Table 6.

Sensitivity analysis for the comparison of three multivariable models of the association between weather factors (14-day exponential moving average) and reported cases of COVID-19 caused by the B.1.617.2 (delta) variant of SARS-CoV-2, Sydney, Australia from 16 June to 10 September, 2021

Model	Factor	Days used for exponential moving average
		7-day			14-day			21-day
		Estimate (SE)	Z	P-value	Estimate (SE)	Z	P-value	Estimate (SE)	Z	P-value
1	Intercept	14.59 (1.13)	12.89	< 0.001	16.37 (1.06)	15.52	< 0.001	17.30 (0.82)	21.16	< 0.001
	9:00 am humidity	− 0.13 (0.02)	− 8.23	< 0.001	− 0.15 (0.01)	− 10.49	< 0.001	− 0.16 (0.01)	− 14.55	< 0.001
2	Intercept	− 1.03 (0.05)	− 22.3	< 0.001	− 2.74 (1.03)	− 2.66	0.008	− 3.64 (0.86)	− 4.23	< 0.001
	9:00 am temperature	0.54 (0.003)	158.0	< 0.001	0.68 (0.09)	8.00	< 0.001	0.77 (0.07)	10.70	< 0.001
3	Intercept	3.89 (0.12)	33.18	< 0.001	10.24 (2.66)	3.86	< 0.001	11.28 (2.29)	4.93	< 0.001
	9:00 am humidity	− 0.05 (0.001)	− 44.97	< 0.001	− 0.11 (0.02)	− 5.30	< 0.001	− 0.12 (0.02)	− 7.00	< 0.001
	9:00 am temperature	0.40 (0.005)	86.44	< 0.001	0.25 (0.11)	2.21	0.027	0.25 (0.10)	2.55	0.011
4	Intercept	− 8.33 (8.05)	− 1.03	0.301	− 34.29 (8.93)	− 3.84	< 0.001	− 42.85 (7.65)	− 5.60	< 0.001
	9:00 am humidity	0.13 (0.11)	1.22	0.224	0.52 (0.12)	4.20	< 0.001	0.66 (0.11)	6.10	< 0.001
	9:00 am temperature	1.67 (0.66)	2.55	0.011	4.23 (0.75)	5.65	< 0.001	5.17 (0.66)	7.83	< 0.001
	9:00 am humidity × 9:00 am temperature	− 0.02 (0.01)	− 2.05	0.040	− 0.06 (0.01)	− 5.34	< 0.001	− 0.07 (0.01)	− 7.48	< 0.001