<<Disclaimer: Verify this information before applying it to your situation.>> I didn't post that message, but Catassi et al in Lancet, Jan. 22, 1994, vol. 343, pl 200 tested 3500 school children in central Italy and found an incidence of 1:303 and showed that 2% of these children had elevated anti-gliadin antibodies. Colin et al in the SCANDANAVIAN JOURNAL OF GASTROENTEROLOGY demonstrated that on follow-up (I think it was 2 years later) about one third of those patients who had raised antibodies at the first endoscopy, but no villous atrophy, now had villous atrophy. That would put your numbers over 1:200 (that was in 28(7):595-8, 1993. In addition, another study that I can't find right now was done by testing blood samples from healthy blood donors. Donors with elevated levels were asked to undergo endoscopic examination. Some refused. Of those who underwent endoscopy many were identified as having cd. I believe the ratio was 1:256, all of whom thought themselves healthy enough to be donating blood. Extrapolating from the number who consented to endoscopy, had the ratio remained constant, the proportion would have been 1:187. Please remember that these were healthy blood donors, not folks in a GI department of a hospital. I dont know where the other poster got her/his information, but their numbers jibe with the ones I've been reading. I just found that last study. It is: Grodzinsky et. al. "High Prevalence of Celiac Disease in Healthy Adults Revealed by anti-gliadin Antibodies" ANNALS OF ALLERGY vol.69, July 1992, p. 66-70. I hope that is helpful. Best Wishes, Ron Hoggan