Table 4.

Independent samples test

		Levene’s Test for equality of variances		t-test for equality of Means
		F	Sig	t	df	Sig. (2-tailed)	Mean Difference	Std. Error Difference
$\mathrm{\Delta }Docs\left(\%\right)$, COVID-19/COPD	Equal variances assumed	35.53	0.001	4.690	510	0.001	1.186	.2528
	Equal variances not assumed			4.690	264.809	0.001	1.186	.2528
$\mathrm{\Delta }Docs\left(\%\right)$, COVID-19/LC	Equal variances assumed	37.28	0.001	4.727	510	0.001	1.194	.2524
	Equal variances not assumed			4.727	263.118	0.001	1.194	.2524
$\mathrm{\Delta }Docs\left(\%\right)$, COPD/LC	Equal variances assumed	1.204	0.273	.161	510	.872	.00758	.0470
	Equal variances not assumed			.161	505.496	.872	.00758	.0470

N = 256 days over April-December 2020 period. Δ = increment; Docs = documents