Skip to main content

Table 1 Analysis of the index dip-test ability to distinguish respiratory infection shows 100% sensitivity (95% CI 81.4–100%), 72.22% specificity (95% CI 46.52–90.31%), 100% negative predictive value and 78.26% (95% CI 63.09–88.35%)

From: One-minute through test to distinguish lower respiratory infection by analysis of sputum; exploring the mechanisms

Index test Present n Absent n Total
Respiratory infection
 Positive True positive a = 18 False positive c = 5 a + c = 23
 Negative False negative b = 0 True negative d = 13 b + d = 13
Total   18   18 36
  1. Diseases prevalence 50%