Table 3.
Comparison of mean blood levels in ppb of polycyclic aromatic hydrocarbons of cases and controls
| Polycyclic aromatic hydrocarbons | Cases (n = 42) | Control (n = 20) | t-test, P-value | ||
|---|---|---|---|---|---|
| n, % | Mean ± SD (min.–max.) | n, % | Mean ± SD (min.–max.) | ||
| Napthalene | 21 (50.0) | 69.90 ± 105.81 (0–432) | 11 (55.0) | 110.8 ± 244.22 (0–1099) | 0.14, 0.35 |
| Acenapthene | 22 (52.4) | 147.16 ± 246.112 (0–958) | 6 (30.0) | 326.1 ± 861.99 (0–3064) | 1.25, 0.215 |
| Phenanthrene | 29 (69.0) | 63.11 ± 115.621 (0–524.82) | 20 (15.0) | 4.20 ± 10.68 (0–34.15) | 2.26, 0.027 |
| Anthracene | 24 (57.1) | 3.002 ± 5.471 (2–26.53) | 0 (0) | ||
| Fluoranthene | 20 (47.6) | 16.90 ± 27.230 (0–89) | 8 (40.8) | 38.2 ± 82.47 (0–330) | 152, 0.13 |
| Pyrene | 19 (45.2) | 22.56 ± 49.643 (0–278.28) | 5 (25.0) | 41.58 ± 153.32 (0–689.86) | 0.73, 0.47 |
| Benzo(b)fluo. | 7 (16.7) | 2.08 ± 5.791 (0–26) | 0 (0) | ||
| Benzo(k)fluo. | 4 (9.5) | 26.75 ± 104.071 (0–483.20) | 0 (0) | ||
| Benzo(a) pyrene | 4 (9.5) | 0.32 ± 1.137 (0–5) | 2 (10.0) | 0.45 ± 1.40 (0–5) | 0.42, 0.68 |
| Di benz (a,h) | 1 (2.4) | 0.45 ± 2.920 (0–19) | 0 (0) | ||
Ppb, parts per billion.