Table 2.

Spearman correlation coefficients among socioeconomic status variables

	Poverty Rate (%) (n = 774)	Percentage of Single-Female–headed Households with Children (n = 774)	Unemployment Rate (%) (n = 774)	High School Dropout Rate (%) (n = 774)	Linear Distance to Nearest Major Road (n = 532)	Road Travel Distance to Nearest Major Road (n = 532)
Poverty rate, %	1	0.83*	0.80*	0.30*	−0.26*	−0.34*
Percentage of single-female–headed households with children		1	0.71*	0.23*	−0.19*	−0.24*
Unemployment rate, %			1	0.28*	−0.21*	−0.19*
High school dropout rate, %				1	−0.04	−0.08
Linear distance to nearest major road, mi					1	0.47*
Travel distance to nearest major road, mi						1

^*P < 0.001.