, whiskers indicate 1.5 times the length of the interquartile range above and below the 75th and 25th percentiles, respectively, and outliers are represented as data points. *P ≤ 0.05, **P ≤ 0.01, and †P ≤ 0.001 for comparisons of levels between countries and between SGAs and non-SGAs within each country. HCB, hexachlorobenzene; PCB, polychlorinated biphenyl; PFOA, perfluorooctanoate; PFOS, perfluoroctane sulfonate; SGA, small for gestational age.
