Table 3.

Bivariate and multivariate logistic regression of risk factors and N-antibody positivity: residents

Factor		N-Ab positive, (percent)	Unadjusted OR	95% CI	Adjusted OR	95% CI
Gender	M	111 (65.3)	1	Ref	1	Ref
	F	97 (59.9)	1.11	0.67, 1.83	0.96	0.548, 1.69
Age group (years)	Under 65	53 (46.5)	1	Ref	1	Ref
	65–74	56 (66.7)	1.76	0.92, 3.39	1.88	0.92,3.849
	75–84	48 (71.6)	2.04	0.99, 4.21	2.33	1.01, 5.39
	85 or older	51 (76.1)	5.16	2.13, 12.50	6.84	2.52, 18.58
Ethnic-racial group	Non-Hispanic white	125 (69.8)	1	Ref	1	Ref
	Non-Hispanic African-American	29 (47.5)	0.87	0.38, 2.02	1.15	0.45, 2.91
	Hispanic	13 (37.1)	0.52	0.21, 1.31	0.76	0.27, 2.09
	Non-Hispanic Asian	29 (70.7)	0.96	0.41, 2.27	0.71	0.28, 1.82
Admitted before 3/2020c	Yes	146 (69.9)	3.27	1.84, 5.79	3.52	1.90, 6.52
	No	58 (49.2)			1	Ref

Frequencies, percentages, unadjusted and adjusted odds ratios, and 95% confidence intervals

Odds ratios with confidence intervals excluding 1.0 are bolded

Model: N-antibody = gender, age group, ethnic-racial group, admitted to facility before 3/20/2020, n = 332^a

^aFive residents had an equivocal N-antibody test result

^b16 residents with unknown race/ethnicity

^cFive residents with unknown admission date