Our study results suggest that parent reported medically diagnosed asthma and allergy prevalences, and the related symptoms in Bavarian preschool children are quite stable with small fluctuations since 2004.
Recent data concerning time trends in asthma and allergies in preschool children is inconclusive within Germany and Europe.
Standardized, repeated data collection is needed to get valid and reliable knowledge about asthma and allergy prevalences, which can then be used to observe trends over time.