ToolsCalculators
HIV Incidence Risk Index for MSM (HIRI-MSM)
Screens men who have sex with men for elevated HIV acquisition risk.
HIV Incidence Risk Index for MSM (HIRI-MSM)
Age (years)
Number of male sex partners (past 6 months)
Receptive anal sex without a condom (past 6 months)
Number of HIV-positive male partners (past 6 months)
Insertive anal sex without a condom with an HIV-positive partner (past 6 months)
Methamphetamine use (past 6 months)
Amyl nitrite (poppers) use (past 6 months)
Result0 points
Score <10 suggests lower short-term HIV acquisition risk on this index.
- PrEP consideration threshold
- >=10
When to use
- Prioritising MSM for PrEP and more intensive HIV prevention counselling.
Formula
Sum of weighted points for age, partner numbers, condomless receptive and insertive anal sex, HIV-positive partners, and stimulant use. Range 0-47; cutoff >=10.
Pearls and pitfalls
- A screening aid only; it does not diagnose infection and should be paired with HIV testing.