Frequency of low birth weight (LBW), preterm delivery, and intrauterine growth retardation (IUGR) and mean (SD) birth weight, mean gestation length, and mean birth weight adjusted for length of gestation, according to frequency of fish intake. Only those mothers who ate no shellfish included in the analysis
| LBW% (n) | Preterm% (n) | IUGR% (n) | Birth weight | Gestation (weeks) | Adjusted* birth weight | |
|---|---|---|---|---|---|---|
| *Adjusted for sex and gestation; †p value adjusted for sex of infant, maternal smoking, age, parity, height, pre-pregnant weight, education, cohabitant status, and alcohol consumption. | ||||||
| FREQ0 (n = 1536) | 4.4 (66) | 4.4 (68) | 12.4 (187) | 3385 (539) | 39.5 (1.7) | 3373 (463) |
| FREQ1 (n = 3591) | 4.4 (156) | 5.0 (178) | 9.4 (335) | 3423 (531) | 39.5 (1.8) | 3417 (442) |
| FREQ2 (n = 2753) | 3.8 (103) | 4.4 (122) | 8.2 (223) | 3454 (507) | 39.5 (1.7) | 3435 (439) |
| FREQ3 (n = 1471) | 3.3 (48) | 4.5 (66) | 7.1 (103) | 3460 (510) | 39.5 (1.7) | 3451 (433) |
| p χ2 | 0.260 | 0.724 | <0.001 | <0.001 | 0.846 | <0.001 |
| p linear trend | 0.064 | 0.714 | <0.001 | <0.001 | <0.001 | |
| Adj p linear trend† | 0.492 | 0.418 | 0.017 | 0.360 | 0.356 | |