True HIV Positive (PHIV) | True HIV Negative (1 − PHIV) | |||||
---|---|---|---|---|---|---|
Outcomes | DHC+, EIA+, WB+ | DHC- | DHC+, EIA- | DHC+, EIA+, WB- | DHC+ EIA- | DHC- |
Probability of result | (PHIV ∗ SenDHC ∗ SenEIA ∗ SenWB ) | (PHIV ∗ (1 − SenDHC)) | (PHIV ∗ SenDHC ∗ (1 − SenEIA)) | ((1 − PHIV) ∗ (1 − SpecDHC) ∗ (1 − SpecEIA) + SpecWB ) | ((1 − PHIV) ∗ (1 − SpecDHC) ∗ SpecEIA ) | (1 − PHIV) ∗ SpecDHC |
Inputs | ||||||
 Visit 1: Initial Screening - Community Peer Testing Service | ||||||
  Consult time | 60 Min | 30 Min | 60 Min | 60 Min | 60 Min | 30 Min |
  Staff Wage (Rate/Hour): | $45 | $45 | $45 | $45 | $45 | $45 |
  Staffing | Peer | Peer | Peer | Peer | Peer | Peer |
 Pathology costs | ||||||
  Rapid Alere (DHC) Determine Test | $11 | $11 | $11 | $11 | $11 | $11 |
Referral to Bulk Billing GP for Confirmatory Testing | ||||||
 Visit 1: Initial Screening | ||||||
  Consult time | 20 min | 20 min | 20 min | 20 min | ||
  Medicate Rebate | $71.701 | $71.701 | $71.701 | $71.701 | ||
  Staffing | GP | GP | GP | GP | ||
 Pathology costs | ||||||
  EIA test | $15.652 | $15.652 | $15.652 | $15.652 | ||
  WB confirmatory | $29.003 | $29.003 | ||||
 Visit 2: Test Results | ||||||
  Consult time | 40 min | 20 min | 20 min | 20 min | ||
  Medicate Rebate | $105.554 | $71.701 | $71.701 | $71.701 | ||
  Staffing | GP | GP | GP | GP | ||
Total Cost of Each Outcome | $277.90 | $33.50 | $215.05 | $244.05 | $215.05 | $33.50 |
Average cost per person tested | =(PHIV ∗ SenDHC ∗ SenEIA ∗ SenWB) ∗ AC per True PositiveDHC + , EIA + , WB+ + (PHIV ∗ (1 − SenDHC)) ∗ AC per False NegativeDHC− + (PHIV ∗ SenDHC ∗ (1 − SenEIA)) ∗ AC per False NegativeDHC + , EIA− + ((1 − PHIV) ∗ SpecDHC) ∗ AC True NegativeDHC− + ((1 − PHIV) ∗ (1 − SpecDHC) ∗ SpecEIA) ∗ False PositiveDHC + , EIA− + ((1 − PHIV) ∗ (1 − SpecDHC) ∗ (1 − SpecEIA) ∗ SpecWB) ∗ False PositiveDHC + , EIA + , WB− | |||||
Average number of tests for a positive diagnosis | \( =\frac{1}{P_{HIV}\ast Se{n}_{DHC}\ast Se{n}_{EIA}\ast Se{n}_{WB}} \) |