[Relationship between pseudocroup and air pollutant burden of the inhaled air and weather]. / Zusammenhang zwischen Auftreten von Pseudokrupp und Schadstoff-belastung der Atemluft und Wetter.

An epidemiological study is presented to demonstrate, in addition to the viral aetiology, the influence of airpollution and various weather conditions to the incidence of croup. By means of a special statistic tool (baseline data curves) we could demonstrate that rapid changes in airpollutants (especially NO and NO2) are followed by increased occurrence of croup. In addition, the quotient NO2/NO seems to correlate directly to the O3 concentration. The noticeable influence of airpollution as well as changing climatic conditions demonstrate the multiform aetiology of croup.