Table 1.
Demographic characteristics of household child contacts of individuals with tuberculosis
| Household child contacts of individuals with tuberculosis (n=1718) | |
|---|---|
| Household contact characteristics | |
|
| |
| Age (years) | 7 (3–11) |
| Age group (years) | |
| 0–4 | 578 (34%) |
| 5–15 | 1140 (66%) |
| Sex | |
| Male | 582 (34%) |
| Female | 1136 (66%) |
| BCG vaccinated* | 1325 (77%) |
| Exposure to another individual with tuberculosis† | 161 (9%) |
| Relation to index case | |
| Child | 1028 (60%) |
| Sibling | 104 (6%) |
| Other‡ | 571 (33%) |
| Missing information | 15 (<1%) |
| Past tuberculosis | 11 (<1%) |
| Closeness to index case | |
| Share bed | 192 (11%) |
| Share room, not bed | 896 (52%) |
| Different room | 610 (36%) |
| Missing information | 20 (1%) |
|
| |
| Index case characteristics§ | |
|
| |
| Age (years) | 30 (25–37) |
| Age group (years) | |
| 18–29 | 789 (46%) |
| 30–39 | 589 (34%) |
| 40–49 | 238 (14%) |
| ≥50 | 75 (4%) |
| Missing information | 27 (2%) |
| Sex | |
| Male | 795 (47%) |
| Female | 923 (53%) |
| Cigarette smoker | 302 (18%) |
| Cavitary disease¶ | 992 (58%) |
| Cough duration (days) | 90 (45–120) |
| HIV-seropositive | 754 (44%) |
|
| |
| Household characteristics | |
|
| |
| Housing type | |
| Multifamily household | 834 (49%) |
| Single family household | 877 (51%) |
| Missing data | 7 (<1%) |
| Charcoal or fire smoke exposure | |
| Inside household | 372 (22%) |
| Outside household | 1262 (74%) |
| None | 57 (3%) |
| Missing data | 27 (2%) |
| Ventilation (≤1 window per room)‖ | 1532 (89%) |
| Density, individuals per home (IQR) | 6 (4–8) |
| Household size (individuals per home) | |
| 1–5 | 717 (42%) |
| 6–10 | 818 (48%) |
| >10 | 183 (11%) |
Data are median (IQR) or n (%). Percentages refer to within-characteristic column totals among household contacts of index patients with tuberculosis. Percentages might not total 100% because within-column percentages were rounded to the nearest integer.
Assessed through BCG scar and verified by medical records when available.
Refers to exposure to another individual with tuberculosis other than the index case in the previous 12 months before the baseline visit.
Includes other relatives, such as grandparents, grandchildren, aunts, uncles, and cousins. Also includes non-relatives living in the household.
Number and percentage of household contacts exposed to the index case characteristic in the left-hand column.
Radiographic imaging results were graded by an experienced clinician using the 1961 National Tuberculosis Association classification system.34
Windows must be to the outside.