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Table 2 Spearman’s correlations between daily weather and air pollutants in five Chinese cities from 2004 to 2008

From: The effects of ambient temperature on cerebrovascular mortality: an epidemiologic study in four climatic zones in China

City Variable Temperature Relative humidity PM10
Beijing Relative humidity 0.35**   
PM10 0.00 0.17**  
NO2 −0.17** 0.21** 0.67**
Tianjin Relative humidity 0.30**   
PM10 −0.07* 0.06*  
NO2 −0.36** 0.08* 0.59**
Shanghai Relative humidity 0.15**   
PM10 −0.18** −0.26**  
NO2 −0.39** −0.16** 0.73**
Wuhan Relative humidity −0.09*   
PM10 −0.20** −0.17**  
NO2 −0.35** −0.17** 0.76**
Guangzhou Relative humidity 0.22**   
PM10 −0.08* −0.15**  
NO2 −0.20** −0.11** 0.88**
  1. *P < 0.05.
  2. **P < 0.01.