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. Author manuscript; available in PMC: 2016 Jul 1.

Published in final edited form as: Ann Epidemiol. 2015 Mar 21;25(7):519–525.e2. doi: 10.1016/j.annepidem.2015.03.008

Table 2.

Prevalence estimates applying a finite period of enrollment criteria

		Prevalence definition^a
Disease		2009	2010	2011	2009–2010	2010–2011	Percent change in estimate^b
Crohn’s disease	Cases/100,000	109.7	113.5	119.4	164.2	172.4	31%
	n	31,414	36,765	42,862	30,195	40,981
Ulcerative colitis	Cases/100,000	82.7	87.3	92.0	154.3	159.5	42%
	n	23,671	28,301	33,016	28,373	37,915
EoE	Cases/100,000	26.7	34.5	42.0	53.4	68.0	38%
	n	7,642	11,178	15,065	9,828	16,152
Barrett’s esophagus	Cases/100,000	64.8	68.3	76.7	139.1	147.0	49%
	n	18,544	22,114	27,517	25,586	34,922
Celiac disease	Cases/100,000	27.2	32.6	37.7	54.5	66.6	43%
	n	7,779	10,550	13,523	10,017	15,817
Source population	n	28,629,771	32,400,533	35,896,982	18,390,346	23,764,543

^a

Definitions based on having continuous enrollment for period specified for any enrollee meeting the enrollment definition specified

^b

Change in estimate from least (12 months of continuous enrollment) to most restrictive (24 months of continuous enrollment) inclusion criteria