Table 2.
Personal exposure to individual PAH compounds, total PAH, and PM2.5 monitored prenatally (median values with quartile range)
| Variables | Total sample n = 455 | Non-heating (May–September) n = 196 | Heating season (October–April) n = 259 | Heating/non-heating ratio |
|---|---|---|---|---|
| Benzo(a)anthracene (ng/m3) | 1.9 (0.7–6.1) | 0.6 (0.5–0.9) | 5.62 (3.1–10.4) | 9.2 |
| Benzo(b)fluoranthene (ng/m3) | 3.5 (1.4–10.3) | 1.3 (0.9-2.0) | 9.31 (5.0-16.7) | 7.2 |
| Benzo(k)fluoranthene (ng/m3) | 1.1 (0.5–3.2) | 0.43 (0.3–0.7) | 2.86 (1.6–4.9) | 6.7 |
| Benzo(g,h,i)perylene (ng/m3) | 2.0 (0.8–5.4) | 0.72 (0.5–1.1) | 5.07 (2.8–8.5) | 7.0 |
| Benzo(a)pyrene (ng/m3) | 2.2 (0.7–6.8) | 0.64 (0.4–0.9) | 6.27 (3.3–12.2) | 8.7 |
| Chrysene/iso-chrysene (ng/m3) | 2.0 (0.8–5.7) | 0.73 (0.5–1.1) | 5.28 (2.8–8.8) | 7.2 |
| Dibenzo(a, h)anthracene (ng/m3) | 0.4 (0.1–1.2) | 0.09 (0.09–0.2) | 1.10 (0.6–1.9) | 12.2 |
| Indeno(1,2,3-c,d)pyrene (ng/m3) | 2.4 (0.9–6.5) | 0.78 (0.6–1.1) | 6.31 (3.3–10.3) | 8.1 |
| Pyrene (ng/m3) | 4.0 (2.2–10.1) | 2.16 (1.7–2.9) | 8.92 (4.6–14.6) | 4.2 |
| total PAH (ng/m3) | 19.0 (7.8–54.8) | 7.57 (6.0–11.2) | 52.85 (27.2–89.1) | 7.0 |
| PM2.5 (µg/m3) | 34.0 (22.6–49.7) | 27.33 (19.5–37.7) | 43.38 (26.8–58.2) | 1.6 |