Table 3. Multivariable model of smoking status and LTBI in all subjects.
| Factor | Odds Ratio | 95% Confidence Interval |
| Smoking history | ||
| Non-smoker | referent | |
| Former smoker | 1.76 | 0.82–3.75 |
| Current smoker | 1.76 | 1.06–2.94 |
| Age (years) | 1.02 | 1.01–1.03 |
| Sex | ||
| Female | referent | |
| Male | 1.78 | 1.19–2.66 |
| Birthplace | ||
| U.S. | referent | |
| Foreign | 6.23 | 3.60–10.78 |
| Poverty | ||
| Poverty income index <1 | referent | |
| Poverty income index >1 | 1.32 | 0.81–2.16 |
| History of TB exposure | 4.41 | 1.87–10.37 |
| BCG vaccination | 1.46 | 0.84–2.52 |
| Education | ||
| Less than high school | referent | |
| High School | 0.77 | 0.44–1.35 |
| More than high school | 0.88 | 0.52–1.50 |
| Race/ethnicity | ||
| White | referent | |
| Black | 5.26 | 2.71–10.21 |
| Mexican-American | 2.89 | 1.19–7.05 |
| Other race/ethnicity | 2.96 | 1.18–7.39 |