Table 2 Exposure characteristics ( n = 240)
From: Placental DNA hypomethylation in association with particulate air pollution in early life
PM 2.5, μg/m 3 | Mean | SD | 25 thpercentile | 75 thpercentile |
|---|---|---|---|---|
Pre-implantation (1-5d) | 16.9 | 11.0 | 10.4 | 19.3 |
Implantation (6-12d) | 16.9 | 9.8 | 10.1 | 20.1 |
Implantation range (6-21d) | 16.7 | 8.1 | 11.3 | 20.4 |
Post-implantation (22-28d) | 17.3 | 10.4 | 10.1 | 20.4 |
Trimester 1 (1-13w) | 16.7 | 5.9 | 12.3 | 20.0 |
Trimester 2 (14-26w) | 17.4 | 6.2 | 12.0 | 22.1 |
Trimester 3 (27w-delivery) | 18.2 | 6.3 | 12.8 | 22.9 |
Whole pregnancy | 17.4 | 3.6 | 15.4 | 19.3 |