. 2021 Feb 5;24(Suppl 1):S-35–S-42. doi: 10.1089/pop.2020.0256

Table 2.

Multivariate Logistic Regression of SARS-CoV-2 Serum IgG Positivity by NAAT Result, for Simultaneous IgG and NAAT Testing

Predictor	Odds ratio estimates (95% confidence limits)	P
NAAT Positive (n = 3868)
State (NY/NJ/MA/RI/CT vs Other States)	10.3 (8.8, 12.0)	<.0001
Age in years (≥35 vs 2–34)	1.7 (1.4, 2.0)	<.0001
Sex (M vs F)	1.1 (0.9, 1.3)	.4
CCI^* (≥1 vs None)	1.5 (1.3, 1.8)	<.0001
NAAT Negative (n = 186,301)
State (NY/NJ/MA/RI/CT vs Other States)	6.8 (6.4, 7.2)	<.0001
Age in years (≥35 vs 2–34)	1.1 (1.1, 1.2)	<.0001
Sex (M vs F)	1.0 (1.0, 1.1)	.007
CCI^* (≥1 vs None)	1.2 (1.2, 1.3)	<.0001

Logistic regression modeling IgG positive versus IgG negative with all predictors in the model, stratified by NAAT result.

^{^*}

Compare ≥1 CCI vs. no CCI.

CCI, chronic condition indicator; IgG, immunoglobulin G; NAAT, nucleic acid amplification testing; SARS-CoV-2, severe acute respiratory syndrome coronavirus-2.