Table 2.
Blood mercury levels (μg/L) by fish consumption and gender, KNHANES IV 2008–2009
| Variables | Total (n=3,270) | Males (n=1,548) | Females (n=1,722) | P value3) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
|
||||||||
| N | % wt1) | Mercury (SE)2) | N | % wt | Mercury (SE) | N | % wt | Mercury (SE) | ||
| Rare | 633 | 16.83 | 4.73 (0.20) | 279 | 14.78 | 5.45 (0.34) | 354 | 19.54 | 3.92 (0.16) | |
| <1 time/month | 653 | 19.53 | 5.07 (0.16) | 316 | 19.65 | 5.79 (0.26) | 337 | 19.38 | 4.23 (0.18) | |
| 2~4 times/month | 1,582 | 49.53 | 5.55 (0.12) | 759 | 50.74 | 6.59 (0.19) | 823 | 47.93 | 4.30 (0.10) | |
| ≥1 time/week | 402 | 14.13 | 6.13 (0.31) | 194 | 14.85 | 7.39 (0.54) | 208 | 13.17 | 4.67 (0.16) | |
| P value for trend | 0.0983 | 0.2636 | 0.1286 | 0.0048 | ||||||
| Tuna | ||||||||||
| Rare | 1,474 | 45.95 | 5.45 (0.15) | 679 | 45.12 | 6.52 (6.26) | 795 | 47.04 | 4.33 (0.10) | |
| <1 time/month | 58 | 18.08 | 5.37 (0.19) | 299 | 18.91 | 6.05 (0.28) | 288 | 16.99 | 4.40 (0.20) | |
| 2~4 times/month | 1,012 | 29.41 | 5.20 (0.12) | 476 | 29.41 | 6.15 (0.21) | 536 | 29.40 | 4.05 (0.11) | |
| ≥1 time/week | 197 | 6.58 | 5.94 (0.41) | 94 | 6.58 | 7.09 (0.66) | 103 | 6.58 | 4.58 (0.26) | |
| P value for trend | 0.09 | 0.2696 | 0.141 | <0.0001 | ||||||
| Yellow corvina | ||||||||||
| Rare | 1,079 | 30.30 | 4.89 (0.13) | 528 | 30.54 | 5.65 (0.21) | 551 | 29.99 | 3.93 (0.11) | |
| <1 time/month | 768 | 24.58 | 5.53 (0.20) | 383 | 26.43 | 6.53 (0.32) | 385 | 22.14 | 4.19 (0.14) | |
| 2~4 times/month | 1,161 | 36.37 | 5.64 (0.14) | 519 | 34.84 | 6.71 (0.23) | 642 | 38.40 | 4.52 (0.13) | |
| ≥1 time/week | 262 | 8.76 | 5.94 (0.30) | 118 | 8.21 | 7.30 (0.52) | 144 | 9.50 | 4.64 (0.24) | |
| P value for trend | 0.5283 | 0.4645 | 0.6991 | <0.0001 | ||||||
| Pollack | ||||||||||
| Rare | 1,092 | 29.75 | 4.72 (0.11) | 477 | 27.28 | 5.56 (0.19) | 615 | 33.02 | 3.85 (0.09) | |
| <1 time/month | 901 | 27.61 | 5.47 (0.15) | 419 | 28.09 | 6.61 (0.26) | 482 | 26.98 | 4.23 (0.16) | |
| 2~4 times/month | 1,128 | 36.43 | 5.73 (0.14) | 577 | 37.41 | 6.49 (0.22) | 551 | 35.14 | 4.71 (0.13) | |
| ≥1 time/week | 149 | 6.23 | 7.10 (0.83) | 75 | 7.25 | 8.78 (1.37) | 74 | 4.88 | 4.80 (0.32) | |
| P value for trend | 0.9931 | 0.99 | 0.8516 | 0.0067 | ||||||
| Anchovy | ||||||||||
| Rare | 414 | 11.51 | 5.09 (0.25) | 207 | 11.84 | 5.86 (0.40) | 207 | 11.08 | 3.95 (0.16) | |
| <1 time/month | 388 | 10.56 | 4.78 (0.19) | 192 | 11.15 | 5.65 (0.29) | 196 | 9.77 | 3.70 (0.16) | |
| 2~4 times/month | 1,181 | 36.49 | 5.51 (0.15) | 566 | 36.36 | 6.38 (0.24) | 615 | 26.65 | 4.45 (0.14) | |
| ≥1 time/week | 1,287 | 41.46 | 5.53 (0.17) | 583 | 40.67 | 6.69 (0.29) | 704 | 42.51 | 4.34 (0.11) | |
| P value for trend | 0.0007 | 0.1811 | 0.0003 | <0.0001 | ||||||
| Squid | ||||||||||
| Rare | 1,189 | 34.55 | 5.25 (0.14) | 543 | 32.84 | 6.30 (0.25) | 646 | 36.82 | 4.14 (0.11) | |
| <1 time/month | 754 | 23.47 | 5.42 (0.17) | 349 | 23.95 | 6.61 (0.31) | 405 | 22.85 | 4.07 (0.13) | |
| 2~4 times/month | 1,072 | 32.68 | 5.31 (0.13) | 524 | 33.16 | 6.06 (0.20) | 548 | 32.05 | 4.37 (0.14) | |
| ≥1 time/week | 255 | 9.31 | 5.98 (0.38) | 132 | 10.07 | 6.81 (0.62) | 123 | 8.30 | 4.86 (0.27) | |
| P value for trend | 0.2278 | 0.4644 | 0.2761 | <0.0001 | ||||||
| Clam | ||||||||||
| Rare | 1,231 | 34.10 | 4.92 (0.13) | 524 | 30.37 | 5.90 (0.23) | 707 | 39.05 | 4.00 (0.11) | |
| <1 time/month | 777 | 26.08 | 5.73 (0.23) | 404 | 29.11 | 6.69 (0.38) | 373 | 22.06 | 4.37 (0.15) | |
| 2~4 times/month | 1,043 | 32.52 | 5.49 (0.13) | 520 | 34.07 | 6.43 (0.20) | 523 | 30.47 | 4.26 (0.10) | |
| ≥1 time/week | 219 | 7.32 | 5.88 (0.28) | 100 | 6.47 | 6.40 (0.37) | 119 | 8.44 | 5.33 (0.40) | |
| P value for trend | 0.0751 | 0.2622 | 0.09 | 0.0032 | ||||||
1)
Weighted percentages.
2)
Values are mean (standard error).
3)
P value for the within-gender differences in frequency of each variable from the Rao-Scott chi-square test.