Fig. 1: PFAS and OH-PCB concentration versus sample collection year.
From: Associations of PFAS and OH-PCBs with risk of multiple sclerosis onset and disability worsening
A PFHpS, B PFOA, C PFOS, and D 4-OH-CB187 concentration distribution in each sample collection year separated by sex. Plots contain concentration distribution for individuals with MS (filled shape) (n = 907) and HC subjects (empty shape) (n = 907), where males are represented by triangles and females by circles. Imputed concentrations are shown in gray, and measured concentrations in black. The loess regression curve, including 95% confidence bands, has been fitted separately for males (blue solid line) and females (pink dashed line), excluding the imputed concentrations (gray circles and triangles). The upper and lower whiskers indicate 1.5 times the interquartile range from above the upper quartile and below the lower quartile, respectively. Source data are provided as a Source Data file.
