Table 3. Reasons IGRA not processed or 3HP not offered to participants in the Preventing Tuberculosis Overseas Pilot Study of US immigrant visa applicants, Vietnam, 2018–2019*.
| Reason | No. (%) participants |
|---|---|
| IGRA not processed for participants who consented to be tested | 162 (100) |
| Previous TB or abnormality on chest radiograph | 119 (73) |
| Hepatitis B | 25 (15) |
| History of extrapulmonary TB | 3 (2) |
| Previous treatment | 1 (1) |
| Breastfeeding | 1 (1) |
| Applying for visa type not included in study | 2 (1) |
| Recent receipt of live virus vaccine | 1 (1) |
| Unknown; may have withdrawn consent |
10 (7) |
| 3HP not offered to IGRA-positive participants | 32 (100) |
| Hepatitis B | 18 (56) |
| Hepatitis C | 5 (16) |
| Previous TB or abnormality on chest radiograph | 1 (3) |
| Liver disease | 1 (3) |
| Planning to get pregnant in next 4 mo | 1 (3) |
| Substance addiction | 1 (3) |
| Previous LTBI treatment | 3 (9) |
| Unknown | 2 (6) |
*IGRA, interferon-γ release assay; LTBI, latent tuberculosis infection; TB, tuberculosis; 3HP, 3-mo regimen of isoniazid and rifapentine.