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Table 1 Characteristics and correlations of monthly average concentration of ambient pollutants in Beijing, 2006-2010

From: Ambient air pollution and adverse birth outcomes: a natural experiment study

Pollutants Concentration Correlation coefficients
Mean Std dev Min Max   SO2 NO2 CO PM10
SO2 (ug/m3) 37.52 32.03 8.00 142.00 SO2 1.00 0.64 0.87 0.45
NO2 (ug/m3) 58.07 13.10 23.00 83.00 NO2 0.64 1.00 0.78 0.55
CO (mg/m3) 1.73 0.68 0.80 3.90 CO 0.87 0.78 1.00 0.45
PM10 (ug/m3) 134.72 35.16 69.00 264.00 PM10 0.45 0.55 0.45 1.00