Reviews

Care of the aging HIV patient

Author and Disclosure Information

ABSTRACTThanks to antiretroviral therapy, human immunodeficiency virus (HIV) infection has become a controllable chronic disease, and many infected patients are now living into their 60s and beyond. In addition, many patients with newly diagnosed HIV infection are over age 50. The subsequent rising prevalence of HIV infection in older adults presents several challenges for primary care clinicians. This article promotes increased HIV screening in older adults and highlights the need to recognize polypharmacy and the various comorbidities inherent in the aging HIV population.

KEY POINTS

  • Today, nearly 20% of newly diagnosed HIV-infected people and more than 50% of all HIV-infected people in the United States are over age 50.
  • The diagnosis and treatment of HIV tends to be delayed in elderly patients, with deleterious effects.
  • Antiretroviral drugs have a number of interactions with drugs commonly used in elderly patients.
  • Several diseases are more common in HIV-positive patients, including cardiovascular disease, diabetes mellitus, osteoporosis, dementia, and various malignant diseases. These merit aggressive screening and preventive measures.


 

References

In the 1980s, human immunodeficiency virus (HIV) infection was considered untreatable and predictably lethal. Today, with highly effective antiretroviral therapy, it has become a chronic condition in which patients have a life expectancy comparable to that in the general population.

This change has led to new challenges for primary care physicians, many of whom now find themselves either the sole medical provider for or the comanager of aging HIV-infected patients. Given that about one-fifth of new HIV diagnoses are now in people over the age of 50, it is crucial that primary care providers be able to recognize and diagnose the disease in this population. In addition, they need to effectively manage the polypharmacy and subsequent drug interactions prevalent in older HIV-infected patients. Finally, the clinician must address comorbid diseases common in the elderly, specifically neurologic, cardiovascular, metabolic, and endocrine disorders, as well as performing routine cancer screening.

Take-home point

  • As the number of people age 50 and older with HIV infection increases, primary care providers must be able to both recognize and manage the condition.

RISING PREVALENCE OF HIV IN THE ELDERLY

Globally, about 2.5 million people received a new diagnosis of HIV infection in 2011, and about 35 million people worldwide are currently living with it.1 An estimated 1.1 million Americans are living with HIV, and of these, about 16% do not know they are infected.2

HIV patients who adhere to treatment and achieve a CD4 count above 350 and a low viral load have a normal life expectancy

Antiretroviral therapy has greatly improved the life expectancy of HIV-infected patients, and the number of HIV-infected people over age 50 continues to rise. A successfully treated HIV-positive person with a CD4 count higher than 350 × 106/L and a suppressed viral load now has a normal life expectancy.3 In 2011, nearly 20% of newly diagnosed HIV-infected people in the United States were over age 50, as were nearly 25% of those with a new diagnosis of acquired immune deficiency syndrome (AIDS).4 This year (2015), we expect that more than half of all HIV-infected people in the United States will be over age 50.5

The rising prevalence of HIV infection in this age group has prompted reevaluation of screening guidelines. The US Preventive Services Task Force recommends screening for HIV in all people ages 15 to 65, and also after age 65 in people at ongoing risk of infection.6 The American College of Physicians has suggested that the range for routine HIV screening be expanded to age 75.7 The cost-effectiveness of expanded and more frequent HIV testing appears to justify it.8

Take-home points

  • An HIV-infected patient who is compliant with an appropriate antiretroviral regimen and has a CD4 count higher than 350 × 106/L and a suppressed viral load now has a normal life expectancy.
  • Today, nearly 20% of newly diagnosed HIV-infected people and more than 50% of all HIV-infected people in the United States are over the age of 50.
  • The age range for routine screening for HIV infection should be expanded.

HIGH-RISK GROUPS AMONG THE ELDERLY

Early in the HIV epidemic, older patients acquired HIV from blood transfusions received because of hemophilia and other disorders. However, this rapidly ceased after blood banks began screening blood products. Today, people over age 50 who acquire HIV have many of the same risk factors as younger people.

Men who have sex with men are the largest subgroup of HIV-infected people in the United States, even among those over age 50. In particular, white men who have sex with men now constitute the largest demographic group among the HIV-infected elderly.4

Intravenous drug users make up about 15% of older people with HIV.

Women who have sex with infected men or with men at risk of HIV infection make up the largest group of older women with HIV.4

Sex and the older person

Many older HIV-infected people remain sexually active and continue to engage in unprotected sexual intercourse far into advanced age. According to one survey, 53% of Americans ages 65 to 74 are engaging in sexual activity regularly; however, they are not using protective measures with up to 91% of casual partners and 70% of new partners.9,10 Many widowed and divorced people are dating again, and they may be unfamiliar with condom use or may be reluctant to use condoms because condoms can often make it difficult to maintain an erection.

Drugs for erectile dysfunction are making it easier for the elderly to engage in both vaginal and anal intercourse, but often without a condom.9 Older women who no longer worry about getting pregnant may be less likely to insist their partners use a condom and to practice safe sex. In addition, age-related thinning and dryness can cause vaginal tears, increasing the risk of HIV transmission.11

Take-home points

  • People older than 50 have risk factors for HIV similar to those in younger people.
  • Men who have sex with men compose the largest group of HIV-infected individuals in the elderly population.
  • Unprotected sexual intercourse is common in the elderly for several reasons: unfamiliarity with condom use, difficulty maintaining an erection, lack of concern about possible pregnancy, and vaginal thinning and dryness in women.

UNDERDIAGNOSIS AND LATE DIAGNOSIS IN THE ELDERLY

The cumulative number of AIDS cases in adults age 50 and older increased nearly ninefold from 1990 to the end of 2009. Even more worrisome, one-half of HIV-positive adults over age 50 are diagnosed with AIDS simultaneously or within 1 year of their HIV diagnosis.4 This late diagnosis—and therefore late initiation of treatment—is associated with poorer health outcomes and more rapid disease progression.12

HIV infection in older adults often goes undiagnosed, for several reasons.

Providers may underestimate the risk in this population and therefore may not discuss HIV transmission or perform testing. Despite a US Centers for Disease Control and Prevention recommendation that people ages 13 to 64 be tested at least once, and more often if sexually active, only 35% of adults ages 45 to 64 have ever been tested for HIV infection.13

Age greater than 50 has been strongly associated with higher rates of non–AIDS-related cancers and cardiovascular disease

Older patients may not perceive themselves to be at risk of HIV infection because of lack of insight and information about its prevention and transmission. They are also less likely than younger adults to discuss their sexual habits or drug use with providers.14 In addition, compared with the young sexually active population, very little HIV prevention education is targeted to older people.15 Social stigmatization is also a concern for many HIV-infected elderly, as a perceived negative reputation within their community may prevent them from seeking care and disclosing their HIV status.

Take-home points

Reasons that HIV infection is underdiagnosed in the elderly include lack of:

  • Provider recognition
  • Insight and information about HIV prevention and transmission
  • HIV-prevention education targeting the elderly
  • Disclosure because of the social stigma of HIV infection.

HIV ACCELERATES AGING, AGING REDUCES IMMUNITY

Many HIV-positive people can expect to live as long as people in the general population, but those who are diagnosed late and thus are started on antiretroviral therapy later in the course of their infection have a reduced life expectancy. Longevity depends on both restoring the CD4 count to near-normal and suppressing the viral load to undetectable levels.3,16 This is especially important for older adults, as HIV may accelerate aging, and aging itself may speed the progression of HIV disease, so that therapy may result in delayed or only partial restoration of immunity.

Older age at the time of HIV infection is a strong predictor of accelerated HIV disease progression in the absence of therapy.17 Left untreated, older patients with HIV lose CD4 cells and progress to AIDS and death faster than younger patients. The deleterious effects of chronic immune activation in the course of HIV infection, combined with the immune senescence of aging, are thought to promote this accelerated course.18

Recent data indicate that starting antiretroviral therapy early can help prevent the CD4-cell impairment that occurs with aging.19 However, in adults over age 50, the capacity to restore the CD4 count with antiretroviral therapy apears to be reduced, despite demonstrated viral load suppression and better adherence.20 Although mean adherence rates appear higher in older HIV-infected patients, they are worse in those with neurocognitive impairment, highlighting the importance of evaluating neurocognition in this population.21

Decreased immune recovery and the subsequent increased risk of serious AIDS events are factors that now favor starting antiretroviral therapy in all HIV patients over age 50, regardless of CD4 count.

Take-home points

  • Without treatment, HIV infection in older patients progresses more rapidly to AIDS and death than in younger patients.
  • HIV-positive people over age 50 who have never received antiretroviral therapy should be strongly considered for it, regardless of the CD4 count.

Pages

Next Article:

Related Articles