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. 2021 Apr 15;28(33):45087–45095. doi: 10.1007/s11356-021-13834-5

Table 4.

Generalized additive model test results between mean temperature, temperature humidity index, index of wind effect, air quality index, PM2.5, PM10, NO2, and SO2 and daily confirmed coronavirus disease 2019 cases

T THI K AQI PM2.5 PM10 NO2 SO2
Edf 1.948 1.916 1.025 1.262 2.26 2.856 2.04 2.856
Ref.df 2.176 1.993 1.010 1.343 2.896 2.987 2.434 2.984
P-value < 2e-16 0.002 0.028 0.0002 < 2e-6 < 0.004 < 0.007 < 8e-6
Adjusted R2 0.238 0.303 0.158 0.116 0.052 0.011 0.034 0.019
Deviance explained 31.1% 36.4% 22.2% 13.1% 7.8% 4.7% 4.8% 6.7%