Tracking the impact of ageing in rural South Africa
- Jennifer Manne-Goehler, Chodziwadziwa Kabudula, Chodziwadziwa Kabudula and Kathleen Kahn
Rapid population ageing has prompted researchers to study disease trends in older South Africans.
Population ageing is a growing challenge worldwide, and African is no exception. The World Health Organisation estimates that the continent is home to almost years or older, and that this number will increase to over .
This rapid population ageing will certainly lead to an increase in non-communicable diseases. This, in turn, will present important challenges for countries 鈥 including South Africa 鈥 and their national health systems in the coming decades.
These health and demographic changes have prompted researchers to study disease trends in older South Africans. The aim is to understand the role that specific health conditions will play in ageing among rural people.
One of the key studies about these trends is called (HAALSI). The study is a collaboration led by researchers at the University of the Witwatersrand in Johannesburg and Harvard University in the US.
The team followed 5,059 adults over 40 years of age who live in the Bushbuckridge sub-district of Mpumalanga province in the northeast of the country. The has been running a wider project in this area for 26 years, and the is the longest running surveillance survey in Africa.
As part of the study, we interviewed older adults periodically about their health and experience of ageing, and assessed key laboratory markers and clinical measurements.
The first set of interviews was conducted between November 2014 and November 2015. Our team recently returned to the homes of these same people to follow-up on how their health has changed. We鈥檝e already several key health trends. For example, diseases beyond HIV and tuberculosis (TB), such as heart disease and diabetes, are beginning to affect peoples鈥檚 health. We have also been able to track how growing older affects peoples鈥 ability to function both physically and mentally.
Health threats
For many years, HIV and TB have been central health worries for South Africans of every age. But, thanks in part to the success of South Africa鈥檚 national HIV treatment programme, people taking antiretroviral therapy are living longer.
Our research on ageing and health shows that while HIV and TB remain important, even in older ages, other age-related conditions such as obesity, heart disease, diabetes and cognitive impairment also play an increasingly important role in the function and quality of life in older people.
For instance, HAALSI has found that as many as two out of every three South African women, and one out of every two men are overweight or obese. Our additional found that more than half of people over 40 have high blood pressure, and one in every ten has diabetes. The rates of these major cardiovascular risk factors are about the same in people who are HIV positive and those who do not have HIV infection.
Analysis of multi-morbidity in the HAALSI study more than half of older people were found to have at least two of ten common health conditions at the same time. This is known as 鈥渕ultimorbidity鈥 and has been linked to poorer overall functioning as people age.
In addition to heart disease, is another important age-related condition that older South Africans are facing in increasing numbers. HAALSI has shown that one in four adults over 75 years old has cognitive impairment, or difficulties with memory, thinking and judgement, that can affect their daily lives. Even more importantly, many of these people report that this decline limits their ability to perform usual activities at home.
Finally, half of older adults with who need assistance with such activities do not receive the help they need.
Older people also still face a high risk of HIV infection and the challenges associated with HIV treatment. Nearly . Many older adults, including many of those who do not have HIV, report that they do not use condoms, despite moderate levels of casual sex and multiple concurrent partnerships. Among those who have HIV, almost 70% were taking antiretroviral therapy and the majority of these people were virally suppressed. Despite this relatively high treatment uptake, only half of people with HIV were willing to disclose their HIV status in these interviews.
What needs to be done
For one, it is important for the government to have information about these diseases so policymakers can develop strategies to take care of people as they age.
Interestingly, our has also found that people who were participating in the national HIV treatment programme were more likely to receive care for high blood pressure and achieve control of both blood pressure and blood sugar. This finding suggests that strong primary care systems are an important part of the answer to the disease trends of older adults, and also that South Africa鈥檚 very successful national HIV treatment programme may offer a great platform for expanding primary care for all South Africans.
Lastly, it鈥檚 important for people to be aware of the diseases that may affect them when they are older and to prepare for how they will deal with these possible problems. Good health habits formed in childhood and in young adulthood 鈥 including avoiding smoking and alcohol overuse, engaging in physical activity and eating a nutritious diet 鈥 will be crucial to healthy ageing of the society of a whole.
, Research Fellow in Medicine, ; , Senior Researcher Rural Health in Transition and Agincourt Research Unit, ; , Research Manager at MRC/杨贵妃传媒 Agincourt Research Unit, , and , Professor: Health and Population Division, School of Public Health, . This article is republished from under a Creative Commons license. Read the .