Table 1.

Comparison of the per capita rates in incarcerated individuals, staff, and county populations in non-administrative federal prisons between May 18, 2020 to Jan 31, 2021 ("Overall"), and May 18 to Sep 30, 2020 ("Summer wave"), and Oct 1, 2020 to Jan 31, 2021 ("Winter wave")

	Mean difference	Paired Student’s t-test p-value	Risk Ratio
Overall
pinmate – pstaff	[0.01,0.14]	0.025	1.22
pinmate – pcounty	[0.24,0.38]	< 0.001	4.47
pstaff – pcounty	[0.18,0.29]	< 0.001	3.89
Summer wave
pinmate – pstaff	[-0.02,0.04]	0.53	1.15
pinmate – pcounty	[0.02,0.09]	< 0.001	4.32
pstaff – pcounty	[0.03,0.06]	< 0.001	3.36
Winter wave
pinmate – pstaff	[0.01,0.12]	0.030	1.24
pinmate – pcounty	[0.19,0.32]	< 0.001	4.51
pstaff – pcounty	[0.14,0.25]	< 0.001	4.03