Outcome (at 2 years) 1 | Definition of outcome | Factor influencing efficiency of transmission | Factor reflecting exposure of susceptible to infected persons |
---|---|---|---|
Proportion of sexual acts involving a condom | Number of sex acts protected by a condom throughout divided by the number of sex acts in the last month2 | √ |  |
Condom use at last sex | At last sex, use of condom throughout | √ |  |
Unsafe sex | Inconsistent condom use with a HIV-negative or unknown serostatus partner in the past 6 months | √ | √ |
Sexually active | One or more sex acts in the last month |  | √ |
Frequency of sex acts within each partnership | The number of sex acts with each partner in the last month |  | √ |
Rates of acquisition of new sex partners | The number of new partnerships in the last 6 months divided by the person years of follow-up in the last 6 months |  | √ |
Rates of dissolution of existing partnerships | The number of partnerships ended in the last 6 months divided by the person years of follow-up in partnership in the last 6 months |  | √ |
Frequency of concurrent partnerships | Number of overlapping sexual partnerships in which sexual intercourse with one partner occurs between two acts of intercourse with another partner3 |  | √ |
Abstinence | No sexual intercourse during the past 6 months |  | √ |