While the ageing of society has become one of the givens in today’s world, less is made of the lived experience of the very elderly in society.

And although there is some suggestion that the much trumpeted steady expansion of the human lifespan has begun to slow down, the numbers of very old people continue to grow.

Despite this, debates about the resourcing of universal health and social care tend not to examine the costs associated with extreme ageing.

Yet the problem of chronic conditions and multiple morbidity is greatest among octogenarians and nonagenarians.

Very old age, if commented upon, is presented as if it were a kind of extreme sports competition. Centenarians are celebrated simply for reaching 100. Nonagenarians hit the news when they run a mile, climb a mountain or pilot a plane. Otherwise, silence reigns.

Yet the focus of most social care is on people aged 80 and over – a group for whom care is needed because health cures have failed them. The morbidities and infirmities that beset the extremely aged are not so much ignored as abandoned to the efforts of medical services and social care.

One study of 85-year-olds found a median number of five diseases per person (Shutterstock)

At UCL, we are trying to throw some light on this darker side of ageing. There are of course a number of ways that such “hyper-ageing” can be approached and understood. One view celebrates the fact that the more and more people can expect to live for 100 years or more.

Another sees it as an apocalyptic disaster, as agedness “swamps” the resources of society needed to maintain itself. Yet another view juggles between the successes of more years of healthy active life and the failings of more years of living with disability and infirmity.

Across the world, the burden of disease has been receding. But this is more the case for illnesses affecting younger people and those that are likely to lead to death, rather than disablement.

By contrast, conditions that are degenerative and disabling more often than causing death remain largely unchanged.

Rates of osteoarthritis, for example, which disables but does not kill you, have been rising over the last 25 years (from 213.4 cases per 100,000 in 1990 to 232.1 cases per 100,000 in 2016).

Rates for Alzheimer’s disease, which disables more than it causes death, have also grown but in a less pronounced manner, (rising from 460.9 cases per 100,000 in 1990 to 470.6 cases per 100,000 in 2016).

Although some chronic conditions affecting older people, such as chronic obstructive pulmonary disease, which kills and disables you, have been falling (from 1,666.8 cases per 100,000 in 1990 to 945.3 cases per 100,000 in 2016).

NHS at 70: Pride and worry as free health service celebrates birthday Show all 18 1 /18 NHS at 70: Pride and worry as free health service celebrates birthday NHS at 70: Pride and worry as free health service celebrates birthday Nurses test the hearing of a newborn child Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday The waiting room is busy in Milton Keynes University Hospital Reuters NHS at 70: Pride and worry as free health service celebrates birthday On Ward 24, two nurses work at the nurses station Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday In A&E, a porter rushes a patient through the corridor Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday A surgical team prepares a patient for their operation Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday In the physiotherapy department, patients are treated in the hydrotherapy pool Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday On Ward 8, an inpatient awaits visitors Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday In the physiotherapy department, amputees take a class Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday A junior doctor is at work in the staff room Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday A surgical team prepares a patient for their operation Reuters NHS at 70: Pride and worry as free health service celebrates birthday An inpatient has her hair washed by the staff hairdressers Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday In the audiology department, a mother watches on as her son is given a hearing test Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday On Ward 8, staff serve lunch to the patients Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday On Ward 24, a patient waits on their bed Reuters NHS at 70: Pride and worry as free health service celebrates birthday On Ward 8, a cleaner is at work Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday A nurse takes blood from a patient Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday On Ward 8, an inpatient receives a visitor Reuters/Hannah McKay NHS at 70: Pride and worry as free health service celebrates birthday Inpatient Donald Ritson lies in bed in Ward 24 in Milton Keynes University Hospital Reuters

The really large falls in disease prevalence have been in conditions affecting the young, such as cases of diarrhoea and related common infectious diseases, which have dropped remarkably, from 8,951.2 in 1990 to 3,275.6 in 2016.

In Denmark, one of the few national surveys of nonagenarians was conducted around the turn of this century. The researchers found that the majority contacted had some disability and that women were more often affected than men.

The same researchers also observed that “about 10 per cent of the octogenarians and more than 55 per cent of the centenarians live in nursing homes, while dependency rises from approximately 30 per cent to 70 per cent, and the prevalence of dementia rises from approximately 7 per cent to 50 per cent”.

In the UK, one study of 85-year-olds found a median number of five diseases per person, with more than half suffering from hearing impairment, just over half from osteoarthritis, and just under half suffering from high blood pressure. Just under a quarter had some form of cancer. Less than 5 per cent told the researchers that their health was poor: most said it was good.

This last point emphasises how extreme ageing presents issues that easily go unremarked upon. Its problems are largely confined within the individual household or in long-term care institutions.

Wider society scarcely acknowledges these problems and most of those on the receiving end, whether carers or people being cared for, are simply too overwhelmed to do much about them.

The social networks of the frail elderly tend to be so much smaller than those of the rest of the population (Shutterstock)

Although not closed off to the public, the nursing home remains more present in the imagination than in most people’s everyday experience. The social networks of the frail elderly, whether living at home or in a nursing home, tend to be so much smaller than those of the rest of the population.

Most people over 80 live alone. They often have only a few people to talk with. Meantime, stories of abuse, or TV footage of the inside of the nursing home paint a grim picture to all who watch, read or hear them.

The isolation and neglect of these spaces help preserve the distance between an “us” who are, if we are ageing, ageing well clear of such scenarios, and a “them”, who are not. To be old and frail is not an identity to be acclaimed and the old and frail are generally unable or unwilling to represent themselves as such.

For many of these people, life can be difficult. Estimates suggest that chronic pain “in people aged 85 years or older is common”, affecting the majority of people from this age group.

Aged lives of quiet desperation are sadly not rare, nor are most lived in the heroic terms of the marathon-running nonagenarian that hits the news.

In drawing attention to this, we are not attempting to promote further victimhood. What we hope to achieve is to cast a little light upon the darker side of our ageing and of our ageing societies.

Old age should not be sought out just for the sake of it.