Prevalence of LTBI, positive TST and positive IGRA tests by age group
| Age group (years) | LTBI* | Positive TST | Positive IGRA | ||||||
| n | % | 95% CI | n | % | 95% CI | n | % | 95% CI | |
| <2 | 11 | 45.5 | 16.7 to 76.6 | 20 | 45.0 | 25.8 to 65.8 | 12 | 41.7 | 19.3 to 68.0 |
| 2–4 | 23 | 47.8 | 26.8 to 69.4 | 33 | 42.4 | 27.2 to 59.2 | 20 | 55.0 | 34.2 to 74.2 |
| ≤5 | 34 | 47.1 | 29.8 to 64.9 | 53 | 43.4 | 31.0 to 56.7 | 32 | 50.0 | 33.6 to 66.4 |
| >5 | 75 | 64.0 | 52.1 to 74.8 | 79 | 59.5 | 48.5 to 65.6 | 78 | 52.6 | 41.6 to 62.3 |
| Overall | 109 | 58.7 | 48.9 to 68.1 | 132 | 53.0 | 44.6 to 61.3 | 110 | 51.8 | 42.6 to 60.9 |
*Only children with valid results for TST and IGRA were included (indeterminate results for IGRA have been excluded).
IGRA, interferon-gamma release assay; LTBI, latent TB infection; TB, tuberculosis; TST, tuberculin skin test