Effectiveness of HIV self-testing when offered within assisted partner services in Western Kenya (APS-HIVST Study): a cluster randomized controlled trial.

INTRODUCTION: Assisted partner services (APS) is an effective strategy for increasing HIV testing, new diagnosis, and linkage to care among sexual partners of people living with HIV (PLWH). APS can be resource intensive as it requires community tracing to locate each partner named and offer them testing. There is limited evidence for the effectiveness of offering HIV self-testing (HIVST) as an option for partner testing within APS. METHODS: We conducted a cluster randomized controlled trial comparing provider-delivered HIV testing (Standard APS) versus offering partners the option of provider-delivered testing or HIVST (APS+HIVST) at 24 health facilities in Western Kenya. Facilities were randomized 1:1 and we conducted intent-to-treat analyses using Poisson generalized linear mixed models to estimate intervention impact on HIV testing, new HIV diagnoses, and linkage to care. All models accounted for clustering at the clinic level and new diagnoses and linkage models were adjusted for individual-level age, sex, and income a priori. RESULTS: From March to December 2021, 755 index clients received APS and named 5054 unique partners. Among these, 1408 partners reporting a prior HIV diagnosis were not eligible for HIV testing and were excluded from analyses. Of the remaining 3646 partners, 96.9% were successfully contacted for APS and tested for HIV: 2111 (97.9%) of 2157 in the APS+HIVST arm and 1422 (95.5%) of 1489 in the Standard APS arm. In the APS+HIVST arm, 84.6% (1785/2111) tested via HIVST and 15.4% (326/2111) received provider-delivered testing. Overall, 16.7% of the 3533 who tested were newly diagnosed with HIV (APS+HIVST = 357/2111 [16.9%]; Standard APS = 232/1422 [16.3%]). Of the 589 partners who were newly diagnosed, 90.7% were linked to care (APS+HIVST = 309/357 [86.6%]; Standard APS = 225/232 [97.0%]). There were no significant differences between the two arms in HIV testing (relative risk [RR]: 1.02, 95% CI: 0.96-1.10), new HIV diagnoses (adjusted RR [aRR]: 1.03, 95% CI: 0.76-1.39) or linkage to care (aRR: 0.88, 95% CI: 0.74-1.06). CONCLUSIONS: There were no differences between APS+HIVST and Standard APS, demonstrating that integrating HIVST into APS continues to be an effective strategy for identifying PLWH by successfully reaching and HIV testing >95% of elicited partners, newly diagnosing with HIV one in six of those tested, >90% of whom were linked to care. CLINICAL TRIAL NUMBER: NCT04774835.

Effectiveness of Using Additional HIV Self-Test Kits as an Incentive to Increase HIV Testing Within Assisted Partner Services.

BACKGROUND: Incentives have shown mixed results in increasing HIV testing rates in low-resource settings. We investigated the effectiveness of offering additional self-tests (HIVSTs) as an incentive to increase testing among partners receiving assisted partner services (APS). SETTING: Western Kenya. METHODS: We conducted a single-crossover study nested within a cluster-randomized controlled trial. Twenty-four facilities were randomized 1:1 to (1) control: provider-delivered testing or (2) intervention: offered 1 HIVST or provider-delivered testing for 6 months (pre-implementation), then switched to offering 2 HIVSTs for 6 months (post-implementation). A difference-in-differences approach using generalized linear mixed models, accounting for facility clustering and adjusting for age, sex, and income, was used to estimate the effect of the incentive on HIV testing and first-time testing among partners in APS. RESULTS: March 2021-June 2022, 1127 index clients received APS and named 8155 partners, among whom 2333 reported a prior HIV diagnosis and were excluded from analyses, resulting in 5822 remaining partners: 3646 (62.6%) and 2176 (37.4%) in the pre-implementation and post-implementation periods, respectively. Overall, 944/2176 partners (43%) were offered a second HIVST during post-preimplementation, of whom 34.3% picked up 2 kits, of whom 71.7% reported that the second kit encouraged HIV testing. Comparing partners offered 1 vs. two HIVSTs showed no difference in HIV testing (relative risk: 1.01, 95% confidence interval: 0.951 to 1.07) or HIV testing for the first time (relative risk: 1.23, 95% confidence interval: 0.671 to 2.24). CONCLUSIONS: Offering a second HIVST as an incentive within APS did not significantly impact HIV testing or first-time testing, although those opting for 2 kits reported it incentivized them to test.

State laws addressing teen dating violence in US high schools: A difference-in-differences study.

OBJECTIVE: Teen dating violence (TDV) is prevalent with lifelong adverse consequences, and strategies to reduce its burden are needed. Many U.S. states have enacted laws to address TDV in schools, but few studies have examined their effectiveness. This study aimed to assess whether state TDV laws were associated with changes in physical TDV victimization among high school students. METHODS: We used repeated cross-sectional data of high school students from the Youth Risk Behavior Survey across 41 states from 1999 to 2019. Using a difference-in-differences approach with an event study design, we compared changes in past-year physical TDV in states that enacted TDV laws (n = 21) compared to states with no required laws (n = 20). Analyses accounted for clustering at the state-level and state and year-fixed effects. We conducted sensitivity analyses to assess the robustness of our findings. RESULTS: In our sample of 1,240,211 students, the prevalence of past-year physical TDV was 9.2% across all state-years. In 1999, the prevalence of TDV at the state-level ranged from 7.5 to 13.0%; in 2019, the prevalence ranged from 3.7 to 10.5%. There was no significant association between TDV laws and past-year physical TDV. Six or more waves after enactment, we observed a non-significant 1.7% percentage point reduction in TDV in states with TDV laws (95% CI: -3.6 to 0.3 percentage points; p = 0.10). CONCLUSIONS: We found no significant association between enactment of TDV laws and physical TDV among high school students. Further research is needed to understand how TDV laws are implemented and components of TDV laws that may influence effectiveness.

Real-world impact of integrating HIV assisted partner services into 31 facilities in Kenya: a single-arm, hybrid type 2 implementation-effectiveness study.

BACKGROUND: Assisted partner services (APS), or exposure notification and HIV testing for sexual partners of individuals diagnosed with HIV (index clients), have been shown to be safe and effective in clinical trials. We assessed the real-world effectiveness of APS when integrated into HIV clinics in western Kenya. METHODS: In this single-arm, hybrid type 2 implementation science study, we facilitated APS implementation in 31 health facilities in Kenya by training existing health-care staff. We focused on male partner outcomes to assess the impact of APS in reaching male individuals in sub-Saharan Africa, who have lower rates of HIV testing than female individuals. Female individuals (aged ≥18 years or emancipated minor) who tested positive for HIV at participating facilities in Kenya were offered APS; consenting female participants provided contact information for all male sexual partners in the past 3 years. Male partners were notified of their potential HIV exposure and offered a choice of community-based or facility-based HIV testing services (HTS). Female index clients and male partners with HIV were followed up at 6 weeks, 6 months, and 12 months after enrolment, to assess linkage to antiretroviral treatment. Viral load was assessed at 12 months. FINDINGS: Between May 1, 2018, and March 31, 2020, 32 722 female individuals received HTS; 1910 (6%) tested positive for HIV, of whom 1724 (90%) received APS. Female index clients named 5137 male partners (median 3 per index [IQR 2-4]), of whom 4422 (86%) were reached with exposure notification and HTS. 524 (12%) of the male partners tested were newly diagnosed with HIV and 1292 (29%) reported a previous HIV diagnosis. At 12 months follow-up, 1512 (88%) female index clients and 1621 (89%) male partners with HIV were taking ART, with few adverse events: 25 (2%) female index clients and seven (<1%) male partners reported intimate partner violence, and 60 (3%) female index clients and ten (<1%) male partners reported relationship dissolution. INTERPRETATION: Evidence from this real-world APS scale-up project shows that APS is a safe, acceptable, and effective strategy to identify males with HIV and retain them in care. FUNDING: The US National Institutes of Health.

Using Behavioral Economics to Support PrEP Adherence for HIV Prevention.

PURPOSE OF REVIEW: We explored different behavioral economics (BE) mechanisms through which pre-exposure prophylaxis (PrEP) initiation and adherence could be impacted and examined recent work using BE principles to further HIV prevention efforts. We also generated new intervention ideas based on existing HIV testing and ART adherence literature. RECENT FINDINGS: There is limited work that uses BE principles to design interventions to increase PrEP initiation and adherence, mostly involving financial incentives. The recent works highlighted involve financial incentives and demonstrate that key populations are open to accepting monetary incentives to increase PrEP initiation and improve adherence. However, there are mixed results on the long-term impacts of using incentives to modify behavior. While there are a few ongoing studies that utilize BE principles to increase PrEP use, there is need to develop studies that test these concepts, to promote PrEP initiation and adherence. We suggest methods of exploring non-incentives-based ideas to increase PrEP use in key populations.

Firearm ownership and access to healthcare in the U.S.: A cross-sectional analysis of six states.

Provider-led firearm storage counseling is a form of firearm suicide prevention intervention. Little research examines whether barriers to healthcare access for at-risk individuals limit this intervention's impact. This study explores the relationship between household firearm presence/storage practices and healthcare access/utilization using a cross-sectional analysis of the 2017 Behavioral Risk Factor Surveillance System (BRFSS), which included state-representative data from six states that completed the Firearm Safety and Healthcare Access Modules: California, Idaho, Kansas, Oregon, Texas, and Utah. Exposures were household firearm presence and firearm storage practices. Outcomes were lacking health insurance, not having a healthcare provider, inability to afford care, and no recent routine checkup. Logistic regression models adjusted for age, sex, education, employment, children in the household, and state of residency. Our analysis included 31,888 individuals; 31.1% reported a household firearm. Compared to those in firearm-owning households, those in non-firearm-owning households had higher odds of being uninsured (aOR 1.99, 95%CI 1.60-2.48), not having a provider (aOR 1.40, 95%CI 1.18-1.67), and reporting cost as a barrier to care (aOR 1.37, 95%CI 1.13-1.67). Among firearm-owning households, those with firearms stored loaded and unlocked had higher odds of lacking a personal healthcare provider (aOR 1.52, 95%CI 1.07-2.15) compared to individuals in homes where firearms were stored unloaded. Results indicate that while individuals in firearm-owning households are more likely than non-firearm owning households to have healthcare access, those in homes with the riskiest firearm storage practices had less access. Provider-led counseling may have limited reach for individuals in homes with risky firearm storage practices.

Using Assisted Partner Services for HIV Testing and the Treatment of Males and Their Female Sexual Partners: Protocol for an Implementation Science Study.

BACKGROUND: Despite the effective scale-up of HIV testing and treatment programs, only 75% of people living with HIV (PLWH) globally know their status, and this rate is lower among men. This highlights the importance of implementing HIV testing and linkage interventions with a high uptake in this population. In a cluster randomized controlled trial conducted in Kenya between 2013 and 2015, we found that assisted partner services (APS) for HIV-exposed partners of newly diagnosed PLWH safely reached more HIV-exposed individuals with HIV testing compared with client referral alone. However, more data are needed to evaluate APS implementation in a real-world setting. OBJECTIVE: This study aims to evaluate the effectiveness, acceptability, fidelity, and cost of APS when integrated into existing HIV testing services (HTS) in Western Kenya. METHODS: Our study team from the University of Washington and PATH is integrating APS into 31 health facilities in Western Kenya. We are enrolling females newly diagnosed with HIV (index clients) who consent to receiving APS, their male sexual partners, and female sexual partners of male sexual partners who tested HIV positive. Female index clients and sexual partners testing HIV positive will be followed up at 6 weeks, 6 months, and 12 months postenrollment to assess linkage to care, antiretroviral therapy initiation, and HIV viral load suppression. We will evaluate the acceptability, fidelity, and cost of real-world implementation of APS via in-depth interviews conducted with national, county, and subcounty-level policy makers responsible for HTS. Facility health staff providing HTS and APS, in addition to staff working with the study project team, will also be interviewed. We will also conduct direct observations of facility infrastructure and clinical procedures and extract data from the facilities and county and national databases. RESULTS: As of March 2020, we have recruited 1724 female index clients, 3201 male partners, and 1585 female partners. We have completed study recruitment as well as 6-week (2936/2973, 98.75%), 6-month (1596/1641, 97.25%), and 12-month (725/797, 90.9%) follow-up visits. Preliminary analyses show that facilities scaling up APS identify approximately 12-18 new HIV-positive males for every 100 men contacted and tested. We are currently completing the remaining follow-up interviews and incorporating an HIV self-testing component into the study in response to the COVID-19 pandemic. CONCLUSIONS: The results will help bridge the gap between clinical research findings and real-world practice and provide guidance regarding optimal strategies for APS integration into routine HIV service delivery. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): DERR1-10.2196/27262.

Applying Behavioral Economics to Enhance Safe Firearm Storage.

Behavioral economics applies key principles from psychology and economics to address obstacles to behavior change. The important topic of pediatric firearm injuries has not yet been explored through a behavioral economic lens. Pediatric firearm-related injuries are a significant public health problem in the United States. Despite American Academy of Pediatrics guidelines advising that firearms be stored unloaded, in a locked box or with a locking device, and separate from ammunition, estimates suggest that ∼4.6 million children live in homes with at least 1 loaded and unlocked firearm. In this article, we use behavioral economic theory to identify specific cognitive biases (ie, present bias; in-group, out-group bias; and the availability heuristic) that may influence parental decision-making around firearm storage. We illustrate situations in which these biases may occur and highlight implementation prompts, in-group messengers, and increased salience as behaviorally informed strategies that may counter these biases and subsequently enhance safe firearm storage. We also describe other opportunities to leverage the behavioral economic tool kit. By better understanding the individual behavioral levers that may impact decision-making around firearm storage, behavioral scientists, pediatric providers, and public health practitioners can partner to design and test tailored interventions aimed at decreasing pediatric firearm injuries. Further empirical study is warranted to identify the presence of specific biases and heuristics and determine the most effective behavior change strategies for different subpopulations.