Figure 3

Antibody levels vs. Marsh grade. Antibody/autoantibody levels in serum/plasma against A) tissue transglutaminase (anti-TG2), B) deamidated gliadin (anti-DGP), and C) gliadin (anti-GL) vs. Marsh grade (0-3C) on a logarithmic scale. Open circles represent cases without a celiac disease (CD) diagnosis, open squares represent CD cases on a gluten-free diet, filled squares represent CD cases on a gluten-containing diet, and filled triangles represent cases under investigation for suspected CD. The dotted line represents the cut-off threshold for a positive result indicative of CD.