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Table 2 Sources for variables used in mathematical modeling

From: A cost-benefit/cost-effectiveness analysis of proposed supervised injection facilities in Ottawa, Canada

Variable Value Source
Proportion of PWID HIV- (I) 88.00% Bayoumi & Strike[21]; Pilon et al.[29]
Proportion of PWID HCV- (I) 39.40% Bayoumi & Strike[21]; Pilon et al.[29]
Rate of Needle sharing (s) or (λ) 14% Bayoumi & Strike[21]
Number of needles in circulation (N) 837931 City of Ottawa[30]
Percentage of needles not cleaned (d) 17.00% Kaplan and O’Keefe[5]; Jacobs et al.[31]
Probability of HIV infections from a single injection (t) or (α) 0.67% Kaplan and O’Keefe[5]
Probability of HCV infections from a single injection (t) 3% Gore & Bird[32]
Number of sharing partners (m) 1.38 Jacobs et al.[31]
Proportion of PWID HIV + (q) or (π) 12.00% Bayoumi & Strike[21]; Pilon et al.[29]
Proportion of PWID HCV + (q) 60.60% Bayoumi & Strike[21]; Pilon et al.[29]
Proportion of HIV or HCV infected needles (β) 40.50% Kaplan and O’Keefe[5]
Probability of needles cleaned (θ) 83% Kaplan and O’Keefe[5]; Jacobs et al.[21]