borderline significancep = 0.06
Association of cord blood MT-ND4L 10550A>G heteroplasmy with prenatal PM 2.5 exposure and childhood overweight Using the average trimester-specific residential PM 2.5 exposures, we observed that a 5 μg/m 3 increment in PM 2.5 was associated with the cord blood MT-ND4L 10550A>G heteroplasmy (OR = 0.52; 95% CI: 0.26 to 1.03) in the first trimester with borderline significance ( p = 0.06) (Supplementary Table S 4 ).