RESUMEN
AIM: We search revision of risk determinants of the ongoing allergy epidemic. METHODS: Children numbering 433 born to mothers with allergic disease or sensitisation were selected from the three ongoing probiotic intervention trials for this case-control study. Children who developed atopic eczema or food allergy, had positive skinprick test results or had been prescribed inhaled corticosteroids by the age of 2 years were identified as cases (n = 231), while children without allergic manifestations were the healthy controls (n = 202). The data on early environmental exposures were collected from prospectively documented study records. The statistical analyses were adjusted for potential confounders. RESULTS: Determinants associated with the increased risk of atopic eczema were lower maternal prepregnancy BMI (aOR 0.15, 95% CI: 0.037-0.54) and maternal intrapartum antibiotic treatment (aOR 2.21, 95% CI 1.20-4.10), the latter also linked to obstructive respiratory symptoms (aOR 3.87, 95% CI 1.07-14.06). The risk of allergic sensitisation was associated with lower maternal prepegnancy BMI (aOR 0.18, 95% CI 0.43-0.79) and intrapartum antibiotic treatment (aOR 2.13, 95% CI 1.07-4.22). CONCLUSION: Based on our demonstrations, interventions such as personalised diets, can be optimised for specific subgroups and definite risk periods.