Table 2

 Onsite rapid test for IgA antibodies to transglutaminase compared with final diagnosis of coeliac disease on the basis of laboratory antibody positivity (IgA and IgG) and biopsy of small intestine

Biopsy result (all patients positive for laboratory antibody tests)Rapid test result
PositiveNegativeTotal
Villous atrophy indicative of coeliac disease257*32
Normal villous structure066
Biopsy not performed3 (refused biopsy)26352638
Total2826482676

Sensitivity 78.1% (95% confidence interval 70.0% to 89.3%); specificity 100% (88.4% to 100%).

*One patient had selective IgA deficiency.