Table 4.

Differences in area-based social measures by geographic level (n = 179).

	Neighborhood level metric*	Zip code level metric*	P-value	Neighborhood level metric*	County evel metric*	P-value	Zip level	County level	P-value
African American/Black
Median household income (in $1,000s) (IQR)	$33.7 ($25.8–$51.2)	$34.4 ($30.3–$45.8)	0.315	$33.7 ($25.8–$51.2)	$45.0 ($37.7–$45.8)	0.237	34.4 (30.3–45.8)	45.0 (37.7–45.8)	<0.001
Median % HS graduate (IQR)	84.1 (75.5–92.6)	82.4 (76.5–88.1)	0.736	84.1 (75.5–92.6)	86.6 (79.3–88.4)	0.150	82.4 (76.5–88.1)	86.6 (79.3–88.4)	0.055
Median % impoverished (IQR)	21.4 (13.8–30.3)	25.2 (18.9–32.6)	0.042	21.4 (13.8–30.3)	18.8 (17.4–23)	0.156	25.2 (18.9–32.6)	18.8 (17.4–23)	<0.001
Median % uninsured (IQR)	20.2 (13.2–24.3)	22.1 (17.8–25.2)	0.043	20.2 (13.2–24.3)	17.1 (15.5–20.7)	0.558	22.1 (17.8–25.2)	17.1 (15.5–20.7)	<0.001
Median SVI percentile (IQR)		NA		0.6 (0.5–0.9)	0.3 (0.1–0.5)	<0.001	NA
White
Median household income (in $1,000s) (IQR)	$52.8 ($41.0–$71.1)	$47.3 ($37.5–$61.6)	<0.01	$52.8 ($41.0–$71.1)	$45.6 ($39.2–$51.3)	<0.001	47.3 (37.5–61.6)	45.6 (39.2–51.3)	<0.001
Median % HS graduate (IQR)	87.9 (80.2–95.0)	85.1 (79.8–91.1)	0.061	87.9 (80.2–95.0)	85.4 (79.3–88.4)	0.008	85.1 (79.8–91.1)	85.4 (79.3–88.4)	0.103
Median % impoverished (IQR)	13.7 (7.6–18.8)	15.2 (9.8–20.7)	0.139	13.7 (7.6–18.8)	18.8 (15.6–21.3)	<0.001	15.2 (9.8–20.7)	18.8 (15.6–21.3)	<0.001
Median % uninsured (IQR)	15.2 (11.4–21.4)	17.2 (13.4–20.4)	<0.01	15.2 (11.4–21.4)	18.6 (17.1–21.5)	<0.001	17.2 (13.4–20.4)	18.6 (17.1–21.5)	<0.01
Median SVI percentile (IQR)				0.5 (0.2–0.6)	0.3 (0.1–0.5)	<0.01

SVI, social vulnerability index. Block group-level measures: household income and graduation rate. Census tract-level measures: SVI, % uninsured, % impoverished. Bold indicates statistical significance, P < 0.05.

^*All between-race differences P < 0.05.