Table 3 Independent predictors of T. pallidum seropositivity: odds ratios and 95% confidence intervals from the multivariate logistic regression model
From: Demographic determinants of syphilis seroprevalence among U.S. blood donors, 2011–2012
Variable | OR [95% CI] |
|---|---|
Age | |
16-19 | 1.00 |
20-29 | 11.0 [6.1-19.7] |
30-39 | 16.7 [9.2-30.4] |
40-49 | 41.4 [23.5-73.1] |
50+ | 31.2 [17.6-55.3] |
Donor history | |
Repeat | 1.00 |
First time | 11.1 [8.6-14.3] |
Country of birth | |
USA | 1.00 |
Non-USA | 2.0 [1.5-2.7] |
Education | |
< High school | 1.00 |
High school/Some college | 0.6 [0.5-0.9] |
Bachelors | 0.4 [0.3-0.6] |
Masters/PhD | 0.3 [0.1-0.5] |
Race/Ethnicity | |
Caucasian | 1.00 |
African American | 18.9 [14.2-25.2] |
Hispanic | 2.8 [2.0-3.8] |
Other | 1.9 [1.1-3.3] |
Missing | 3.3 [1.4-7.6] |
HIV Testing | |
Negative | 1.00 |
Positive | 16.6 [4.5-60.5] |
HCV Testing | |
Negative | 1.00 |
Positive | 7.6 [3.9-14.7] |
US Region | |
Northern | 1.00 |
Western | 2.1 [1.4-3.1] |
Southern | 2.6 [1.8-3.8] |