argues that improved nutrition accounts for up to 1/2 the reduction in death rates
better nutrition increases resistance to infection, and therefore increases rates of survival
McKeown does not explain why females who receive a smaller share of the family food supply lived longer than males
he fails to explain why deaths from some infectious diseases such as measles actually rose at a time of improving nutrition
medical improvements
before 1950 medical improvements played no part in the reduction of deaths from infectious diseases
from the 1950s improved medical knowledge, techniques and organisation helped reduce death rates
Advances include blood transfusions, improved maternity services, and the NHS being set up in 1948
In recent times, by-pass surgeries have reduced heart diseased deaths by 1/3
smoking and diet
according to Harper the greatest fall in death rates has not come from medical improvements but due to a reduction in the number of people smoking
in the 21st centuryobesity has replaced smoking as the new lifestyle epidemic
yet although obesity has risen deaths from obesity have been kept low as a result of drug therapies
Harper suggests that we may be moving to an American' health culture where lifestyles are unhealthy, but costly medications keep the lifespan long
public health measures
in the 20th century more effective and more local government with the necessary power to pass and enforce laws led to a range of improvements in public health and the quality of the environment
included improvements in housing (less overcrowded), purer drinking water, improved sewage disposal methods
similarly the clean air act reduced air pollution reducing death rates
other social changes
the decline in dangerous manual occupations such as mining
smaller families reduced the rate of transmission of infection
greater public knowledge of the causes of illness
lifestyle changes e.g. reduction of the number of people who smoke
higher incomes allowing for a healthier lifestyle
life expectancy
life expectancy relates to how long on average a person born in a given year is expected to live
as death rates have fallen life expectancy has increased
one reason for lower average life expectancy in 1900 was the fact so many infants and children did not survive beyond the ears years of life
class gender and regional differences
despite the overall reduction in the death rate and the increase in life expectancy over the last 100 years there are still important class, gender and regional differences
e.g. women generally live longer than men
according to Walker 2011 those living in the poorest areas in England die on average 7 years earlier than those in the richest area