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Fractional polynomial logistic regression lines with 95% CIs (gray areas) for asssociations of hepcidin, TNF-α, and wood smoke in the model with SFH <10th centile according to CLAP (A) and the associations of hepcidin, TNF-α, and BMI with SFH <3rd centile according to INTERGROWTH (B), compared with respective SFH between the 10th and 90th centiles, adjusted for all covariates in respective models. CLAP, Latin American Center of Perinatology; SFH, symphysis–fundal height.
