Variable | Value | Note | Source |
---|---|---|---|
Proportion of PWID HIV− (I) | 82.30% |  | Mehta [6] |
Number of needles in circulation (N) | 1,600,000 | Increased by 33% due to additional syringe sources | |
Rate of needle sharing (s) | 2.8% | Percent of injections with a needle already used by another person | Park et al. [83] |
Percentage of needles not bleached (d) | 100% | Â | Bluthenthal et al. [84] |
Proportion of PWID HIV+ (q) | 17.70% | Â | Mehta [6] |
Probability of HIV infections from a single injection (t) | 0.67% | Â | |
Number of sharing partners (m) | 1.2 | Per injection: ratio of receptive to distributive sharing | Park et al. [83] |
SIF client reduction in needle sharing (n) | 70% | From Insite | Kerr et al. [40] |
Number of SIF clients (N) | 2100 | Approximate monthly unique Insite injection room clients | Maynard [33] |
PWID Population (T) | 20,950 | Adjusted by authors from Baltimore MSA to City using race census data | Tempalski et al. [87] |
Lifetime HIV treatment cost | $402,000 | National data | CDC [88] |