Table 2.
Occurrences of low birth weight, preterm delivery, and intrauterine growth retardation, and mean birth weight, gestation length, and birth weight adjusted for gestation length, according to quantified daily intake of long chain n-3 fatty acids
| Group* | Dichotomous outcomes (No (%))
|
Continuous outcomes (mean (SD))
|
|||||
|---|---|---|---|---|---|---|---|
| Low birth weight | Preterm delivery | Intrauterine growth retardation | Birth weight (g) | Gestation (days) | Adjusted birth weight (g) | ||
| QUANT0 (n=282) | 20 (7.1) | 20 (7.1) | 23 (8.2) | 3432 (589) | 278.8 (14.3) | 3466 (490) | |
| QUANT1 (n=1723) | 54 (3.1) | 71 (4.1) | 152 (8.8) | 3543 (543) | 281.7 (11.9) | 3494 (486) | |
| QUANT2 (n=1618) | 52 (3.2) | 61 (3.8) | 116 (7.2) | 3572 (559) | 281.8 (12.4) | 3521 (481) | |
| QUANT3 (n=1890) | 34 (1.8) | 45 (2.4) | 96 (5.1) | 3592 (498) | 282.2 (10.4) | 3532 (446) | |
| QUANT4 (n=1419) | 35 (2.5) | 50 (3.5) | 91 (6.4) | 3581 (521) | 282.2 (11.3) | 3520 (455) | |
| QUANT5 (n=1775) | 37 (2.1) | 52 (2.9) | 94 (5.3) | 3617 (518) | 282.4 (11.0) | 3550 (457) | |
| Statistical tests | |||||||
| Between groups (P value) | <0.001† | 0.001† | 0.001† | 0.001‡ | 0.001‡ | 0.004‡ | |
| Linear trend (P value) | <0.001 | 0.003 | 0.001 | 0.001 | 0.001 | 0.001 | |
*
See text for definitions of the six groups. †Pearson χ2. ‡Analysis of variance.