Table 1 Sensitivities, specificities and likelihood ratios of AFB smear plus Culture and AFB smear plus PCR dot-Blot
From: Cost-effectiveness analysis of PCR for the rapid diagnosis of pulmonary tuberculosis
Laboratory Results and Performance of methodsa | Total number of suspects N = 277 | ||||
|---|---|---|---|---|---|
TB N = 128 | Not-TB N = 149 | ||||
Performance of AFB smear plus Culture | Positive | 111 | 1 | ||
Negative | 17 | 148 | |||
SE | SP | LR+ | LR- | ||
87% | 99% | 89 | 0.13 | ||
Performance of AFB smear plus PCR dot-blot | Positive | 109 | 22 | ||
Negative | 19 | 127 | |||
SE | SP | LR+ | LR- | ||
85% | 85% | 5.31 | 0.18 | ||