Table 1. Descriptive characteristics of socially marginalized immigrants investigated, Italy*.
| Variable, group | No. (%) | |
|---|---|---|
| TB incidence rate in the country of origin of the immigrants, (x 105 person-years) | ||
| <25 | 679 (2.5) | |
| 25–49 | 3,500 (12.8) | |
| 50–99 | 1,668 (6.1) | |
| 100–299 | 20,050 (73.3) | |
| >300 | 1,461 (5.3) | |
| Age at test | ||
| <20 | 2,500 (9.1) | |
| 20–29 | 10,705 (39.1) | |
| 30–39 | 8,659 (31.7) | |
| >40 | 4,938 (18.0) | |
| Missing | 556 (2.0) | |
| Age at immigration | ||
| <20 | 3,416 (12.5) | |
| 20–29 | 12,415 (45.4) | |
| 30–39 | 6,318 (23.1) | |
| >40 | 4,778 (17.5) | |
| Missing | 431 (1.6) | |
| Sex | ||
| F | 11,116 (40.6) | |
| M | 16,242 (59.4) | |
| Year of immigration | ||
| <1990 | 1,978 (7.2) | |
| 1990–1994 | 5,121 (18.7) | |
| 1995–1999 | 8,206 (30) | |
| 2000–2004 | 8,911 (32.6) | |
| 2005–2010 | 2,092 (7.6) | |
| Year of first testing | ||
| 1991–1994 | 2,040 (7.5) | |
| 1995–1999 | 10,783 (39.4) | |
| 2000–2004 | 11,400 (41.7) | |
| 2005–2010 | 3,055 (11.2) | |
| First TST within | ||
| 2 y | 60.4 (59.8–61) | |
| 5 y | 81.9 (81.4–82.3) | |
| 10 y | 95 (94.8–95.3) | |
*TB, tuberculosis; TST, tuberculin skin test. Given missing data the totals do not always sum up to 100%.