Intervention Cohort (n = 1685) | Control Cohort (n = 3142) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Rate | % | 95% CI | P trend* | Rate | % | 95% CI | P trend* | OR* | 95% CI | |
At start pregnancy | ||||||||||
Maternal smoking | 283/1636 | 17.3 | 15.5-19.2 | 0.001 | 702/2969 | 23.6 | 22.2-25.2 | 0.01 | 0.70 | 0.60-0.82 |
Paternal smoking | 292/1594 | 18.3 | 16.5-20.3 | 0.001 | 652/2803 | 23.3 | 21.7-24.9 | 0.03 | 0.80 | 0.68-0.94 |
During pregnancy | ||||||||||
Maternal cod liver oil 4 times a week or more | 1098/1660 | 66.1 | 63.8-68.4 | 0.59 | 1288/3055 | 42.2 | 40.4-43.9 | 0.16 | 2.44 | 2.15-2.78 |
Maternal oily fish intake once a week or more | 624/1553 | 40.2 | 37.8-42.6 | 0.61 | 858/2812 | 30.5 | 28.8-32.2 | 0.36 | 1.51 | 1.32-1.72 |
Maternal lean fish intake once a week or more | 658/1666 | 39.5 | 37.2-41.9 | 0.61 | 807/3055 | 26.4 | 24.9-28.0 | 0.40 | 1.80 | 1.58-2.06 |
Maternal vegetable almost daily | 876/1476 | 59.3 | 56.8-61.9 | 0.25 | 1548/2704 | 57.2 | 55.4-59.1 | 0.15 | 1.06 | 0.93-1.21 |
At 6 weeks after birth | ||||||||||
Maternal smoking | 87/1634 | 5.3 | 4.3-6.5 | 0.002 | 317/2934 | 10.8 | 9.7-12.0 | <0.001 | 0.55 | 0.42-0.70 |
Paternal smoking | 200/1587 | 12.6 | 11.1-14.3 | 0.04 | 593/2768 | 21.4 | 19.9-23.0 | 0.01 | 0.59 | 0.49-0.70 |
Keeping dog in house | 142/1566 | 9.1 | 7.7-10.6 | 0.69 | 289/2826 | 10.2 | 9.16-11.4 | 0.95 | 0.83 | 0.67-1.03 |
Keeping cat in house | 174/1566 | 11.1 | 9.7-12.8 | 0.58 | 251/2826 | 8.9 | 7.9-10.0 | 0.90 | 1.32 | 1.07-1.64 |
Indoor dampness Index ≥3 | 69/1672 | 4.1 | 3.3-5.2 | 0.66 | 129/3062 | 4.2 | 3.6-5.0 | 0.88 | 1.08 | 0.79-1.46 |
Breastfeeding | 1644/1665 | 98.7 | 98.1-99.2 | 0.39 | 3061/3110 | 98.4 | 97.9-98.8 | 0.81 | 1.00 | 0.59-1.71 |
Child having cod liver oil supplement | 1011/1665 | 60.7 | 58.4-63.0 | 0.57 | 1786/3102 | 57.6 | 55.8-59.3 | 0.66 | 1.03 | 0.93-1.21 |