TABLE 4.

Positive and negative predictive values for the seven serological tests at different prevalences of tuberculosis

Test	Prevalence of 0.01% (general New Zealand population)a		Prevalence of 0.1% (group with highest prevalence in New Zealand, predominantly Southeast Asian)a		Prevalence of 76% (tuberculosis ward, Green Lane Hospital)b
	PPVc (%)	NPVd (%)	PPV (%)	NPV (%)	PPV (%)	NPV (%)
ICT Tuberculosis	0.1	99.9	1	99.9	97	34
RAPID TEST TB	0.02	99.9	0.2	99.9	86	27
TUBERCULOSIS IgA EIA	0.08	99.9	0.8	99.9	96	41
PATHOZYME-TB complex	0.05	99.9	0.5	99.9	94	27
PATHOZYME-MYCO IgG	0.05	99.9	0.5	99.9	94	38
PATHOZYME-MYCO IgA	0.03	99.9	0.3	99.9	90	31
PATHOZYME-MYCO IgM	0.009	99.9	0.09	99.9	74	24

^aData are from reference 8. 

^bDatum is from reference 9. 

^cPPV, positive predictive value. 

^dNPV, negative predictive value.