We investigated whether the effect of air pollution on daily mortality is enhanced by high temperatures in Wuhan, China using data from 2001-2004. Wuhan has been called an "oven" city because of its hot summers. Approximately 4.5 million permanent residents live in the 201 km2 core area of the city.
We used a generalized additive model to analyze pollution, mortality, and covariate data. The estimates of the interaction between high temperature and air pollution were obtained from the main effects and pollutant-temperature interaction models.