Table 2. Risk of Positive SARS-CoV-2 Test Results, Hospitalization Among Individuals With Positive SARS-CoV-2 Test Results, and ICU Admission Among Patients Hospitalized With COVID-19 by Blood Type^a.

Outcome	Type A vs Type O, OR (95% CI)	P value	Type B vs Type O, OR (95% CI)	P value	Type AB vs Type O, OR (95% CI)	P value
All individuals
Positive test results	0.97 (0.93-1.01)	.11	0.96 (0.89-1.03)	.25	0.96 (0.86-1.07)	.48
Hospitalized	0.89 (0.80-0.99)	.03	0.91 (0.75-1.09)	.30	1.02 (0.77-1.35)	.91
ICU admission	0.84 (0.69-1.02)	.08	0.89 (0.64-1.23)	.47	0.69 (0.40-1.18)	.17
White individuals only
Positive test results	0.97 (0.93-1.01)	.17	0.94 (0.87-1.01)	.10	0.94 (0.83-1.07)	.34
Hospitalized	0.88 (0.78-0.99)	.04	0.92 (0.74-1.13)	.42	0.92 (0.66-1.28)	.63
ICU admission	0.89 (0.71-1.11)	.30	0.94 (0.64-1.39)	.76	0.81 (0.43-1.53)	.51

Abbreviations: ICU, intensive care unit; OR, odds ratio.

^aModels were adjusted for age, sex, and Rh factor. Given that each set underwent 9 comparisons, significance for individual comparisons was set at P = .006.