Sorry, I am just a pickety person who studied statistics. jane ainsworth is right, just showing that two sets of statistics go in the same or opposite directions does not mean that there is a link between them. For example meat consumption in the USA has gone up in the last 100 years - and so has longevity, suggesting on the basis of the previous supposed link that the more meat you eat the longer you will live.
And the point that nobody seems to realise - that we all have to die sooner or later and if you eliminate all the old causes of death, infectious diseases, malnutrition and scientific research makes more diseases, like diabetes, manageable, really all that is left is having your heart stop beating, and the cause of that is likely to be some form of heart disease, however mild. Both my parents died of heart disease, one was 85 the other 92.