Table 1.

Statistical significance of near-patient and corresponding laboratory test results, for stored serum and whole blood samples

	Laboratory testing
	Stored serum samples (Phase 1)			Whole blood samples (Phase 2)
	ELISA tTGA (n=70)	IgA tTGA (n=50)	EMA (n=50)	ELISA tTG
				Both sites (n=80)	New Cross Hospital (n=50)
Sensitivity (%)	93.5	92.6	93.5	77.8	75.0
Specificity (%)	94.9	95.7	94.7	100	100
PPV (%)	93.5	96.2	96.7	100	100
NPV (%)	94.9	91.7	90	97.3	97.9
p Value	<0.05	<0.05	<0.05	<0.05	<0.01

p Value: statistically significant if p<0.05.

EMA, endomysial antibody; IgA tTG, tissue transglutaminase antibody; NPV, negative predictive value; PPV, positive predictive value.