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Table 1 Results of CXR examination stratified by culture in TB suspects excluding those who were smear-positive on ZN microscopy. (N = 657).

From: The role and performance of chest X-ray for the diagnosis of tuberculosis: A cost-effectiveness analysis in Nairobi, Kenya

  Total (N = 657) Culture positive (N = 226) Culture negative (N = 431)
a) Highly consistent for TB 152 (100%) 109 (72%) 43 (28%)
b) Consistent for TB 171 (100%) 71 (42%) 100 (58%)
c) Pathology, but no TB 22 (100%) 6 (27%) 16 (73%)
d) No pathology 312 (100%) 40 (13%) 272 (87%)
" TB"*: (a+b) 323 (100%) 180 (56%) 143 (44%)
" no-TB": (c+d) 334 (100%) 46 (14%) 288 (86%)
  1. * Smear-negative pulmonary TB