Age

≥ 40 years (0 pts)+030–39 years (+4 pts)+425–29 years (+5 pts)+518–24 years (+8 pts)+8

Number of Male Partners with Unprotected Anal Sex (Past 6 Months)

0 partners (0 pts)+01 partner (+4 pts)+42–4 partners (+5 pts)+5≥ 5 partners (+9 pts)+9

Unprotected Anal Sex with HIV-Positive or Unknown Status Partner (Past 6 Months)

No (+0 pts)+0Yes (+6 pts)+6

Recreational Drug Use or Poppers (Amyl Nitrite) Use with Sex (Past 6 Months)

No (0 pts)+0Yes (+3 pts)+3

Rectal STI in Past 12 Months (Gonorrhea, Chlamydia, Syphilis)

No STI in past year (0 pts)+0Rectal STI in past 12 months (+2 pts)+2

Inconsistent Condom Use with Male Partners (< 100% Use)

Consistent condom use (100%) (0 pts)+0Inconsistent or no condom use (+2 pts)+2

HIRI-MSM — HIV Incidence Risk Index for Men Who Have Sex with Men