Association of prenatal exposure to PM 2.5 and its chemical constituents with early childhood obesity: A population-based study.

Prenatal exposure to PM 2.5 and five major chemical constituents (organic matter (organic matter), black carbon (black carbon), ammonium (NH₄⁺), nitrate (NO₃⁻), sulfate (SO₄²⁻)) was estimated using high-resolution atmospheric reanalysis data.

Quantile g-computation (quantile g-computation) was used to investigate the joint associations of PM 2.5 chemical constituent mixtures and the relative contribution of each constituent with childhood overweight/obesity (OwOb) risk across the first two years of life.