Table 1.

Characteristics of Participants by Physician vs. General Public

	General public			Physician			p value
	N = 747,227	[95% CI]		N = 3009	[95% CI]
Age (SD)	47.17 ( 20.61)			47.64 (14.9)			0.4
Female	52.1%	52.0%	52.3%	33.5%	31.6%	35.5%	< 0.001
Married	53.7%	53.6%	53.9%	77.8%	76.1%	79.5%	< 0.001
Non-rural	84.0%	83.9%	84.1%	92.7%	91.8%	93.7%
Children in household	37.5%	37.4%	37.6%	52.2%	50.2%	54.2%
Employed	61.9%	61.8%	62.0%	99.1%	98.7%	99.5%
Race/ethnicity
White	71.5%	71.4%	71.7%	71.7%	69.8%	73.6%	< 0.001
Black	12.0%	11.9%	12.1%	5.2%	4.2%	6.2%
Native American	0.7%	0.7%	0.7%	0.2%	0.0%	0.4%
Asian	3.8%	3.7%	3.8%	15.7%	14.1%	17.2%
Other	1.5%	1.5%	1.5%	1.3%	0.8%	1.7%
Hispanic	10.5%	10.4%	10.6%	6.0%	4.9%	7.0%
Region
Northeast	18.2%	18.1%	18.3%	22.0%	20.3%	23.8%	< 0.001
Midwest	22.6%	22.5%	22.7%	21.1%	19.5%	22.8%
South	37.1%	37.0%	37.2%	34.6%	32.7%	36.6%
West	22.1%	22.0%	22.2%	22.2%	20.5%	23.8%
Household income
<20K	15.7%	15.6%	15.8%	1.7%	1.1%	2.3%	< 0.001
20–35K	16.8%	16.7%	16.9%	1.9%	1.4%	2.5%
35–50K	14.1%	14.0%	14.2%	4.1%	3.2%	5.0%
50–75K	19.6%	19.5%	19.7%	8.2%	7.0%	9.3%
≥ 75K	33.8%	33.7%	33.9%	84.0%	82.4%	85.7%
Duration of residence
< 1 year	13.7%	13.6%	13.8%	13.1%	11.5%	14.8%	< 0.001
1–5 years	27.1%	27.0%	27.2%	30.7%	28.8%	32.7%
> 5 years	59.2%	59.1%	59.3%	56.1%	54.0%	58.3%
Education
High school or less	41.3%	41.2%	41.4%	0.8%	0.5%	1.2%	< 0.001
Some college	29.6%	29.5%	29.7%	1.7%	1.2%	2.2%
Bachelor’s degree	19.4%	19.3%	19.5%	2.3%	1.6%	2.9%
Graduate degree	9.7%	9.6%	9.8%	95.2%	94.3%	96.1%

Note: The imputed dataset accounting for missing variables of income, duration at residence, and rural location was used for this tabulation. P values were calculated based on Pearson’s chi-squared test for the hypothesis that the distribution of each covariate is independent from the groups—general public vs. physician group