Table 2.

Calculations of Statistical Indicators and their Interpretation.

Statistical Indicator	Value	Interpretation
Sensitivity	83.3%	Sensitivity is low which means that a positive test rarely occurs in those with the COVID virus
Specificity	99.2%	Specificity is high meaning that a negative test often occurs in those without COVID-19
Positive predictive value (PPV)	52%	PPV is very low meaning false positives are common
Negative predictive value (NPV)	99.8%	NPV is very high meaning that the test is useful for screening
Prevalence	0.005	The prevalence of COVID is very low (about 0.5%), hence prone to false positives
Accuracy	99.1%	Proportion correctly classified