Due to improvements in AIDS drugs known as antiretroviral therapy, life expectancy for young HIV-positive adults has risen by 10 years in the United States and Europe.
This meant many patients can expect to live as long as those without HIV, according to their study published in The Lancet medical journal.
The scientists said the improvements were likely to be largely due to the transition to less toxic medicine combinations, with more drug options for people infected with drug-resistant HIV strains, and better adherence to treatment.
Antiretroviral therapy, or ART, first became widely used in the mid 1990s. It involves a combination of three or more drugs that block the HIV virus’ replication. This helps prevent and repair damage to the immune system caused by the HIV, and also prevents onward spread of the disease.
The World Health Organisation (WHO) now recommends ART should be given as soon as possible after diagnosis to everyone with HIV.
The researchers analysed 18 European and North American studies involving 88,504 people with HIV who started ART between 1996 and 2010.
Fewer people who started treatment between 2008-2010 died during their first three years of treatment than those who started treatment between 1996-2007.
Trickey’s team said when they looked specifically at deaths due to AIDS, the number during treatment declined over time between 1996 and 2010, probably because more modern drugs are more effective in restoring the immune system.
This suggests that life expectancy of a 20-year-old who began ART from 2008 onwards and responded well to it would get close to a life expectancy of the general population – 78 years.
But the improvements were not seen in all people with HIV. Life expectancy of those infected through injecting drugs, for example, did not increase as much as in other groups.
Mr Trickey said this underlined the need for prevention and treatment efforts to be focused on high-risk groups.