Table 5 Comparison of yield of household contact screening between two screening approaches; September 2020 - December 2022
Household contacts TB screening | Screening (both groups) n (%) | Study site I (repeat screening) n (%) | Study site II (single baseline screening) n (%) |
|---|---|---|---|
Index TB cases screened | 387 | 193 (49.9) | 194 (50.1) |
Household contacts screened at baseline | 1,276 | 753 (59.1) | 523 (40.9) |
Contacts screened during repeat screening | 585 | 585 | NA |
Presumptive TB cases at baseline | 163 (12.7) | 98 (13) | 65 (12) |
Presumptive TB cases at repeat screening | 55 (9.4) | 55 (9.4) | NA |
TB yield during baseline screening | 17 (1.3) | 11 (1.5) | 6 (1.1) |
TB yield during repeat screening | 6 (1) | 6 (1) | NA |
TB yield (total) | 23 (1.8) | 17 (2.2) | 6 (1.1) |
NNS value for presumptive TB cases | 6 | 6 | 12 |
NNS value for TB cases | 55 | 44 | 87 |
NNT value for TB cases | 9 | 9 | 11 |