Table 4.
Crude and adjusted* odds ratios (95% CI) for low birth weight, preterm delivery, and intrauterine growth retardation according to quantified daily intake of long chain n-3 fatty acids (n=7902). The highest intake group (QUANT5) is used as reference
| Group† | Low birth weight | Preterm delivery | Intrauterine growth retardation |
|---|---|---|---|
| QUANT0: | |||
| Crude | 4.37 (2.43 to 7.87) | 2.95 (1.67 to 5.20) | 1.52 (0.91 to 2.55) |
| Adjusted | 3.22 (4.73 to 6.00) | 2.69 (1.49 to 4.84) | 1.14 (0.67 to 1.98) |
| QUANT1: | |||
| Crude | 1.61 (1.02 to 2.55) | 1.61 (1.09 to 2.37) | 1.73 (1.31 to 2.28) |
| Adjusted | 1.31 (0.82 to 2.10) | 1.48 (0.99 to 2.21) | 1.45 (1.09 to 1.94) |
| QUANT2: | |||
| Crude | 1.69 (1.07 to 2.68) | 1.48 (0.99 to 2.21) | 1.41 (1.05 to 1.90) |
| Adjusted | 1.54 (0.97 to 2.46) | 1.44 (0.96 to 2.16) | 1.31 (0.97 to 1.77) |
| QUANT3: | |||
| Crude | 0.98 (0.60 to 1.61) | 0.90 (0.59 to 1.38) | 1.02 (0.76 to 1.38) |
| Adjusted | 0.99 (0.60 to 1.63) | 0.90 (0.59 to 1.39) | 1.03 (0.76 to 1.40) |
| QUANT4: | |||
| Crude | 1.12 (0.67 to 1.88) | 1.28 (0.83 to 1.96) | 1.16 (0.85 to 1.59) |
| Adjusted | 1.16 (0.69 to 1.94) | 1.31 (0.85 to 2.01) | 1.25 (0.91 to 1.72) |
| QUANT5: | |||
| Reference | 1.0 | 1.0 | 1.0 |
| Statistical tests (dietary variable modelled as five indicator variables) | |||
| Crude (P value) | 0.0003 | <0.0001 | 0.0003 |
| Adjusted (P value) | 0.004 | 0.003 | 0.09 |
*
Adjusted for maternal smoking, alcohol consumption, age, parity, height, pre-pregnant weight, length of education, and cohabitant status (see text).
†
See text for definitions of six groups.