Risk for tuberculin skin testing positivity (TST+) according to Italian area of birth
| Area | TST+ | OR (95% CI) | p-value | TB incidence# |
| Italy | ||||
| North | 1/21 (4.76) | 0.24 (0.03–1.89) | 0.17 | 69.93 |
| Centre | 4/32 (12.50) | 0.69 (0.22–2.14) | 0.53 | 22.05 |
| South | 29/171 (16.96) | 1 | 32.04 | |
| Main Islands¶ | 6/103 (5.83) | 0.30 (0.12–0.75) | 0.011 | 10.00 |
Data are presented as n/N (%), unless otherwise stated. OR: odds ratio; CI: confidence interval; TB: tuberculosis. #: per 100,000, based on TB cases notified in 2002 among general population; ¶: Sicily, Sardinia.