Table 2.
Estimates of % of Tuberculosis Transmission, Transmission Risk, and Relative Transmission Risk by Test Status of Interest
| Minimum % of TB Transmissiona | Minimum Transmission Risk%b |
Minimum Relative Transmission Riskc | |
|---|---|---|---|
| 95% CI | 95% CI | 95% CI | |
| n/n | n/n | n/n | |
| NAAT-negative | 1.8 | 5.1 | 0.14 |
| (0.0, 4.3) | (0.0, 11.4) | (0.00, 0.35) | |
| 2/113 | 2/39 | 5.1/35.4 | |
| Smear-negative | 9.2 | 11.2 | 0.23 |
| (5.7, 14.0) | (7.2, 15.3) | (0.15, 0.36) | |
| 18/196 | 18/161 | 11.2/48.5 | |
| NAAT-positive/smear-positive | 46.9 | 20.7 | Not applicable |
| (41.3, 61.2) | (17.2, 26.8) | ||
| 52/111 | 52/251 | ||
| NAAT-positive/smear-negative/ | 5.4 | 11.5 | Not applicable |
| (0.9, 7.0) | (0.3, 18.4) | ||
| 6/111 | 6/52 | ||
| NAAT-negative/smear-negative | 1.8 | 6.5 | Not applicable |
| (0, 4.3) | (0, 14.3) | ||
| 2/111 | 2/31 |
Abbreviations: CI, confidence interval; NAAT, nucleic acid amplification test; TB, tuberculosis.
aDefined as [(minimum number of transmission events attributed to patients with the test status of interest)/(total number of secondary cases)] × 100.
bDefined as [(minimum number of transmission events attributed to patients with the test status of interest)/(total number of cases with the test status of interest)] × 100.
cDefined as (minimum transmission risk associated with negative test status for the test of interest)/(transmission risk associated with positive test status for the test of interest).