Table 3.
Factors associated with LTBI in contacts of pulmonary TB cases in Catalonia (Spain) (1 January 2019 to 31 May 2021)
| Variable | Latent tuberculosis infection | Crude odds ratio | 95% CI | P-value |
|---|---|---|---|---|
| % (n/N) | ||||
| Total | 26.2 (1493/5688) | |||
| Period | ||||
| Pandemic | 29.2 (403/1381) | 1.2 | 1.1–1.4 | 0.002 |
| Pre-pandemic | 25.3 (1090/4307) | Reference | ||
| Sex | ||||
| Male | 29.4 (855/2908) | 1.4 | 1.2–1.6 | 0.002 |
| Female | 23.0 (638/2778) | 1.0 | ||
| Age group (years) | ||||
| 0–17 | 19.6 (279/1425) | Reference | ||
| 18–29 | 21.6 (230/1063) | 1.2 | 0.9–1.5 | 0.168 |
| 30–44 | 24.2 (369/1523) | 1.4 | 1.1–1.7 | 0.003 |
| 45–64 | 48.9 (522/1067) | 2.5 | 2.1–3.1 | <0.001 |
| ≥65 | 36.2 (93/257) | 2.5 | 1.8–3.5 | <0.001 |
| Immigrant | ||||
| Yes | 36.2 (853/2328) | 2.5 | 2.2–2.8 | <0.001 |
| No | 19.0 (640/3360) | Reference | ||
| Household contact | ||||
| Yes | 38.9 (748/1923) | 2.6 | 2.3–2.9 | <0.001 |
| No | 18.8 (745/3765) | Reference | ||
| Smoking habit | ||||
| Smoker | 57.1 (408/715) | 4.9 | 4.1–5.7 | <0.001 |
| Ex-smoker | 42.0 (37/88) | 2.7 | 1.7–4.1 | |
| No/unknown | 21.4 (1048/4885) | Reference | ||
| Alcohol | ||||
| Yes | 46.0 (58/126) | 2.4 | 1.7–3.5 | <0.001 |
| No/unknown | 25.8 (1435/5562) | Reference |
Note: 95% CI, confidence interval.