Table 4.

Values, notes and sources for variables used to predict savings from averted overdose deaths

Variable	Value	Note	Source
Percent overdose death reduction within 500 m attributed to Insite (r)	25.7%	36% reduction within 500 m of Insite vs. 9.3% further away	Marshall et al. [46]
Largest share of naloxone administrations within 500-m radius in Baltimore (n)	5%	Lowered from 6.2% to account for reversion to mean based on limited years of data	BCFD [97]
Annual Baltimore overdose deaths (D)	463	Heroin-related overdose deaths in first three quarters of 2016 extrapolated to full year	DHMH [1, 47]
Estimated value per overdose death averted (V)	$503,869	Calculated by authors using the variables below.
Average years until retirement (N)	30	Assuming retirement age of 65	Genberg et al. [49]
Median wage for Baltimore City (W)	$25,707		Census Bureau [98]
Discount rate (r)	3%		Andresen and Boyd [44]