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Table 2 Performance of smear, culture and Detect-TB compared to the gold standard

From: Smear plus Detect-TB for a sensitive diagnosis of pulmonary tuberculosis: a cost-effectiveness analysis in an incarcerated population

  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%)