Table 1.

Percentage of block group characteristics by exposure group.

Variables	Exposure group
	$<45\text{\hspace{0.17em}dB}\left(\mathrm{A}\right)$	$45\text{\hspace{0.17em}to}<55\text{\hspace{0.17em}dB}\left(\mathrm{A}\right)$	$55\text{\hspace{0.17em}to}<65\text{\hspace{0.17em}dB}\left(\mathrm{A}\right)$	$\ge 65\text{\hspace{0.17em}dB}\left(\mathrm{A}\right)$
Race/ethnicity (%)
Non-Hispanic black	16.4	18.6	19.7	25.7
Non-Hispanic Asian	8.1	8.5	9.0	2.7
Hispanic	21.9	26.8	32.3	38.9
Non-Hispanic other	3.1	3.0	2.9	3.1
Non-Hispanic white	50.6	43.1	36.0	29.6
Education (%)
$<\text{High school}$ diploma or GED	14.1	17.0	20.5	23.9
High school diploma or GED	23.5	25.6	27.4	29.3
$>\text{High school}$ diploma or GED	62.4	57.4	52.1	46.8
Household income (%)
$<\$\mathrm{25,000}$	22.0	23.9	25.9	26.0
$\$\mathrm{25,000}$ to $<\$\mathrm{50,000}$	22.3	23.6	24.8	24.9
$\$\mathrm{50,000}$ to $<\$\mathrm{75,000}$	17.3	17.6	17.8	19.5
$\ge \$\mathrm{75,000}$	38.5	34.9	31.4	29.6

Note: Educational attainment is based on the block group population $\ge 25\text{\hspace{0.17em}years}$ of age. GED, General Education Development