Table 7.

Values, notes, and sources for variables used to predict savings from overdose-related hospitalizations

Variable	Value	Note	Source
Total annual injections in the SIF (I)	180,000	Based on Insite capacity and use	Milloy et al. [45]
Percent of injections resulting in overdose (o)	0.133%	Insite’s rate used as conservative estimate, since Baltimore has a higher overdose rate than Vancouver	Kerr et al. [99], Kerr et al. [16], Milloy et al. [45], Astemborski and Mehta [100]
Rate of overdose resulting in hospitalization (a o)	12%		Pollini et al. [50]
Rate of SIF overdose hospitalization (a i)	0.79%	Ambulance call rate for MSIC, an upper bound for hospitalizations	KPMG [14]
Cost of overdose hospitalization (E)	$2500	Average hospital day cost for Maryland	Pfuntner [103]