Table 2. Binary logistic regression analysis of independent predictors of positive anti-SARS CoV-2 Ig levels.

Covariates	Odds ratio	95% CI	p-value
Age *	0.893	0.833–0.957	0.001
The model was not statistically significant X2 = 10.183, p = 0.001; it explained 0.1% (Nagelkerke R2) of the variance and correctly classified 70.1% of cases.
Gender	0.946	0.888–1.009	0.089
The model was not statistically significant X2 = 2.886, p = 0.089; it explained 0.0% (Nagelkerke R2) of the variance and correctly classified 70.1% of cases.
Age *	0.891	0.832–0.955	0.001
Gender	0.943	0.885–1.005	0.073
The model was not statistically significant X2 = 13.398, p = < 0.001; it explained 0.1% (Nagelkerke R2) of the variance and correctly classified 70.1% of cases.

*two age categories: 50 years of age or younger and > 50 years of age.