Table 2. Factors associated with QFT-GIT test positivity among those tested at BCHD.
| Characteristic | Referral for LTBI | OR | AOR | ||
| N | QFT-GIT positive(%) | ||||
| QFT-GIT performed by BCHD | 375 * | ||||
| Interpretable QFT-GIT result available | 363* | 185 (51%) | |||
| Gender | Female | 166 | 81 (49%) | REF | REF |
| Male | 197 | 104 (53%) | 1.2(.78–1.8) | 1.2(0.79–2.0) | |
| Age | 0-2 | 0 | – | – | – |
| 2-12 | 3 | 1 (33%) | 0.46 (0.03–5.2) | 0.11(0.01–1.5) | |
| 13-17 | 23 | 11 (48%) | 0.83(.33–2.1) | 0.39(0.14–1.2) | |
| 18-50 | 251 | 128 (51%) | 0.94(.58–1.5) | 0.59(0.32–1.1) | |
| >50 | 86 | 45 (52%) | REF | REF | |
| Birthplace | Not Foreign-born | 107 | 39 (36%) | REF | REF |
| Foreign-born | 256 | 146(57%) | 2.3 (1.4–3.7) ° | 3.3(1.7–6.2)° | |
| Ethnicity | White | 18 | 7 (39%) | REF | REF |
| ° | Asian/Pacific Island | 123 | 70 (56%) | 2.1 (0.75–5.7) | 1.2(0.37–3.9) |
| ° | Black | 150 | 77(51%) | 1.6 (0.61–4.5) | 1.3(0.45–4.0) |
| ° | Latino | 56 | 26(46%) | 1.4(0.47–4.0) | 0.73(0.21–2.5) |
| ° | Other/Unavailable | 16 | 5(31%) | 0.7(0.17–3.0) | 0.73(0.16–3.3) |
| HIV | Positive | 9 | 1(11%) | .011 (0.01–0.92) °° | 0.17(0.02–1.77) |
| ° | Negative | 295 | 154 (52%) | REF | REF |
| Unknown | 59 | 30 (51%) | 0.94 (.54–1.7) | 1.6(0.80–3.1) | |
| Referral Source: | Drug Treatment Programs | 44 | 14 (32%) | 0.70(0.3–1.6) | † |
| ° | Refugee Services | 144 | 92 (64%) | 2.7 (1.5–4.9) †† | |
| B-Waiver | 34 | 16 (47%) | 1.4 (0.58–3.1) | ||
| Health Fairs | 18 | 8 (44%) | 1.2(0.42–3.5) | ||
| ° | Immigration/Civil Surgeons | 6 | 3 (50%) | 1.5(0.28–8.1) | |
| ° | HIV | 8 | 1(13%) | 0.22 (0.02–1.9) | |
| ° | Local Health Departments | 35 | 22(63%) | 2.6 (1.1–6.0) †† | |
| Dept of Corrections | 1 | 0 (0%) | – | ||
| Occupational Health | 4 | 3 (75) | 4.6 (0.45–46) | ||
| Obstetricians | 6 | 1 (16%) | 0.3 (0.03–2.8) | ||
| Primary Care Providers/Other | 63 | 25 (40%) | REF | ||
| TST Induration | 0–10mm | 3(38%) | REF | REF | |
| 10–15mm | 184 | 76(41%) | 1.2 (0.27–5.1) | 0.99(0.18–5.5) | |
| 15–20mm | 95 | 59(62%) | 2.7 (0.6–12) | 2.4(0.41–13.9) | |
| >20mm | 59 | 40(68%) | 3.5(0.8–16) | 2.8(0.47–16.7) | |
Only individuals with QFT-GIT performed by BCHD are included. 11 individuals had blood drawn for QFT-GIT but did not have interpretable results due to insufficient blood volume during venipuncture, sample transportation issues, or processing error. There was 1 indeterminate result.
°p<0.001 for both univariate and multivariate analysis comparing foreign-born to US born individuals.
°° P = 0.042 comparing HIV positive to HIV negative individuals.
Referral source was omitted from multivariate regression model due to collinearity with birth country.
p = 0.001 comparing those referred from Refugee health services to those referred from primary care providers/other; p = 0.03 comparing those referred from local health departments to those referred from primary care providers/other.