… respiratory effects of ambient air pollution were studied in a panel of 73 children with chronic
respiratory symptoms in the winter … rence of acute respiratory symptoms and medication use …

… The parents of the children were asked to fill in a self-completion version of the WHO
children's questionnaire for chronic respiratory syrnpt~ms.'~ The questionnaire gleaned information …

… of winter air pollution used a screening questionnaire to recruit children with chronic respiratory
symptoms [17… In the mild asthmatic group, air pollution was related both to daily symptom …

… short-term effects of winter air pollution on asthma attacks and symptoms, as well as on PEF
… winter air pollution on respiratory health of children with chronic respiratory symptoms. Am …

… with regard to asthmatic symptoms, we chose “wheezing without cold” as an outcome …
severe respiratory infection before the age of 5 yr. Furthermore, analyses were restricted to …

… The uncertainties surrounding acute eVects of episodes of winter smog in … of winter air
pollution in selected panels of children and adults, with and without chronic respiratory symptoms, …

… between pulmonary function and air pollution was assessed … of both air pollution and
pulmonary function were included in … of children with chronic respiratory symptoms. All regression …

… In conclusion, daily variations in ambient air pollution during the cold of winter were not …
challenge test among children with chronic respiratory symptoms. However, high concentrations …

… Chronic cough was defined as a cough associated with a respiratory infection and having …
night, apart from a cough associated with a cold or chest infection?" Wheeze was defined as a …

… winter pollution in Denver increased symptoms and medication use in subjects with severe
… significance but occurred at levels of ambient pollution less than current EPA standards. In …