TABLE 1.

National GI Survey participant demographics (N=71,812).

Variable	n	Actual %	Population-weighted %a
Age:
18–29 y	23,962	33.4%	26.5%
30–39 y	19,284	26.9%	20.8%
40–49 y	11,854	16.5%	15.5%
50–59 y	10,808	15.1%	15.6%
≥60 y	5,904	8.2%	21.5%
Gender:
Female	42,696	59.5%	51.0%
Male	29,116	40.5%	49.0%
Race/ethnicity:
Non-Hispanic white	50,943	70.9%	62.0%
Non-Hispanic black	6,353	8.9%	12.0%
Latino	8,255	11.5%	18.0%
Asian	3,914	5.5%	6.0%
Other	2,347	3.3%	2.0%
Education level:
Did not graduate high school	2,862	4.0%	4.2%
High school graduate	15,295	21.3%	21.5%
Some college	22,282	31.0%	30.9%
College graduate	24,020	33.4%	32.7%
Graduate degree	7,353	10.2%	10.7%
Marital status:
Single	19,120	26.6%	24.5%
Divorced, separated, or widowed	8,592	12.0%	16.1%
Married or in long term relationship	44,100	61.4%	59.4%
Employment status:
Unemployedb	24,680	34.4%	40.3%
Employed or full-time student	47,132	65.6%	59.7%
Total household income:
$0–50,000	35,725	49.7%	50.0%
$50,001–100,000	22,226	31.0%	30.7%
$100,001–200,000	7,582	10.6%	10.3%
≥$200,001	1,110	1.5%	1.7%
Prefer not to say	5,169	7.2%	7.4%
Irritable bowel syndrome	2,958	4.1%	3.8%
Chronic idiopathic constipation	276	0.4%	0.4%
Gastrointestinal cancer	407	0.6%	0.8%
Celiac disease	755	1.1%	0.9%
Cirrhosis	450	0.6%	0.7%
Crohn’s disease	553	0.8%	0.8%
Ulcerative colitis	627	0.9%	1.1%
Diabetes	4,508	6.3%	8.6%
Endometriosis	1,680	2.3%	2.0%
Gallstones	3,058	4.3%	4.5%
HIV/AIDS	233	0.3%	0.4%
Pancreatitis	539	0.8%	0.8%
Peptic ulcer disease	1,172	1.6%	1.7%
Thyroid disease	3,483	4.9%	5.2%

^aPopulation weights based on recent US Census data for age, sex, and race/ethnicity were applied to the sample data in order to produce population estimates; the actual weights used in the analyses were previously described elsewhere.^{13, 14}

^bIncludes those who reported being unemployed, on disability, on leave of absence from work, retired, or homemaker.