SPECIFIC AIMS
Adherence to HIV treatment recommendations—including adherence to both antiretroviral therapy (ART) and
HIV care visits—is essential for persons living with HIV (PLHIV) to achieve health, longevity, and an
undetectable viral load. Yet, only 20-25% of PLHIV in the United States (US) are virally suppressed.
1
Even
among PLHIV who are followed regularly in interval cohort studies, ART adherence varies and is inadequate,
especially in certain disadvantaged sub-groups, including women.
2,3
There is evidence that HIV-infected
women may have worse adherence to ART than men,
3
and higher morbidity and mortality.
4,5
Women of color
are at particularly high risk of acquiring HIV,
6
and have worse health outcomes once infected compared to
White women.
7
Southern states in the US have the highest rates of new infections, particularly among Black,
female, and poor populations, and the highest HIV case-fatality rates in the country.
8-10
There is an urgent need
to identify barriers to engagement in care and to ART adherence among women living with HIV, particularly
among minority women from diverse geographic regions of the country, in order to understand existing health
disparities and develop responsive interventions.
One potentially important barrier to adherence to HIV treatment recommendations is HIV-related stigma.
Studies suggest that stigma and discrimination not only threaten quality of life for PLHIV, but also impede ART
adherence and engagement in care. Specifically, research has found that persons who perceive high levels of
HIV-related stigma have lower acceptance of HIV testing,
11
lower access to medical care,
12
poorer ART
adherence,
13
and lower utilization of HIV care.
14
However, there is need for further studies to determine the
magnitude of these effects longitudinally, to identify environmental factors that may underlie geographic
differences in these associations, and to elucidate temporal relationships to provide further evidence for
causality. There are also limited longitudinal data on links between HIV stigma and immunologic and virologic
outcomes—key consequences of poor adherence to HIV treatment recommendations. Furthermore, there are
notable gaps in the literature on the roles of specific dimensions of stigma, as well as the interpersonal,
psychological, mental health, and biological mechanisms that may explain the observed relationships.
15
There
are also indications that stigma may directly affect health through pathways other than treatment adherence–
via chronic activation of stress-responsive biological systems.
16
Finally, only a few studies have examined the
intersection of HIV-related stigma with other forms of stigma and discrimination due to race, gender, socio-
economic status, and other factors, which may exacerbate the effects of HIV-related stigma.
17,18
While these
issues are particularly salient for minority women in the US, there are limited data examining the roles of HIV-
related stigma and other intersecting stigmas in adherence and clinical outcomes for this population.
To address these gaps in knowledge, we will leverage the resources of the national Women’s Interagency HIV
Study (WIHS), which has been collecting data on HIV-infected women’s treatment adherence, mental health,
and immunologic and virologic outcomes for 20 years. In 2013, WIHS added new sites from the Southern US
in response to shifts in the HIV epidemic. We have recently collaborated to add brief measures of internalized
stigma and serostatus disclosure to national WIHS data collection, and the proposed study will enable us to
fund the continuation of those measures in order to establish longitudinal effects (n=2100). We also propose a
yearly supplementary visit at 3 WIHS sites (n=500) representing different parts of the country—California (San
Francisco), the Deep South (Alabama/Mississippi), and the Southeast (Georgia)—to collect additional
measures of theoretically important dimensions of stigma (anticipated, experienced, community), validated
measures of hypothesized interpersonal, psychological, and mental health mechanisms, measures of other
intersecting stigmas and discrimination (due to race, gender, and socio-economic status), as well as hair
samples for assessment of cortisol (a biomarker for chronic stress). We propose the following specific aims:
AIM 1) To elucidate longitudinal associations between internalized HIV-related stigma, women’s adherence
to HIV treatment recommendations, and corresponding immunologic and virologic outcomes in the entire
national WIHS cohort, and to examine factors underlying geographic differences in these associations.
AIM 2) To examine the effects of additional dimensions of HIV-related stigma (experienced, anticipated, and
community) on adherence and HIV clinical outcomes, and to elucidate potential interpersonal, psychological,
mental health, and biological mediating mechanisms in the relationships between dimensions of stigma,
adherence, and HIV outcomes, using additional quantitative longitudinal data collected at 3 WIHS sites.
AIM 3) To examine the link between intersectional stigma—including stigma related to HIV, race/ethnicity,
poverty, and gender—and adherence to HIV treatment recommendations using mixed methods research.
The findings from this study will have important theoretical implications for the field of stigma research and will
provide crucial information for policy and programs aiming to improve outcomes for women living with HIV.
Knowledge about the effects of specific dimensions of stigma, the mechanisms for those effects, and
intersectional stigma can be used to tailor interventions to maximize benefits for adherence and health.