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Table 2 Spearson correlation coefficients between ILI, climatic factor and air pollutants in Jinan (1 January 2016–31 December 2017)

From: The short-term effects of air pollutants on influenza-like illness in Jinan, China

Variables ILI Mean temperature Relative humidity PM2.5/PM10 O3 CO SO2 NO2
ILI 1        
Mean temperature −0.62** 1       
Relative humidity −0.26** 0.26** 1      
PM2.5/PM10 0.31**/0.31** −0.35**/−0.32** 0.038/− 0.217** 1     
O3 −0.51** 0.80** −0.09* −0.20**/− 0.13** 1    
CO 0.30** −0.42** 0.19** 0.77**/0.64** −0.38** 1   
SO2 0.45** −0.61** −0.46** 0.59**/0.63** −0.32** 0.62** 1  
NO2 0.31** −0.54** −0.13** 0.64**/0.66** −0.46** 0.74** 0.63** 1
  1. Note: ** p < 0.001, * p < 0.05