Exhibit 4:

Association between race/ethnicity and odds of hospitalization or hazards of death in patients with positive coronavirus disease 2019 infection

Variable	Hospitalization adjusted odds ratio (n = 2,219)a	Mortality adjusted hazard ratio, (n = 2,219)b
Race/ethnicity
Non-Hispanic White	Ref	Ref
Non-Hispanic Black	2.15****	1.11
Hispanic	2.03***	2.09**
Sex
Female	Ref	Ref
Male	1.66****	1.02
Age	1.05****	1.07****
Location
Milwaukee County	0.65	1.46
Waukesha County	0.61	1.21
Washington/Ozaukee County	0.59	0.47
Racine/Kenosha County	0.34**	1.35
Other county/out of state	Ref	Ref
Primary payor
Managed care/commercial	Ref	Ref
Medicare	3.83****	1.75
Medicaid	4.71****	1.91
Self-pay/uninsured	1.66	1.13
Tobacco use status
Nonsmoker	Ref	Ref
Current smoker	1.60**	0.71
Former smoker	1.35**	1.47*
Count of comorbidities
0	Ref	Ref
1–2	0.85	0.59
3–4	0.54***	0.73
5+	0.72*	1.25

SOURCE The Froedtert and the Medical College of Wisconsin Epic medical record.

NOTE

^aUnadjusted odds ratios for model limited to race/ethnicity variables: non-Hispanic White, reference; non-Hispanic Black, 2.13 (p < 0.001); Hispanic, 1.42 (p < 0.10).

^bUnadjusted hazard ratios for model limited to race/ethnicity variables: non-Hispanic White, reference; non-Hispanic Black, 1.32 (p > 0.10); Hispanic, 1.35 (p > 0.10).

^*p < 0.10

^**p < 0.05

^***p < 0.01

^****p < 0.001