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Table 1 The four outcomes can be formulated in a 2 × 2 contingency table; sensitivity was calculated as 71% and specificity as 96%

From: The role of the calcofluor white staining in the diagnosis of Acanthamoeba keratitis

Total population:

35

CFW result

Total

Accuracy

Positive

Negative

Actual condition

Positive

True positive:

5

False negative:

2

 = 7

Sensitivity: 71%

Negative

False positive:

1

True negative:

27

 = 28

Specificity: 96%