Epidemiological features of coeliac disease patients related to the presence (group 1) or absence (group 2) of associated autoimmune (AI) diseases. Column A: dermatitis herpetiformis included as AI disease; column B: dermatitis herpetiformis regarded as not an AI condition (in six of 42 patients with dermatitis herpetiformis, other AI diseases occurred)
2-150 Unpaired Student's t test;
2-160 χ2 test.