Table 2.

Multivariable analysis for spread (D_S) and decay (D_D) durations for (a) all countries and (b) individual countries. PD represents the population density. T_ave, T_max, and T_min represent the daily average, maximum, and minimum temperatures, respectively. AH represents the daily average absolute humidity values.

(a)	Variables	R2	adj. R2	p-value	VIF	Residual
DS	PD, AH	0.32	0.30	<0.0001	1.00	2.77
DD	PD, Tmax, AH	0.35	0.32	<0.0001	1.74	6.60

(b)	Variables	R2	adj. R2	p-value	VIF	Residual
China
DS	AH	0.12	0.03	0.27	1.00	1.79
DD	Tmax, AH	0.21	0.03	0.35	7.88	1.78
England
DS	PD, Tmin	0.39	0.30	<0.05	1.12	2.45
DD	AH	0.12	0.06	0.16	1.00	6.34
Germany
DS	Tmin	0.10	0.04	0.20	1.00	2.71
DD	PD, Tave, AH	0.68	0.61	<0.001	2.44	2.37
Japan
DS	PD, AH	0.66	0.60	<0.005	1.02	1.47
DD	PD, Tmax	0.40	0.29	0.06	1.20	4.10