Table 1.

Descriptive characteristics of included REGARDS participants by income category

	Total	Income less than $35,000	Income $35,000 and above
Sample characteristics at baseline	(N=20,808)	(N=9,721)	(N=11,087)
Sex (female)	57.1%	66.5%	48.8%
Race (Black)	42.6%	54.3%	32.4%
Age, median (IQR)	63 (13)	66 (14)	61 (12)
Education a
Less than high school	10.8%	20.2%	2.6%
High school graduate	25.1%	34.4%	16.8%
Some college	27.3%	27.6%	26.9%
College graduate and above	36.9%	17.8%	53.7%
Region
Belt Region	34.6%	37.4%	32.1%
Buckle Region	20.6%	20.2%	20.9%
Non-Belt Region	44.8%	42.4%	46.9%
Urbanicity b
Isolated	2.2%	2.3%	2.2%
Small-rural	5.7%	6.1%	5.3%
Large-rural	11.0%	11.9%	10.3%
Urban	81.0%	79.7%	82.2%
Self-reported health c
Excellent	17.9%	12.1%	23.1%
Very good	32.5%	26.0%	38.2%
Good	34.1%	38.6%	30.2%
Fair	12.9%	19.2%	7.4%
Poor	2.5%	4.0%	1.1%
Number of walking destinations, median (IQR)	44 (85)	53 (90)	35 (78)
Number of physical activity facilities, median (IQR)	1 (2)	1 (2)	1 (2)
Green Land Cover (km2), median (IQR)	0.59 (1.51)	0.44 (1.40)	0.72 (1.55)

Values show median (IQR) or %

^a12 participants had missing data on education

^b1859 participatns had missing data on urbanicity

^c28 participants had missing data on self-reported health