Table 3.

Distribution of NIH severity classification and symptom onset by serology status. Statistical significance calculated by 2x3 contingency table with Fisher’s exact probability test* and Wilcoxon rank sum test**.

	SARS-CoV-2 Serology
Variable	Negative		Positive
	(IgM-IgG−)		(IgM + IgG−, IgM + IgG+, IgM-IgG+)
	N = 14 (32%)a		N = 30 (68%)a		p-value b
NIH Severity					0.3
asymptomatic	7	50%	20	67%
mild/moderate	3	21%	7	23%
severe	4	29%	3	10%

^aN (%)

^bFisher’s exact test.