HIV risk-taking behaviour by older adults in SA

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Older adults are sexually active and report risk behaviors that are consistent with HIV transmission, found a Mpumalanga, South Africa, study.

One of the most common myths around older adults is that they are not sexually active. But a recent study conducted by researchers at Indiana University found that older men and women do maintain sexual relationships even into their 80s and beyond. Since older adults are often ignored in sexual health education, the possibility for HIV transmission is heightened.

The study, conducted by Molly Rosenberg, assistant professor of epidemiology and biostatics in the IU School of Public Health-Bloomington, looked at the unmet needs for HIV prevention among older adults in sub-Saharan Africa, one of the first studies of its kind to report sexual risk-taking among older adults in that region.

“Our study found that older adults are sexually active, and they report sexual risk behaviors – low condom use, casual sex and multiple recent partners – that are consistent with sexual transmission of disease,” Rosenberg said. “This marks a huge potential for ongoing HIV transmission in older South Africans, and highlights the need for expanded HIV testing and counseling that can change behavior and help reduce new HIV transmission.”

Researchers analysed data from 5,059 men and women age 40 and older from the study “Health and Aging in Africa: Longitudinal Studies of INDEPTH Communities,” conducted in rural Mpumalanga province in South Africa. Of those enrolled, 46% were men, 51% were currently married, and 46% had no formal education. The research looked at HIV prevalence, described their sexual behaviors and compared those behaviors across HIV status categories, using both self-reported and laboratory-confirmed HIV status data.

Older adults receive little attention when it comes to HIV prevention research and interventions, although growing evidence shows they make up a fast-increasing proportion of people living with HIV, in part because of the impact of large-scale HIV treatment on reducing deaths from the disease. Research on the group remains scarce, however, especially in sub-Saharan Africa, where most of the world’s 37m people infected with HIV live, and prevention measures focus mostly on younger adults.

“This is really the first generation of South Africans we’ve seen aging with HIV,” Rosenberg said.

Overall, HIV prevalence among people in the study was high, at 23%, and did not differ between men and women. About one-third of respondents reported never having been tested for HIV, and among those with confirmed infections, nearly half did not yet know they were living with HIV.

Regarding sexual activity, more than half of participants reported at least one sex partner within the past two years. Men tended to maintain sexual partnerships at relatively high rates across older ages, only dropping to 52% at age 80 and older. The proportion of women with recent sexual partners decreased more steeply with age, dropping to 6% at age 80 and older.

Individuals who reported condom use decreased with age in both men and women, as did those reporting casual or anonymous sex. Condom use was highest, at 75%, among those who were HIV positive, but only if they knew their status. Of those who were HIV positive but unaware of their status, only 27% regularly used condoms.

One in 10 participants also reported that their most recent sex partners were casual or anonymous. Casual sex was lowest among HIV-negative adults, at 9%, and higher among both HIV-positive groups (29% of those aware of their HIV status and 18% of those who were unaware). The results, Rosenberg said, show not only a commonality among sexually active young people and older people, but also the need for targeted intervention among older adults.

The study calls for inclusion of older adults in HIV prevention, with messages created directly for that demographic, and intensified counseling and motivation about sexual transmission risk and universal HIV testing.

“To control the HIV epidemic in South Africa, we need to reach everyone who is vulnerable to HIV,” Rosenberg said. “And our paper shows that older adults should clearly be considered as HIV-vulnerable.”

Abstract
Objective: To identify the unmet needs for HIV prevention among older adults in rural South Africa.
Methods: We analyzed data from a population-based sample of 5059 men and women aged 40 years and older from the study Health and Aging in Africa: Longitudinal Studies of INDEPTH Communities (HAALSI), which was carried out in the Agincourt health and sociodemographic surveillance system in the Mpumalanga province of South Africa. We estimated the prevalence of HIV (laboratory-confirmed and self-reported) and key sexual behaviors by age and sex. We compared sexual behavior profiles across HIV status categories with and without age–sex standardization.
Results: HIV prevalence was very high among HAALSI participants (23%, 95% confidence interval [CI]: 21 to 24), with no sex differences. Recent sexual activity was common (56%, 95% CI: 55 to 58) across all HIV status categories. Condom use was low among HIV-negative adults (15%, 95% CI: 14 to 17), higher among HIV-positive adults who were unaware of their HIV status (27%, 95% CI: 22 to 33), and dramatically higher among HIV-positive adults who were aware of their status (75%, 95% CI: 70 to 80). Casual sex and multiple partnerships were reported at moderate levels, with slightly higher estimates among HIV-positive compared to HIV-negative adults. Differences by HIV status remained after age–sex standardization.
Conclusions: Older HIV-positive adults in an HIV hyperendemic community of rural South Africa report sexual behaviors consistent with high HIV transmission risk. Older HIV-negative adults report sexual behaviors consistent with high HIV acquisition risk. Prevention initiatives tailored to the particular prevention needs of older adults are urgently needed to reduce HIV risk in this and similar communities in sub-Saharan Africa.

Authors
Rosenberg, Molly S; Gómez-Olivé, Francesc X; Rohr, Julia K; Houle, Brian C; Kabudula, Chodziwadziwa W; Wagner, Ryan G; Salomon, Joshua A; Kahn, Kathleen; Berkman, Lisa F; Tollman, Stephen M; Bärnighausen, Till

University of Indiana material
Journal of Acquired Immune Deficiency Syndromes abstract


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