longevity in australia: prospects and implications€¦ · shows which diseases contributed to the...
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Longevity in Australia: prospects and implications
Heather BoothAustralian National University
2nd International Living to 100 Conference7-8 September 2018, Sydney
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LONGEVITY IS INCREASING
…and there is no end in sight
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Observed maximum female life expectancy
Oeppen and Vaupel (2002)
Japan 201687.2 years
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Australian life expectancy 1921-2014
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Female
Male
How is the linear increase achieved?
84.6
80.4
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How mortality declines
The largest decline occursat different ages at different times
Australian female death rates 1921-2014
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Changing age pattern of mortality decline maintains increasing life expectancy
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How is the linear increase in e(0) achieved?
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Changing age pattern due to disease patterns
7Shows which diseases contributed to the increase in female life expectancy over last 30 years
Warning:
The negative contribution of “mental/nervous system diseases” or dementia is an artefact of data collection.
Nevertheless the graph shows the current contribution of dementia deaths and hence the amount by which life expectancy might be increased if dementia were reduced to zero (about 0.5 year).
Total net increase = 6.1 years
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PROSPECTS FOR LONGEVITY IN AUSTRALIA
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Coherent* mortality forecast, Australia 2015-2044
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89.4 in 204486.1 in 2044
Range = 80% probability interval
*Product-ratio coherent method using data for 1970-2014. Male and female forecasts never converge or diverge. See Hyndman, Booth & Yasmeen (2013). Demography, 50(1), pp.261-283
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Improving survival: cohort exceeds period
Period life expectancy Cohort life expectancy
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23.8
Expected age at death at age 6565 + 22.0 = 87.0
Expected age at death at age 65 65 + 23.8 = 88.8
Female born 1945 = aged 65 in 2010
22.0
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Expected age at death for cohorts by age in 2010
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Younger cohorts have higher expected age at death Expected age at death increases with own age
Forecasts by Tickle and Booth (2014)
….. the longer you live
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Modal age at death is increasing: relatively more deaths occur at very old ages
40% of deaths now occur at ages 85+ 12
Dying as a nonagenarian becomes more and more ‘certain’
How long do we really live?
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Greater concentration (compression)
Mode moves to older ages
Extension of the lifespan…
The extension of the lifespan
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THE PROSPECT OF A CENTURY
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At birth:Females 6 in 100Males 3 in 100
What are our chances?What are our chances?
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At birth:Females 6 in 100Males 3 in 100
At 80:Females 8 in 100Males 4 in 100
At 90:Females 13 in 100Males 9 in 100
What are our chances?What are our chances?
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At birth:Females 6 in 100Males 3 in 100
At 80:Females 8 in 100Males 4 in 100
At 90:Females 13 in 100Males 9 in 100
At 95:Females 26 in 100Males 21 in 100
At 99:Females 72 in 100Males 69 in 100
What are our chances?What are our chances?
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Survival to 100 now depends on oldest ages
This point is fixed
This point has to be lowest
Increase occurs here
Mortality up to age 60 is already too low to make a noticeable difference
What are our chances?
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The prospect of the century advancesCohort survival to 100
Females born in 2013 have 16% probabilityMales born in 2013 have10% probability
16%10%
10%
16%
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IMPLICATIONS OF INCREASING LONGEVITY
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A LONG RETIREMENTIMPLICATIONS
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More people spend longer in retirement
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Age at retirement
Most people live 20+ years in retirement
Age at retirement
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Pension age in Australia
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1908 1911 1994….2013 2017….202465 60 60….65 65….67
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On average, ‘we’ can expect more than 20 years in ‘retirement’
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After ‘retirement’, females can expect to live 24 years
and males 21 years in 2017
On average, half of us will
live longer
These estimates are conservative:
cohort life expectancy is higher
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GROWING NUMBERS OF CENTENARIANS
IMPLICATIONS
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Future numbers of centenarians
By 2050:
39400
20000
59400
66%
34%
By 2014:
2890
610
3500
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AN OLDER POPULATION STRUCTUREIMPLICATIONS
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An older population structure is embodied in current mortality
An even older population
is embodied in declining
mortality
This is independent of the effect of age structure –which is ‘temporary’
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LONGEVITY AND SOCIETYIMPLICATIONS
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Health and well-being
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• Health needs of very old people– Different mix of diseases (dementia)
• Needs of the ‘healthy frail’ and disabled– Age-Friendly Cities and Communities:
Infrastructure/Health/Social – Universal design
• Ageing in the community – Independence and social connectedness
• Challenges for society as a whole
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A NEED TO CHANGE ATTITUDES IMPLICATIONS
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“See, the problem with doing things to prolong your life ….
….is that all the extra years come at the end, when you’re old”
Negative attitudes to living longer
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The prospect of a century?Most people do not want to live to 100
They think of ill-health and disability….
Our ideas of old age are out-dated• formed in childhood• not keeping up with ongoing changes…..• not changing behaviour re longevity
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An alternative view….?
Plan for the century!
An expanded future timeperspective
…back to the past!