Table 2 Average estimated PM2.5 and constituent exposures, temperature, and relative humidity during the post-conception period in all participants (n = 324)
From: PM2.5 constituent exposures and maternal circulatory homocysteine in early pregnancy
Parameter | Minimum | 10th percentiles | 25th percentiles | Median | 75th percentiles | 90th percentiles | Maximum | IQR | Mean ± SD |
|---|---|---|---|---|---|---|---|---|---|
PM2.5 (µg/m3) | 15.3 | 23.7 | 26.2 | 35.0 | 55.3 | 62.9 | 75.7 | 29.1 | 40.3 ± 15.7 |
BC (µg/m3) | 0.9 | 1.1 | 1.3 | 1.6 | 2.4 | 2.7 | 3.6 | 1.1 | 1.8 ± 0.6 |
OM (µg/m3) | 4.5 | 6.0 | 6.4 | 8.4 | 12.2 | 13.7 | 17.3 | 5.8 | 9.2 ± 3.1 |
NO3– (µg/m3) | 2.5 | 3.4 | 4.1 | 6.4 | 10.9 | 13.5 | 18.0 | 6.7 | 7.6 ± 3.9 |
NH4+ (µg/m3) | 2.0 | 2.6 | 3.0 | 4.2 | 6.6 | 8.4 | 11.4 | 3.6 | 4.8 ± 2.2 |
SO42– (µg/m3) | 3.5 | 4.2 | 4.8 | 5.7 | 7.4 | 8.6 | 12.8 | 2.5 | 6.2 ± 1.8 |
Temperature (℃) | –4.3 | 2.8 | 11.2 | 20.8 | 26.5 | 27.8 | 28.9 | 15.2 | 17.9 ± 9.5 |
Relative humidity (%) | 33.3 | 42.8 | 48.0 | 58.0 | 67.1 | 72.8 | 78.0 | 19.1 | 57.5 ± 11.2 |