Table 3. Baseline characteristics of the household and risk factors for incident TB disease among household contacts of adult pulmonary TB patients in India.
| Household Characteristics | Overall | iTBD | IR/1000 PY (95% CI) | Univariate IRR (95% CI) | p-value | Adjusted IRR (95% CI) (Overall model) | p-value |
|---|---|---|---|---|---|---|---|
| Denominators | 997 | 20 | |||||
| Family size | 5 (4–6) | 5 (4.5–7) | NA | 1.09 (0.94–1.26) | 0.25 | Not included | |
| Family type | Not included | ||||||
| Nuclear | 647 (65%) | 13 (65%) | 12 (7–21) | 1 | |||
| Joint | 350 (35%) | 7 (35%) | 13 (5–26) | 1.02 (0.41–2.56) | >0.95 | ||
| Residing in slum | Not included | ||||||
| Yes | 262 (27%) | 7 (35%) | 18 (7–37) | 1.65(0.66–4.14) | 0.29 | ||
| No | 716 (73%) | 13 (65%) | 11 (6–19) | 1 | |||
| Residence type | |||||||
| Urban | 687 (69%) | 17 (85%) | 16 (9–26) | 2.86 (0.84–9.75) | 0.09 | 5.03 (1.02–24.75) | 0.05 |
| Rural | 310 (31%) | 3 (15%) | 6 (1–16) | 1 | 1 | ||
| Windows (median) | 2 (1–3) | 2 (1–2.5) | NA | 0.85 (0.64–1.12) | 0.25 | Not included | |
| Family income (Rupees) | |||||||
| <10000 | 412 (43%) | 8 (53%) | 12 (5–24) | 1 | 1 | ||
| 10000–30000 | 510 (53%) | 6 (40%) | 7 (3–16) | 0.58 (0.20–1.67) | 0.31 | 0.90 (0.28–2.90) | 0.85 |
| >30000 | 33 (4%) | 1 (7%) | 21 (1–118) | 1.72 (0.22–13.77) | 0.61 | 5.16 (0.39–68.62) | 0.21 |
| Sleep indexa | |||||||
| Different room | 276 (30%) | 3 (15%) | 6 (1–18) | 1 | 1 | ||
| Same room/same bed | 397 (42%) | 10 (50%) | 23 (11–42) | 3.60 (0.99–13.07) | 0.05 | 2.10 (0.38–11.56) | 0.39 |
| same room/different bed | 276 (29%) | 7 (35%) | 11 (5–23) | 1.78 (0.46–6.89) | 0.4 | 0.69 (0.12–3.97) | 0.68 |
TBD = TB disease.
a. Sleep location of adult pulmonary TB index patient.