Table 2.

Expanded field services outcomes, populations in which outcomes should be measured and program evaluation metrics

Field Services Outcomes	Populations in which outcome may be relevant	Proposed Program Evaluation Metrics
Partner notification, testing and treatment	Newly diagnosed HIV infection Bacterial STI HIV-infected index patients and partners who are out of care	Number (%) of new HIV/STI diagnoses initiated and interviewed for PS Number (%) of partners notified, tested newly diagnosed with HIV/STI and linked to HIV/STI care*.
HIV testing and retesting	Index cases with bacterial STIs Partners of index cases receiving STI partner services	Number (%) of index cases tested for HIV infection Number (%) of partners of persons with STI tested for HIV Number (%) of PS recipients and partners accepting testing reminders or with a reminder system in place
Increase condom use	Index cases and partners receiving HIV or STI partner services	Number (%) of index cases and partners accepting condoms**
Referral for PrEP	Index cases at high risk for HIV receiving STI partner services+ Sex partners of persons with HIV or early syphilis	Number (%) high-risk persons accepting PrEP referral Number (%) high-risk persons initiating PrEP Number (%) persons on PrEP 6 months following PrEP initiation
Linkage to HIV care	Index cases receiving HIV partner services	Number (%) linked to care within 1 and 3 months of diagnosis
Relinkage to HIV care	Index cases receiving STI partner services who are found to be out of care, partners of persons receiving partner services found to be out of care	Number (%) of index cases and partners contacted who are out of care or off antiretroviral therapy (ART) Number (%) of index cases and partners who are out of care or off ART who are relinked to care++
Increase use of effective contraception	Women receiving partner services and female partners of persons receiving partner services who do not desire pregnancy and are not using long-acting contraception	Number (%) of women who do not desire pregnancy who are not using effective contraception Number (%) of women linked to family planning and initiating effective contraception following partner services
Referral for health insurance	Uninsured persons (index cases ore partners) identified through partner services	Number of persons who are uninsured Number of persons linked to insurance navigators Number of uninsured persons newly insured

^*Outcomes should be evaluated using verified (confirmed by DIS) and unverified dispositions (index patient report alone). Also, timing of partner HIV notification and testing relative to index patient interview should ideally be measured to define notification and testing occurring prior to PS intervention. Outcomes best evaluated as indices (events per index case receiving PS)

⁺PrEP referral should ideally be guided by local epidemiology on HIV risks. Throughout the U.S., persons with an HIV-infected sex partner who is not on antiretrovirals, MSM with early syphilis or rectal gonorrhea and MSM who use methamphetamine are at high risk for HIV and should be offered PrEP.

^**Condom use should ideally be monitored at the population-level using sentinel (e.g. STD clinic data) and population-based (e.g. National HIV Behavioral Surveillance, Behavioral Risk Factor Surveillance) surveillance sources of data.

⁺⁺DIS should ask all HIV-infected persons contacted through partner services if they have an HIV medical provider, when they last saw that provider, when they are scheduled to see their provider next, and if they are taking ART. Persons without a medical provider or with no follow-up planned should be relinked to care. Public health programs should seek to promote universal ART use through partner services.