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Table 2 Spearman correlation coefficients between daily ambient air pollutant and meteorological parameters

From: Ambient air pollution and respiratory mortality in Xi’an, China: a time-series analysis

  PM2.5 SO2 O3 Temperature
SO2 0.670**    
O3 − 0.441** − 0.666**   
Temperature −0.431** −0.786** 0.778**  
Humidity 0.041 −0.248** −0.240** 0.058
  1. **P < 0.01