Table 3. Factors associated with abnormal CXR and TB disease among the household contacts who had their CXR done (N = 544) in Chennai, India.
| Characteristic | Total N | CXR Abnormal n (%) | Unadjusted OR (95% CI, p value) | Adjusted OR (95% CI, p value) | TB disease n (%) | Unadjusted OR (95% CI, p value) | Adjusted O.R. (95% CI, p value) | ||
|---|---|---|---|---|---|---|---|---|---|
| Age in years | |||||||||
| 0–14 | 194 | 10 | 5 | 1.0 (Ref) | 1.0 (Ref) | 3 | 2 | 1.0 (Ref) | 1.0 (Ref) |
| 15–44 | 273 | 38 | 14 | 3.0(1.4–6.1, 0.003) | 2.3(0.9–6.0, 0.09) | 23 | 8 | 5.9 (1.7–19.8, 0.004) | 7.3(1.4–36.7, 0.02) |
| >44 | 77 | 23 | 30 | 7.8(3.5–17.5, <0.001) | 5.5(1.6–19.0, 0.01) | 3 | 4 | 2.6(0.5–13.1, 0.25) | 2.2(0.2–21.4, 0.5) |
| Sex | |||||||||
| Male | 220 | 38 | 17 | 1.8(1.1–3.0, 0.02) | 2.2(1.2–3.9, 0.01) | 17 | 8 | 2.2(1.1–4.6, 0.04) | 2.0(0.8–4.9, 0.14) |
| Female | 324 | 33 | 10 | 1.0 (Ref) | 1.0 (Ref) | 12 | 4 | 1.0 (Ref) | 1.0 (Ref) |
| Relationship to the index case* | |||||||||
| Spouse | 155 | 17 | 11 | 2.3 (1.1–4.9, 0.04) | 1.4 (0.5–3.9. 0.47) | 5 | 3 | 1.5(0.4–5.4, 0.5) | 0.7(0.2–3.0, 0.67) |
| Parent | 64 | 18 | 28 | 7.3 (3.3–16.1, <0.001) | 2.7 (0.8–9.2, 0.12) | 4 | 6 | 3.1(0.8–11.8, 0.1) | 3.2(0.5–19.9, 0.21) |
| Child | 235 | 12 | 5 | 1.0 (Ref) | 1.0 (Ref) | 5 | 2 | 1.0 (Ref) | 1.0 (Ref) |
| Sibling | 47 | 11 | 23 | 5.7(2.3–13.8, 0.001) | 3.4 (1.2–9.7, 0.02) | 6 | 13 | 6.7(2.0–23.1, 0.002) | 2.6(0.7–10.0, 0.16) |
| Others** | 37 | 8 | 22 | 5.1(1.9–13.6, 0.001) | 3.7 (1.3–10.8, 0.02) | 4 | 11 | 5.6(1.4–21.8, 0.01) | 4.1(1.0–17.2, 0.06) |
* Details missing in 6 contacts
**Included other second degree relatives (Grandchild, cousin, uncle).