LETTERS

摘要

The scientific community is currently very interested in the effect modification of air pollution by meteorological variables. The recent paper by Dr Nawrot and colleagues reports findings from a time-series epidemiology study on the effects of temperature on the association between relative mortality risk and PM_(10) in Belgium. Their 7-year data showed a stronger overall association and no threshold between PM_(10) and mortality in summer, but a weaker association and a threshold of 30 μg/ m~3 in winter. Based on these findings they state that "the shape of the dose-response relationship curve between air pollution and mortality strongly depends on outdoor temperature".