You asked
I would like to make a freedom of information request to find out if there is any statistical evidence that shows that women born in the year 1954 have a significantly greater life expectancy/healthy life expectancy than those born in the year 1950. If so, on average, what is the gap in life expectancy/healthy life expectancy between these 2 groups?
If no significant difference in the above groups, is there any difference for women born 1948-1952 compared to women born 1953-1957? Again, if so, on average, what is the gap in life expectancy/healthy life expectancy between these 2 groups?
We said
The Office for National Statistics (ONS) does not produce healthy life expectancy life tables by year of birth for the year and periods requested as there are no available health prevalence rates. ONS has published healthy life expectancy statistics only from 1981 onwards. ONS could provide estimates of health expectancies for female survivors to these ages for the latest period available 2009 to 11 aged 60 and age 55 centred on 2010, but this would not be an accurate portrayal of health expectancy at birth in 1950 and 1954 as it would exclude the individuals health experiences and risks over the intervening period.
However, life expectancy estimation is available for the single years of birth as indicated but confidence intervals and measures of statistical significance are not calculated for these years, so it is not possible to infer whether longevity is significantly greater for one year of birth compared with another. The average life expectancy for a baby girl born (and living their entire life in England and Wales) in 1950 was 83.1 years and in 1954 was 84.0 years. This is based on the mortality in the year of birth and in each year following including assumptions about possible future improvements in mortality according to the 2012-based national projections, that is, cohort life expectancy.
ONS does not produce life tables for groups of years for this period of time, however you can access any life table for any year, on a period or cohort basis from this England and Wales life table template published on the ONS website. Full instructions on how to use the template are included in the worksheet.