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- W2022397309 abstract "This study was conducted in Switzerland between May and October 1989 to assess possible decrements in lung function occurring as a result of 10 minute exposure to ambient air containing different ozone concentrations. Once a month, 128 children in two different areas of Southern Switzerland (Chiasso and Aurigeno) had a pulmonary function test before and after a standardized 10 minute exercise (pulse rate, 170imin) on a cycle ergometer, outdoors. Ozone concentrations were similar in both areas, ranging from 40 to 157 μg/m3 (112h means) during the exercise tests. The two communities differed with respect to long-term average pollution levels. The mean NO2 concentration over the six months study period was 70 μg/m3 in Chiasso and 18 μg/m3 in rural Aurigeno. Of the eligible children 85% participated and attended 4–6 tests. Parents completed a standardized questionnaire on family background, home characteristics and the child's early and present illness history. A total of 500 acceptable pairs of spirograms and corresponding ozone concentrations (average 3.8 per child) were available for analysis. Regressions of each individual's pre-post differences of FVC, FEV, and peak flow on ozone concentrations measured during the outdoor exercise indicated that elevated ozone levels significantly reduced peak flow values. Adjustments for temperature and relative humidity increased the magnitude of the peak flow slopes. The average adjusted regression coefficient for A-peak flow on ozone was −2.28 mL/s/μg/m3 (95% Cl, −0.57 −3.99). It is noteworthy that the observed relationships occurred at ozone concentrations below 160 μg/m3 and after an exercise duration of only 10 minutes. Pediatr Pulmonol. 1994; 17:169–177. © 1994 Wiley-Liss, Inc." @default.
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- W2022397309 title "Acute effects of ambient ozone on respiratory function of swiss schoolchildren after a 10–minute heavy exercise" @default.
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- W2022397309 doi "https://doi.org/10.1002/ppul.1950170306" @default.
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