PubMed Central, : RMMJ Rambam Maimonides Medical Journal Rambam Health Care Campus 2020 July; 11(3): e0020. ISSN: 2076-9172Published online 2020 July 31. doi: 10.5041/RMMJ.10412.

Table 4.

Example for PPV, NPV, PSI, and NND as a Function of the Prevalence with 90% Sensitivity and Specificity.^*

Prevalence (%)	Estimated Prevalence	PPV (%)	FPF (%)	NPV (%)	FNF (%)	PSI (%)	NND=1/PSI
1	Iceland, Israel: Asymptomatic	8.3	91.7	99.9	0.1	8.2	12.2
5	Spain, Israel	33.1	67.9	99.4	0.6	31.6	3.2
10		50.0	50.0	98.8	1.2	48.8	2.1
30	New York City	79.4	20.6	95.5	4.5	74.9	1.3
50	Almost Herd Immunity	90.0	10.0	90.0	10.0	80.0	1.3
70	Herd Immunity	95.5	4.5	79.4	20.6	74.9	1.3
90	Most Infected	98.8	1.2	50.0	50.0	48.8	2.1

^*This is an illustrative table. There are no reliable estimates of disease prevalence in various countries.

RMMJ Rambam Maimonides Medical Journal Rambam Health Care Campus 2020 July; 11(3): e0020. ISSN: 2076-9172

Published online 2020 July 31. doi: 10.5041/RMMJ.10412