Table 4.
Multivariate Analysis, using Conditional Logistic Regression to evaluate Risk Factors for a Positive Diagnostic Test for Latent Tuberculosis Infection
| Risk factors for positive TST | Odds Ratio | 95% Confidence Interval |
|---|---|---|
| Age < 32 years | 0.98 | 0.36-2.62 |
| Male Gender | 1.33 | 0.79-2.22 |
| HIV negative* Age < 32 years Age ≥ 32 years |
1.86 3.67 |
1.06-2.67 1.60-8.39 |
| Risk factors for positive QFT | Odds Ratio | 95% Confidence Interval |
| Age < 32 years | 0.56 | 0.24-1.36 |
| Male Gender | 0.92 | 0.55-1.53 |
| HIV negative | 2.22 | 1.42-3.46 |
| Risk factors for positive TSPOT | Prevalence Ratio | 95% Confidence Interval |
| Age < 32 years | 0.98 | 0.42-2.28 |
| Male Gender | 1.59 | 0.92-2.76 |
| HIV negative | 1.79 | 1.16-2.77 |
*Interaction between age and HIV
TST: Tuberculin Skin Test
QFT: Quantiferon-TB Gold In Tube Test
TSPOT: TSPOT.TB Test
HIV: Human Immunodeficiency Virus