The Power of the Shared Experience: MTN-020/ASPIRE Trial Participants' Descriptions of Peer Influence on Acceptability of and Adherence to the Dapivirine Vaginal Ring for HIV Prevention.

Women are disproportionately at risk of acquiring HIV in East and Southern Africa, despite global declines in incidence. Female-initiated HIV prevention methods, like the dapivirine vaginal ring, are needed to end the HIV epidemic. In-depth interviews and focus groups retrospectively explored peer influence on acceptability of and adherence to the ring during the ASPIRE trial, a phase III placebo-controlled trial. Results were analyzed using an inductive analytic approach. Study participants (peers) of all ages and adherence groups developed important interpersonal connections and reported being more open and honest with each other than with external peers or study staff. Study peers who knew each other prior to joining appeared to have a stronger influence on each other's adherence than peers who met in the study. External peers provided primarily negative input about the ring and study, which sometimes led to ring removals. Peers' influence on each other's behavior in both prosocial and detrimental manners could have repercussions on adherence to a biomedical intervention, and consequently, individual disease risk and clinical trial outcomes. Future ring demonstration and implementation studies could use peer networks to intentionally influence uptake and adherence to the ring.

Relationship Type and Use of the Vaginal Ring for HIV-1 Prevention in the MTN 020/ASPIRE Trial.

Gender roles and imbalances in sexual power contribute to the heightened HIV-1 risk faced by women in Sub-Saharan Africa. This has led prevention research to focus on the development of female controlled methods. Despite the design of products such as vaginal rings to be used autonomously by women, male partners and women's perceptions of relationships influence HIV prevention choices. To understand the influences that male partners and dyadic dynamics had on the use of the Dapivirine Vaginal Ring in the ASPIRE trial, this analysis of qualitative data explored the types of intimate partner relationships that women engaged in. This paper describes how partners facilitated or challenged women's ring use and how women dealt with these challenges within six different types of relationships characterized by power dynamics and commitment levels. We offer insights into how future use of female-initiated HIV prevention products can be promoted through recognition of different relationship types.

Perspectives from Young South African and Zimbabwean Women on Attributes of Four (Placebo) Vaginal Microbicide Delivery Forms.

INTRODUCTION: Incorporating end-user input into the design of new vaginal microbicides for women is key to optimizing their uptake, consistent use, and, ultimately, success in combatting the heterosexual HIV epidemic. METHODS: The Quatro Study assessed four placebo forms of vaginally inserted HIV-microbicides among young microbicide-naïve African women: on-demand film, insert and gel, and monthly ring. Participants randomly used each product for 1 month and provided product satisfaction ratings (1-5 scale), and opinions on product attributes and potential alternative designs. Qualitative data were collected through focus group discussions at study exit. Multivariable associations between attribute opinions and overall product rating were examined using Poisson regression models with robust standard errors to assess the attributes most influential to satisfaction. RESULTS: Overall opinions of products and their individual attributes were generally positive; all products were rated either 4 or a 5 by ≥ 50% of participants. Attributes related to ease of use and interference with normal activities were the most salient predictors of satisfaction. Preferences for duration of use tended toward relatively shorter use periods for the ring (i.e., 1-3 months vs. 12 months) and for coitally independent dosing for the on-demand products. CONCLUSIONS: How well a product fit in with participants' lifestyles was important to their overall satisfaction. For on-demand products, greater flexibility around timing of use was desired, to avoid coital dependency of the dosing.

Discrepancies in diagnosis of incident HIV infection between antibody- and DNA-based tests in a phase III prevention trial in southern Africa.

Dried blood spots (DBS) are widely used to test for HIV in a variety of research and service delivery settings; however, uniform guidelines regarding collection, storage and DNA extraction processes have neither been developed nor evaluated. Previously published reports suggested DBS may be stored at room temperature for up to 60 days, and intensive stability tests have shown that DBS can withstand high temperatures, humidity and freeze-thawing. During the implementation of a large randomized controlled trial (RCT) in southern Africa, with HIV acquisition as the primary endpoint, we observed 65 instances when DBS samples collected from the same day as a positive HIV antibody test yielded negative DNA polymerase chain reaction (PCR) results. The source of this discrepancy may have been due to inadequate specimen volume, filter paper or DNA extraction procedures, but were most likely due to storage conditions that have been reported as acceptable in other settings.

High acceptability of a vaginal ring intended as a microbicide delivery method for HIV prevention in African women.

Vaginal rings (VRs) are new methods for continuous delivery of microbicides. This is the first study to quantitatively and qualitatively explore the acceptability of rings in Africa: 157 HIV-negative, sexually active women aged 18-35 used a placebo silicone elastomer ring for 12 weeks. They completed product acceptability questionnaires every 4 weeks. We conducted 6 exit focus group discussions with a subset of 48 women and 19 in-depth interviews with male partners. Retention in the study was high (97 %). Initial insertion at the clinic was successful on first attempt for 81 % of participants. Most women were comfortable using the ring, and very few (≤2 %) could feel it during daily activities or had ring-related physical or emotional problems. In the qualitative interviews many participants reported that they initially had concerns about using the ring. However, only a minority of women actually reported concerns with the ring during the study. The most frequent concern was that the ring would get lost inside the body (20 %), and this was significantly correlated with study site, frequently thinking about the ring and reporting that the ring was not very easy to remove. Qualitative data suggest that informants grew to like the ring because it felt securely placed, was unnoticeable during daily activities, and felt "normal" during sex. The ring appeared to be highly acceptable for women and men. Initial concerns with this novel method suggest a need for enhanced product counseling when VRs are introduced.

The relative contribution of viral and bacterial sexually transmitted infections on HIV acquisition in southern African women in the Methods for Improving Reproductive Health in Africa study.

We assess the relative contribution of viral and bacterial sexually transmitted infections (STIs) on HIV acquisition among southern African women in a nested case-control study within the Methods for Improving Reproductive Health in Africa (MIRA) trial. Cases were women with incident HIV infection; controls were HIV-uninfected at the time of case seroconversion selected in a 1 to 3 case to control ratio (risk-set sampling), matched on study site and time of follow-up. Conditional logistic regression models were used to calculate adjusted odds ratios (AORs) and population-attributable fractions (PAF). Among 4948 enrolled women, we analysed 309 cases and 927 controls. The overall HIV incidence rate was 4.0 per 100 women-years. The incidence of HIV infection was markedly higher in women who had prevalent Herpes simplex virus type 2 (HSV-2) (AOR: 2.14; 95% confidence interval [CI]: 1.55-2.96), incident HSV-2 (AOR: 4.43; 95% CI: 1.77-11.05) and incident Neisseria gonorrhoeae (AOR: 6.92; 95% CI: 3.01-15.90). The adjusted PAF of HIV incidence for prevalent HSV-2 was 29.0% (95% CI: 16.8-39.3), for incident HSV-2 2.1% (95% CI: 0.6-3.6) and for incident N. gonorrhoeae 4.1% (95% CI: 2.5-5.8). Women's greatest risk factors for HIV acquisition were incident bacterial and viral STIs. Women-centred interventions aimed at decreasing HIV incidence in young African women need to address these common co-morbid conditions.

Enhanced diapycnal mixing by salt fingers in the thermocline of the tropical Atlantic.

Diapycnal mixing plays a significant role in the ocean's circulation and uptake of heat and carbon dioxide, but has not been quantified in salt finger-driven thermohaline staircases. We recently performed a tracer release experiment in the western tropical Atlantic staircase at approximately 400 m depth. The observed dispersion implies an effective diapycnal diffusivity for tracer and salt of 0.8 to 0.9 x 10(-4) m2/s. Temperature microstructure data interpreted in terms of a vertical production-dissipation balance yields a smaller effective diffusivity for heat of 0.45 (+/- 0.2) x 10(-4) m2/s, consistent with salt fingers and well above the mixing ascribable to mechanical turbulence.

Barriers to implementing South Africa's Termination of Pregnancy Act in rural KwaZulu/Natal.

INTRODUCTION: South Africa's Termination of Pregnancy Act, the most liberal abortion law in Africa, took effect early in 1997. In spite of the anticipated benefits to women's health, however, public reaction has been mixed. In the country's most populous province, KwaZulu/Natal, opposition is strong and most health care providers have refused to provide the service. This study explored attitudes and beliefs about abortion and the Termination of Pregnancy Act among primary care nurses and community members in a rural district in order to better understand barriers to implementation of the new law. METHODS: As part of a community survey on women's reproductive health (n = 138), questions on knowledge, attitudes and beliefs about abortion were asked, as well as awareness of the provisions of the Termination of Pregnancy Act. To better understand the perspectives of health care workers, a survey among primary care nurses on duty (n = 25) was also conducted. In-depth interviews were conducted with both nurses and women in the community to further pursue issues raised in the two surveys. RESULTS: Support for the Act was low (11%) among both community members and nurses, and few supported abortion on request (18 and 6%, respectively). Within each group, however, a clear hierarchy of support was observed: a majority of nurses (56%) and community members (58%) supported abortion in the case of rape or incest, or if the continued pregnancy would endanger a woman's health (61 and 56%, respectively), but few supported abortion for social or economic reasons. In-depth interviews revealed that abortion is seen as contrary to prevailing community norms; nurses were poorly informed about the Termination of Pregnancy Act and felt confused in their professional responsibilities. CONCLUSIONS AND RECOMMENDATIONS: Legalization alone cannot ensure implementation of abortion services. In South Africa, extensive media coverage prior to passage of the law ensured almost universal awareness of the Act, but little public education took place at the same time. In spite of general opposition to the law, however, there is an encouraging level of support for abortion in some circumstances. These findings suggest that abortion services can be implemented, even in conservative rural areas, but that a process of information dissemination and community consent prior to implementation is essential. Locating abortion within broader reproductive health services could be an effective way to improve access and acceptability.