… Negative effects of O 3 and to a lesser degree for PM 10 during summer were compensated
for during the winter seasons. Over the study period of 3.5 years, they did not detect deficits …

… to assess the effect of ambient air pollution on (1) lung function and (2) current symptoms of
… between pollutant levels and impaired lung function for the winter period both for the single-…

… temperature typically decreases with increasing altitude, but this pattern reverses during
a thermal inversion, with a warm air layer acting as a cap above a cold air layer. The right …

… Our results also differ from those observed in 12 USA cities where cold temperatures had
little effect on respiratory-cause mortality (Braga et al. 2002). Further investigation of the …

… respiratory symptoms were found in the winter months for SO2 mean concentrations (odds
ratio (OR)=1.72; 95% confidence interval (95% CI) 1.19–2.49), NOx mean concentrations (OR…

… winter, while in summer, the two respiratory function … air pollution variations. In time-series
studies, only factors that vary across days with (or against) air pollution and respiratory function …

… years with COPD completed twice daily diaries for three months during the winter … All the
pollution and climatic lung function are presented in table 1. All but variables were considered …

… air pollution health effects in contemporary populations in economically advanced countries
with relatively clean air is not … Acute effects of summer air pollution on respiratory function in …

… The results were similar when the analysis was restricted to the cold months when both
illness rates and air pollution are higher, except that the results for K61n became more similar to …

… respiratory disease hospital admissions as a function of the predictor variables. We examined
in the present study the effect of air pollutants … We therefore assume that in the winter in …