So it is a generalization to state that education is a major factor. There is so much to consider. Besides people who do tests often have different results on another study. Different parts of the world have different results for the same studies.
I.e. eggs, bad... eggs ok....eggs bad....eggs are one of the most digestable proteins....eggs have a lot of cholesterol.... wait the cholestrol isnt abosrbed by the body as much as we thought.. LOL please.. People get grant money to conduct these studies.
Bottom line is that human beings are complex creatures and every person is different. My one grandfather smoked from the age of 15 until he died of lung cancer at age 87. My other grandfather smoked for about 15-20 yrs but stopped and died of lung cancer at age 62. So who the hell knows!