Table 3

False-positive resultsa in settings of varying prevalence and tests of varying specificity
Disease prevalence rate Number of false-positive results
Specificity
90 % 95% 98% 99%
20% 80 40 16 8
40% 60 30 12 6
60% 40 20 8 4
80% 20 10 4 2

a Predicted numbers based on a hypothetical population of 1,000 tested individuals.

Bentley et al.

Bentley et al. BMC Research Notes 2012 5:563   doi:10.1186/1756-0500-5-563

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