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Table 1 Spearman’s correlation between daily weather conditions, air pollutants and pediatric pneumonia in Brisbane, Australia, from 2001–2010

From: Temperature variability and childhood pneumonia: an ecological study

  Mean temperature DTR TCN Relative humidity Rainfall PM10 O3 NO2 Pneumonia
Mean temperature 1.00         
DTR -0.44* 1.00        
TCN 0.14* 0.03 1.00       
Relative humidity -0.06* -0.33* 0.09* 1.00      
Rainfall 0.16* -0.49* -0.03 0.38* 1.00     
PM10 0.16* 0.31* 0.08* -0.29* -0.31* 1.00    
O3 0.03 0.20* 0.03 -0.28* -0.07* 0.31* 1.00   
NO2 -0.67* 0.42* -0.02 0.13* -0.14* 0.01 -0.10* 1.00  
Pneumonia -0.37* 0.21* -0.01 0.03 0.06* 0.07* 0.10* 0.28* 1.00
  1. *P < 0.01; DTR, Diurnal temperature range; TCN, temperature change between two neighbouring days.