Characteristics of paediatric contacts of patients with drug-resistant TB (n=150)
| Characteristics | n (%) |
| Age (median in years, IQR) | 6 (3–10) |
| Age groups (years) | |
| <2 | 24 (16.0) |
| 2–4 | 36 (24.0) |
| >5 | 90 (60.0) |
| Gender | |
| Male | 70 (46.7) |
| Female | 80 (53.3) |
| Nutrition status | |
| Adequate | 144 (96.0) |
| Stunting* | 5 (3.3) |
| Wasting† | 1 (0.7) |
| Previous treatment for active TB received | 0 (0.0) |
| Previous isoniazid preventive treatment received | 7 (4.7) |
| BCG-vaccinated | 149 (99.3) |
| BCG scar present | 76 (51.0) |
| Comorbidities‡ | 4 (2.7) |
| Living conditions (median, IQR) | |
| Number of people living in the same house | 5 (4–7) |
| Number of rooms in the house | 3 (2–4) |
| Number of bedrooms in the house | 2 (2–3) |
| Exposure to smoke | |
| Child who smokes cigarettes | 1 (0.7) |
| Child exposed to cigarette smoke | 114 (76.0) |
| Child exposed to other types of household smoke (eg, wood burner) | 71 (47.3) |
| Sleeps in the same house as index case | 118 (78.7) |
| Sleeps in the same room as index case | 41 (34.8) |
| Daily contact with the index case | 123 (82.0) |
| Number of hours of exposure per week (median, IQR) | 42 (14–84) |
| Sibling or infant of the index case | 84 (56.0) |
| Known exposure to an additional patient with TB | 5 (3.3) |
| Place of residence | |
| Yerevan city | 46 (30.7) |
| Other regions | 104 (69.3) |
*Stunting: height for age <–2 SD of the WHO Child Growth Standards median.
†Wasting: weight for height <–2 SD of the WHO Child Growth Standards median for children up to 5 years.
‡Comorbidities: one vesicoureteral reflux, one aortic valve stenosis, one Down’s syndrome and one developmental delay.
BCG, bacille Clmette-Guerin; IQR, interquartile range; TB, tuberculosis.