Researchers have estimated rates of celiac disease diagnosis in the United States as follows:
0.9 per 100,000 in 1950 to 1989
3.3 per 100,000 in the 1990s
9.1 per 100,000 in 2000 and 2001
20.6 per 100,000 in 2003
There have been increases in the diagnosis rate in all age groups. The increases have been larger, however, in older age groups (probably because in the past older people were never tested for celiac disease) and in females (for reasons that are not understood yet).
Murray JA et al. Trends in the identification and clinical features of celiac disease in a North American community, 1950–2001. Clinical Gastroenterology and Hepatology 2003;1:19–27.
Green PHR et al. Economic benefits of increased diagnosis of celiac disease in a national managed care population in the United States. Journal of Insurance Medicine 2008;40:218–228.