Yield of screening and incidence of all tuberculosis(TB) cases during follow-up period (6–29 months) for individuals with abnormal chest radiography at entry#
| Follow-up person-yrs | Screenings in rounds 2–5 n | TB patients n | Yield¶ (95% CI) | Incidence+ (95% CI) | |||
| Detected | Found passively | Total | |||||
| Incidence in country of origin§ | |||||||
| <100 | 1236 | 730 | 3 | 1 | 4 | 411 (85–1201) | 324 (88–828) |
| 100–200 | 1328 | 791 | 9 | 3 | 11 | 1138 (520–2160) | 828 (414–1482) |
| >200 | 677 | 363 | 5 | 2 | 7 | 1377 (447–3215) | 1034 (416–2130) |
| Total | 3241 | 1884 | 17 | 6 | 23 | 902 (526–1445) | 710 (450–1064) |
CI: confidence interval. #: n = 1,412; ¶: per 100,000 screenings in rounds 2–5; +: defined as number of cases detected through screening plus number of cases detected passively, per 100,000 person-yrs follow-up; §: estimated incidence of total TB per 100,000 individuals in 2002 according to the World Health Organization.