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Table 6 Pearson correlation coefficients between indoor bacterial concentration & physical indoor air quality parameters in public primary schools of Gondar city, Northwest Ethiopia, 2018. (n = 51)

From: Indoor bacterial load and its correlation to physical indoor air quality parameters in public primary schools

Variables Bacteria CO2 T (°C) RH (%) PM2.5 PM10
Morning
 Bacteria 1.00      
 CO2 0.1049 1.00     
 T °C 0.0007 −0.0928 1.00    
 RH% −0.7034a 0.2237 −0.0839 1.00   
 PM2.5 0.5723a 0.2226 −0.0767 − 0.3634a 1.00  
 PM10 0.6856a 0.1573 −0.0762 −0.5493a 0.9447a 1.00
Afternoon
 Bacteria 1.00      
 CO2 −0.1641 1.00     
 T °C 0.3838a −0.1820 1.00    
 RH% −0.4014a 0.4510a −0.8420a 1.00   
 PM2.5 −0.1100 0.6676a −0.2036 0.4368a 1.00  
 PM10 0.1856 0.5418a 0.2903a −0.0771 0.4460a 1.00
  1. N.B = a Correlation is significant at the 0.05 level; Carbon dioxide, (ppm); Temperature, T (°C); Relative humidity, RH (%); concentration of particulate matter PM10 and PM2.5 (μg/m3)