TABLE 1.

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

Variable	n	Actual %	Population-weighted % a
Age:
18-24 y	12,419	17.3%	14.0%
25-45 y	37,055	51.6%	40.0%
45-64 y	20,468	28.5%	30.0%
≥65 y	1870	2.6%	16.0%
Gender:
Female	42,696	59.5%	51.0%
Male	29,116	40.5%	49.0%
Race/ethnicity:
Non-Hispanic whites	50,943	70.9%	62.0%
Non-Hispanic blacks	6353	8.9%	12.0%
Latinos	8255	11.5%	18.0%
Asians	3914	5.5%	6.0%
Other	2347	3.3%	2.0%
Education level:
Did not graduate high school	2862	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	33.5%	32.7%
Graduate degree	7353	10.2%	10.7%
Marital status:
Single	19,120	26.6%	24.5%
Divorced, separated, or widowed	8592	12.0%	16.1%
Married or long term relationship	44,100	61.4%	59.4%
Employment status:
Unemployed	24,680	34.4%	40.3%
Employed or full-time student	47,132	65.6%	59.7%
Total household income:
$0 to 50,000	35,725	49.8%	50.0%
$50,001 to 100,000	22,226	31.0%	30.7%
$100,001 to 200,000	7582	10.6%	10.3%
≥$200,001	1110	1.6%	1.7%
Prefer not to say	5169	7.2%	7.4%
Diarrhea within past week	15,976	22.3%	20.2%
Constipation within past week	15,030	20.9%	19.7%
Crohn’s disease b	553	0.8%	0.8%
Ulcerative colitis b	627	0.9%	1.1%
Celiac disease b	755	1.1%	0.9%
Diabetes b	4508	6.3%	8.6%
HIV/AIDS b	233	0.3%	0.4%
Irritable bowel syndrome b	2958	4.1%	3.8%
Chronic idiopathic constipation b	276	0.4%	0.4%

^aPopulation weights based on latest U.S. Census data for age, sex, and race/ethnicity were applied to the sample data in order to produce population estimates. See Supplement Table 2 for weights used in analyses.^{25, 26}

^bSelf-reported physician diagnosis.