Table 1.

Description of neighborhood socioeconomic status computations

Description	ACS Variable	Computation
Percent of adults older than 25 with less than a high school education	B15003	${\Sigma }_{i=2}^{16}$
		$\frac{\text{HD}01\hspace{0.17em}{\text{VD}}_{\mathrm{i}}}{\text{HD}01\text{\_VD}01}$
Percent male unemployment	B23022	$\frac{\text{HD}01\hspace{0.17em}\hspace{0.17em}\text{VD}26}{\text{HD}01\text{\_VD}02}$
Percent of households with income below the poverty line	B17017	$\frac{\text{HD}01\hspace{0.17em}\text{VD}02}{\text{HD}01\text{\_VD}01}$
Percent of households receiving public assistance	B19057	$\frac{\text{HD}01\hspace{0.17em}\text{VD}02}{\text{HD}01\text{\_VD}01}$
Percent of female-headed households with children	B23007	$\frac{\text{HD}01\hspace{0.17em}{\text{Vd}}_{\mathrm{i}}}{\text{HD}01\text{\_VD}01}$
Median household income	B19013	$\text{HD}01\text{\_VD}01$

Note: The variables reported by Bird et al were mapped to the American Community Survey (ACS). Variables to compute the Bird index were calculated from the ACS 5-year estimates at the block group level