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Table 4 Statistical performance of the screening methods

From: Usefulness of combined screening methods for rapid detection of falsified and/or substandard medicines in the absence of a confirmatory method

 

Passed samples

Failed samples

False negative

True Positive

False positive

True negative

Sensitivity

95% CI

Specificity

95% CI

HPLC (n = 25)

19.00

6.00

Minilab (n = 25)

22.00

3.00

3.00

3.00

0.00

19.00

0.50

0.57

1.00

0.00

Colorimetric (n = 25)

19.00

6.00

1.00

5.00

1.00

18.00

0.83

0.33

0.95

0.10

CoDI (n = 5)

5.00

3.00

1.00

3.00

0.00

4.00

0.75

0.49

1.00

0.00

Combined screening methods (n = 25)

19.00

6.00

1.00

5.00

1.00

18.00

0.83

0.33

0.95

0.10