Table 5.

Summary of patterns in the use of sexual risk reduction strategies by class

Strategies	Class 1	Class 2	Class 3	Class 4	Class 5
Based on behavior in the past three months
Strict serosorting for HIV+ and HIV? (unknown status) partners	✓✓
Strict serosorting for HIV+ partners		✓✓	✓✓
Condom use with HIV? partners (condom serosorting)	✓		✓✓
Strategic positioning with HIV? partners		✓
Strategic positioning with HIV+ partners, undetectable viral load				✓
Strategic positioning with HIV+ partners, detectable or unknown viral load					✓
Taking viral load into consideration				✓✓
Condom use when bottom with HIV? partners (condom positioning)			✓		✓
Condom use when bottom with HIV+ partners, undetectable viral load				✓
Condom use with HIV+ partners, detectable or unknown viral load (condom serosorting)					✓
Based on past behaviors
Tested for HIV in the previous 12 months	✓		✓	✓✓	✓✓
Ever taken PEP in the past				✓✓	✓

HIV? (unknown status); HIV+ (seropositive status); ✓✓ primary strategy; ✓ secondary strategy