Antibody test	Sensitivity (%)	Specificity (%)	Time course	Cost*
IgA antiendomysial antibody	85 to 100	96 to 100	Antibody disappears within several months after institution of gluten-free diet.	$45 to 99
IgA antitransglutaminase antibody	95	90	Limited data; correlated with IgA antiendomysial antibody in studies	85 to 164
IgA antigliadin antibody	53 to 100	65 to 100	More persistent than IgA antiendomysial antibody; may persist for 6 months or longer	45
IgG antigliadin antibody	57 to 100	42 to 98	Most persistent; may be detectable up to 12 months after institution of gluten-free diet	45 to 90
			False-positive tests reported in patients with Crohn's disease, wheat-protein allergy, and postdiarrhea states