Table 2
Estimates of parameters calculated from the LTBR
| Name of variable (units, if applicable) | Index case disease type | Symbol | Value | 95% CIs |
| Number of contacts screened per index case | ETB |
| 2.50 | (2.41 to 2.59) |
| PTB |
| 3.86 | (3.72 to 4.00) | |
| Number of contacts found with TB per index case | ETB |
| 0.0196 | (0.0119 to 0.0273) |
| PTB |
| 0.0938 | (0.0774 to 0.110) | |
| Proportion of contacts with TB that have ETB | ETB |
| 0.486 | (0.329 to 0.643) |
| PTB |
| 0.337 | (0.278 to 0.396) | |
| Number of contacts found with LTBI per index case | ETB |
| 0.119 | (0.104 to 0.134) |
| PTB |
| 0.471 | (0.428 to 0.514) | |
| Proportion of index contact’s with LTBI that are children | ETB |
| 0.206 | Not varied |
| PTB |
| 0.360 | Not varied | |
| Proportion of contacts with LTBI that begin PT, adult contact | ETB |
| 0.611 | (0.510 to 0.712) |
| PTB |
| 0.666 | (0.604 to 0.728) | |
| Proportion of contacts with LTBI that begin PT, child contact | ETB |
| 0.931 | (0.838 to 1.02) |
| PTB |
| 0.969 | (0.922 to 1.02) | |
| Proportion of contacts starting PT that complete PT, adult contact | ETB |
| 0.875 | (0.793 to 0.957) |
| PTB |
| 0.803 | (0.742 to 0.864) | |
| Proportion of contacts starting PT that complete PT, child contact | ETB |
| 0.81 | (0.638 to 0.982) |
| PTB |
| 0.906 | (0.845 to 0.967) | |
| Mean symptomatic period of PTB cases not found through contact tracing (days) | N/A |
| 110 | (103 to 117] |
| Mean symptomatic period of PTB cases found through contact tracing (days) | N/A |
| 76.6 | (58.5 to 94.7) |
| Mean symptomatic period of PTB cases (days) | N/A |
| 109 | (102 to 116) |
| Mean symptomatic period of ETB cases not found through contact tracing (days) | N/A |
| 181 | (166 to 196) |
| Mean symptomatic period of ETB cases found through contact tracing (days) | N/A |
| 152 | (15.0 to 289) |
| Mean symptomatic period of all cases (days) | N/A |
| 147 | (139 to 155) |
All parameters are chosen from a normal distribution.
ETB, non-pulmonary and non-laryngeal TB; LTBI, latent Mycobacterium tuberculosis infection; LTBR, London TB report; PT, preventive therapy; PTB, pulmonary or laryngeal TB.