Table 4.

Generalized additive model test results between mean temperature, temperature humidity index, index of wind effect, air quality index, PM_2.5, 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%