Mean (SD) and median levels of prenatal total blood mercury according to fish intake
| Frequency | Oily fish | White fish | ||||
|---|---|---|---|---|---|---|
| N | Mean (SD) | Median | N | Mean (SD) | Median | |
| Never/rarely | 1479 | 1.75 (0.94) | 1.55 | 644 | 1.63 (1.02) | 1.39 |
| Once in 2 weeks | 1139 | 2.28 (1.08) | 2.08 | 1396 | 2.09 (0.99) | 1.92 |
| 1–3 times/week | 803 | 2.52 (1.16) | 2.27 | 1374 | 2.35 (1.14) | 2.10 |
| 4+ times/week | 42 | 2.38 (1.02) | 2.36 | 49 | 2.34 (1.15) | 2.08 |
| R2 | 8.13% | 5.15% | ||||