Table 2 Performance of smear, culture and Detect-TB compared to the gold standard
N = 294 | |||
|---|---|---|---|
TB N = 55 | Non-TB N = 239 | ||
Smear | Positive | 26 | 0 |
Negative | 29 | 239 | |
SE (%) | SP (%) | ||
47 | 100 | ||
(CI 95%: 41%–52%) | (CI 95%: 99%–100%) | ||
Culture | Positive | 51 | 0 |
Negative | 4 | 239 | |
SE (%) | SP (%) | ||
93 | 100 | ||
(CI 95%: 89%–96%) | (CI 95%: 99%–100%) | ||
Detect-TB | Positive | 41 | 12 |
Negative | 14 | 227 | |
SE (%) | SP (%) | ||
74 | 95 | ||
(CI 95%: 68%–79%) | (CI 95%: 92%–97%) | ||
Smear plus culture | |||
SE (%) | SP (%) | ||
96 | 100 | ||
(CI 95%: 93%–98%) | (CI 95%: 99%–100%) | ||
Smear plus Detect-TB | |||
SE (%) | SP (%) | ||
86 | 95 | ||
(CI 95%: 81%–90%) | (CI 95%: 92%–97%) | ||