Research has indicated that vegetarians live on average 9.5 years longer than meateaters (if male) and 6.1 years longer (if female), giving an overall average of about 8 years longer. That is similar to the gap between non-smokers and smokers.
Clearly other factors apart from diet are also involved. For example, the referenced research found that vegetarians are on average 14kg (30lb, or 2 stones and 2 pounds) lighter than meateaters. And diets vary among vegetarians, as they also vary among meateaters. Nonetheless, that is still very interesting research.
My question is this:
has there been any similar research on veganism?
For example, has there been a study comparing vegans with non-vegan vegetarians for life expectancy, or for that matter vegans with meateaters?