Median (range) of cytogenetic markers stratified for potential risk factors: harbour workers and controls
| Median (range) | n | Micronuclei frequency | SCE rate |
|---|---|---|---|
| *pMann-Whitney U test < 0.05; **pMann-Whitney U test < 0.01; ***pMann-Whitney U test < 0.001. | |||
| Harbour workers | |||
| Work on suction dredgers | |||
| No | 58 | 5.9 (2.2–19.0) | 10.7 (7.6–15.6) |
| Yes | 24 | 5.7 (2.5–14.9) | 10.0 (6.6–13.7) |
| Duration of employment | |||
| <median (14 years) | 35 | 5.8 (2.2–12.7) | 10.1 (7.1–14.0) |
| ⩾median (14 years) | 46 | 5.7 (2.5–19.0) | 10.9 (6.6–15.6) |
| Harbour workers and controls | |||
| Controls | 83 | 7.1 (2.7–13.4) | 10.2 (7.7–14.5) |
| Harbour workers | 82 | 5.8 (2.2–19.0)* | 10.5 (6.6–15.6) |
| Age | |||
| <median (48 years) | 83 | 5.8 (2.2–12.7) | 10.2 (7.1–15.6) |
| ⩾median (48 years) | 82 | 7.3 (3.1–19.0)** | 10.4 (6.6–14.5) |
| Smoking | |||
| Non-smokers | 102 | 6.6 (2.2–14.9) | 9.7 (6.6–14.1) |
| Current smokers | 63 | 6.2 (2.5–19.0) | 11.7 (8.7–15.6) |
| Fish consumption 5 days prior to examination | |||
| No | 84 | 6.1 (2.5–14.9) | 10.1 (6.6–15.6) |
| Yes | 81 | 6.7 (2.2–19.0) | 10.4 (7.6–14.5) |
| Amalgam fillings | |||
| None | 42 | 6.7 (2.7–19.0) | 10.0 (7.8–14.5) |
| At least 1 | 123 | 6.4 (2.2–13.4) | 10.4 (6.6–15.6) |
| Lead (blood) | |||
| <median (48.7 μg/l) | 82 | 6.5 (2.2–19.0) | 10.0 (6.6–14.5) |
| ⩾median (48.7 μg/l) | 83 | 6.5 (2.5–12.5) | 10.5 (7.4–15.6) |
| Cadmium (blood) | |||
| <median (0.6 μg/l) | 80 | 6.6 (2.2–13.4) | 9.7 (6.6–13.4) |
| ⩾median (0.6 μg/l) | 85 | 6.2 (2.5–19.0) | 11.4 (8.3–15.6)*** |
| Mercury (blood) | |||
| <median (2.0 μg/l) | 79 | 6.0 (2.5–19.0) | 10.6 (6.6–15.6) |
| ⩾median (2.0 μg/l) | 86 | 7.1 (2.2–13.4) | 10.1 (7.1–14.1) |
| Urinary cadmium | |||
| <median (0.37 μg/g) | 83 | 6.9 (2.2–14.9) | 9.8 (7.1–14.1) |
| ⩾median (0.37 μg/g) | 82 | 5.9 (2.5–19.0) | 10.9 (6.6–15.6)*** |
| Urinary nickel | |||
| <median (0.77 μg/g) | 83 | 6.4 (2.5–14.9) | 10.2 (7.1–15.6) |
| ⩾median (0.77 μg/g) | 82 | 6.6 (2.2–19.0) | 10.5 (6.6–14.5) |
| Urinary mercury | |||
| <median (0.66 μg/g) | 83 | 6.5 (2.2–19.0) | 10.3 (6.6–15.6) |
| ⩾median (0.66 μg/g) | 82 | 6.5 (2.5–14.9) | 10.4 (7.1–14.5) |
| Urinary arsenic | |||
| <median (5.5 μg/g) | 82 | 6.4 (2.2–14.9) | 10.4 (6.6–15.6) |
| ⩾median (5.5 μg/g) | 83 | 6.7 (3.0–19.0) | 10.4 (7.1–14.1) |