Table 1.
Selected participant characteristics according to servings of total seafood intake; Omega study, Washington State, USA, 1996–2008
| Total seafood intake (servings) | ||||||||
|---|---|---|---|---|---|---|---|---|
| <0·2/month (n 302) | 0·2/month–<0·5/week (n 320) | 0·5–1/week (n 541) | >1/week (n 2116) | |||||
| Characteristic | n | % | n | % | n | % | n | % |
| Non-Hispanic White† | 272 | 90·1 | 283 | 88·4 | 474 | 87·6 | 1841 | 87·0 |
| High school/less education*,† | 21 | 7·0 | 19 | 5·9 | 25 | 4·6 | 46 | 2·2 |
| Unmarried*,† | 45 | 14·9 | 31 | 9·7 | 45 | 8·3 | 217 | 10·3 |
| Nulliparous† | 195 | 64·6 | 179 | 55·9 | 317 | 58·6 | 1321 | 62·4 |
| Pre-pregnancy BMI (kg/m2)*,† | ||||||||
| <18·5 | 22 | 7·3 | 12 | 3·8 | 18 | 3·3 | 86 | 4·1 |
| 18·5–<25·0 | 199 | 65·9 | 219 | 68·4 | 399 | 73·8 | 1520 | 71·8 |
| 25·0–<30·0 | 55 | 18·2 | 56 | 17·5 | 76 | 14·0 | 342 | 16·2 |
| ≥30·0 | 26 | 8·6 | 32 | 10·0 | 48 | 8·9 | 163 | 7·7 |
| Current smoking† | 24 | 7·9 | 17 | 5·3 | 28 | 5·2 | 110 | 5·2 |
| Current alcohol intake | 69 | 22·8 | 70 | 21·9 | 126 | 23·3 | 590 | 27·9 |
| No current recreational physical activity† | 59 | 19·5 | 65 | 20·3 | 108 | 20·0 | 359 | 17·0 |
| Fish-oil supplement use | 1 | 0·3 | 6 | 1·9 | 7 | 1·3 | 34 | 1·6 |
| Mean | sd | Mean | sd | Mean | sd | Mean | sd | |
| Age (years)*,† | 31·4 | 5·0 | 32·1 | 4·6 | 32·5 | 4·2 | 33·0 | 4·2 |
| Gestational week at delivery† | 38·8 | 2·0 | 38·8 | 1·8 | 38·8 | 1·8 | 38·9 | 1·9 |
| Gestational weight gain (kg)*,† | 16·8 | 6·2 | 16·2 | 5·9 | 16·0 | 5·7 | 15·9 | 5·5 |
| Erythrocyte EPA+DHA (% of total fatty acids)*,† | 4·3 | 1·2 | 4·7 | 1·0 | 4·9 | 0·8 | 5·6 | 1·1 |
| Median | IQR | Median | IQR | Median | IQR | Median | IQR | |
| Dietary EPA+DHA (g/week)* | 0·0 | 0·0–0·0 | 0·1 | 0·0–0·1 | 0·3 | 0·1–0·4 | 0·9 | 0·6–1·3 |
| Total energy (kJ/d)† | 6275 | 4959–8199 | 6156 | 4733–7832 | 6492 | 5209–7996 | 7198 | 5808–8811 |
| Total energy (kcal/d)† | 1499·7 | 1185·1–1959·7 | 1471·3 | 1131·3–1872·0 | 1551·6 | 1244·9–1911·2 | 1720·3 | 1388·1–2105·9 |
| Total fat (g/d)† | 52·8 | 39·4–68·6 | 49·8 | 36·2–66·0 | 52·2 | 39·1–69·3 | 60·5 | 45·7–77·7 |
| Red/processed meats (servings/d)† | 0·4 | 0·0–0·7 | 0·5 | 0·3–0·8 | 0·5 | 0·3–0·8 | 0·6 | 0·3–0·9 |
IQR, interquartile range.
*
P<0·05 from Pearson’s χ 2 test for comparisons across highest v. lowest seafood intake categories for categorical or binary variables, or from one-way ANOVA test for differences in means across seafood intake categories for continuous variables.
†
Some participants have missing values for these characteristics.