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. 2024 May 14;58(21):9082–9090. doi: 10.1021/acs.est.3c10191

Figure 2.

Figure 2

Association between PM exposure and maternal thyroid function biomarkers during the first trimester. (a) PM1 exposure and the FT4 level; (b) PM1–2.5 exposure and the FT4 level; (c) PM2.5 exposure and the FT4 level; (d) PM1 exposure and the TSH level; (e) PM1–2.5 exposure and the TSH level; and (f) PM2.5 exposure and the TSH level. PM1, particulate matter with an aerodynamic diameter less than or equal to 1 μm; PM1–2.5, particulate matter with an aerodynamic diameter between 1 and 2.5 μm; PM2.5, particulate matter with an aerodynamic diameter less than or equal to 2.5 μm; FT4, free thyroxine; and TSH, thyroid-stimulating hormone.