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Table 3 Different exposure and risk behaviours at 1 year after birth and the change in annual prevalence for the intervention cohort and for the control cohort (PACT 2009).

From: A primary health-care intervention on pre- and postnatal risk factor behavior to prevent childhood allergy. The Prevention of Allergy among Children in Trondheim (PACT) study

  Intervention Cohort (n = 1214)   Control Cohort (n = 3892)
  Rate % 95% CI P trend* Rate % 95% CI P trend* OR* 95% CI
At 1 year after birth           
Maternal smoking 105/1198 8.8 7.3-10.5 0.17 720/3755 19.2 18.0-20.5 <0.001 0.47 0.38-0.59
Paternal smoking 148/1144 12.9 11.1-15.0 0.15 724/3468 20.9 19.6-22.3 <0.001 0.64 0.52-0.77
Keeping dog in house 95/1139 8.3 6.9-10.1 0.11 318/3560 8.9 8.0-9.9 0.74 0.90 0.71-1.16
Keeping cat in house 122/1139 10.7 9.0-12.7 0.87 312/3560 8.8 7.9-9.7 0.46 1.33 1.06-1.67
Indoor dampness index 47/1205 3.9 2.9-5.2 0.44 158/3800 4.2 3.6-4.8 0.27 1.00 0.72-1.41
Children's diet at 1 year of age           
Exclusively breastfed 4 months or more 957/1206 79.4 77.0-81.5 0.008 274/3856 71.1 69.6-72.5 0.14 1.46 1.25-1.72
Cod liver oil 4 times a week or more 568/1209 47.0 44.2-49.8 0.34 1497/3858 38.8 37.3-40.4 0.77 1.27 1.11-1.46
Any kind of fish once a week or more 712/1213 58.7 55.9-61.4 0.03 1879/3872 48.5 47.0-50.1 0.06 1.53 1.33-1.74
Oily fish once a week or more 445/1213 36.7 34.0-39.4 0.02 908/3878 23.4 22.1-24.8 <0.001 1.88 1.63-2.17
Lean fish once a week or more 582/1204 48.3 45.5-51.2 0.29 1679/3855 43.6 42.0-45.1 0.46 1.24 1.08-1.42
Vegetables almost daily 889/1198 74.2 71.7-76.6 0.76 2910/3814 76.3 75.0-77.7 0.79 0.87 0.74-1.01
  1. Comparisons of risk behaviour between the control cohort and the intervention cohort are presented as OR with 95% CI (Based on logistic regression). Change in annual prevalence (intervention cohort 2005-2008, control cohort 2000-2004) presented as p- value for trend. *Adjusted for maternal age, parity, parental atopy, homeowner.