TABLE 1.
Demographics and multivariate logistic regression for concordance between the TST and IFN-γ assay (n = 409)
| Variable | n (%) | TST/-IFN-γ assay concordancea
|
|
|---|---|---|---|
| Crude OR (95% CI) | Adjusted OR (95% CI) | ||
| Age | 409 (100) | 0.98 (0.95-1.01) | 0.97 (0.94-1.01) |
| Gender | |||
| Female | 114 (27.9) | 1.00 | 1.00 |
| Male | 295 (72.1) | 0.93 (0.45-1.89) | 0.85 (0.38-1.87) |
| Ethnicity | |||
| Caucasian | 145 (35.5) | 1.00 | 1.00 |
| African-American | 173 (42.3) | 0.30 (0.12-0.75)* | 0.29 (0.11-0.77)* |
| Hispanic | 91 (22.2) | 0.26 (0.10-0.71)* | 0.34 (0.10-1.22) |
| Birth country | |||
| United States | 370 (90.5) | 1.00 | 1.00 |
| Other | 39 (9.5) | 0.38 (0.16-0.89)* | 0.23 (0.06-0.80)* |
| Prior incarceration | |||
| No | 65 (15.9) | 1.00 | 1.00 |
| Yes | 344 (84.1) | 0.12 (0.02-0.88)* | 0.06 (0.01-0.50)* |
| Known TB contactb | |||
| No | 358 (87.5) | 1.00 | 1.00 |
| Yes | 51 (12.5) | 0.83 (0.33-2.09) | 0.63 (0.23-1.77) |
| Lived in shelterc | |||
| No | 326 (79.7) | 1.00 | 1.00 |
| Yes | 83 (20.3) | 1.94 (0.74-5.10) | 2.38 (0.84-6.77) |
| Intravenous drug use | |||
| No | 356 (87.0) | 1.00 | 1.00 |
| Yes | 53 (13.0) | 1.08 (0.40-2.89) | 0.90 (0.30-2.71) |
a
*, P < 0.05.
b
Known history of contact with a TB case.
c
History of living in nursing homes, homeless shelters, drug rehabilitation centers, or “bunk houses.”