WHO guidance highlights dementia risk for older Australians

The World Health Organisation has identified social isolation as one of the leading modifiable risk factors for dementia. Its new guidance says nearly half of dementia cases may be preventable through lifestyle changes.

The WHO placed loneliness and social isolation alongside physical inactivity, hearing loss and depression. The guidance was released in July 2026.

Some studies cited in the briefing compare chronic loneliness to smoking 15 cigarettes a day. That research adds to a wider body of evidence linking social disconnection with cognitive decline.

In Australia, Probus says the findings should act as a wake-up call for retirees and semi-retirees. The network has more than 90,000 members across more than 1,300 local clubs.

Probus South Pacific

Silvana Martignago, CEO of Probus South Pacific, said, “The science is clear and it keeps getting clearer. Social isolation is one of the most significant and preventable risks to our health as we age.”

Martignago also said the WHO findings match what Probus has seen over 50 years. Probus clubs operate across all Australian states and territories.

By the early 2060s, the number of Australians aged 65 and over is projected to more than double. That group is expected to make up close to one quarter of the total population.

At the same time, rates of loneliness and isolation among older Australians are rising. Those trends already have significant impacts on the health system.

Probus clubs offer a low-barrier entry point to regular social connection. Clubs meet monthly and also run outings, shared meals, guest speakers and interest groups.

Membership is open to anyone at or approaching retirement. As a result, retirees can join local groups built around regular contact and shared interests.

Martignago said regular social connection, people to turn to and somewhere to go each week can support long-term health and brain health. She said, “Social connection is not a luxury. It is essential.”

Probus says many members report clear benefits after joining a club. Some members have told Martignago they wished they had joined sooner.