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Table 3 Increasing probability of bacteriological confirmation of tuberculosis as primary care physicians' strength of suspicion increased.

From: Diagnostic accuracy of an integrated respiratory guideline in identifying patients with respiratory symptoms requiring screening for pulmonary tuberculosis: a cross-sectional study

Strength of suspicion Positive predictive value n/N (%)
1 (weakest suspicion) 1/29 (3)
2 3/76 (4)
3 6/85 (7)
4 7/65 (11)
5 (strongest suspicion) 23/87 (26)
All tuberculosis suspects 40/342 (12)
  1. Non-parametric test for trend: P < 0.01