A combined analysis of the short-term effects of photochemical air pollutants on mortality within the EMECAM project.

Concerning the short-term effects of NO2, an overall significant increase in the total number of deaths by 1.3% (95% CI, 0.9-1.8%) for every 50 g/m3 NO2 (1- hr maximum) levels was found, and the individual RRs ranged from 0.5 to 2.7%. Likewise, O3 was a significant predictor of respiratory mortality (41) (RR of 1.05 asso- ciated with a 50 g/m3 increase) and cardio- vascular mortality (RR = 1.02), and NO2 was marginally significant for mortality due to cardiovascular causes (RR = 1.01).

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