TABLE 4.
MULTIVARIATE LOGISTIC REGRESSION ANALYSIS FOR ASSOCIATION BETWEEN POSITIVE IFN-γ RELEASE ASSAY OR TUBERCULIN SKIN TEST RESULT GREATER THAN 10 MILLIMETERS, AS OUTCOME VARIABLE AND PREDICTOR VARIABLES OF AGE, SEX, AND BACILLUS CALMETTE-GUÉRIN VACCINATION STATUS, ADJUSTING FOR STUDY SITE
| Predictor Variable | Descriptor | Outcome Variable (Positive Result) | OR | P Value (95% CI) |
| Age | Continuous | TST | 1.09* | <0.001 (1.06–1.13) |
| QFT-GIT | 1.08* | <0.001 (1.05–1.12) | ||
| T-SPOT.TB | 1.14* | <0.001 (1.08–1.20) | ||
| >2 yr | TST | 2.75 | <0.001 (1.74–4.36) | |
| QFT-GIT | 1.72 | 0.04 (1.03–2.85) | ||
| T-SPOT.TB | 1.77 | 0.16 (0.80–3.96) | ||
| >5 yr | TST | 2.47 | <0.001 (1.82–3.34) | |
| QFT-GIT | 1.91 | <0.001 (1.35–2.70) | ||
| T-SPOT.TB | 2.27 | 0.003 (1.33–3.87) | ||
| BCG | Vaccinated | TST | 3.22 | <0.001 (2.41–4.32) |
| QFT-GIT | 0.41 | <0.001 (0.30–0.55) | ||
| T-SPOT.TB | 0.41 | <0.001 (0.25–0.66) | ||
| Sex | Male | TST | 1.04 | 0.75 (0.81–1.35) |
| QFT-GIT | 1.49 | 0.004 (1.14–1.96) | ||
| T-SPOT.TB | 1.13 | 0.60 (0.72–1.76) |
Definition of abbreviations: BCG = bacillus Calmette-Guérin; CI = confidence interval; OR = odds ratio; QFT-GIT = QuantiFERON-TB Gold In-Tube; TST = tuberculin skin test.
*
OR per year of increasing age.