In the UK there is a 24.2 year difference between the life expectancy for men in the Calton area of Glasgow and the national average. I think 33 years for the difference between longest and shortest expectancies in the US sounds about right.
By way of explanation:
https://en.wikipedia.org/wiki/Sectarianism_in_Glasgow
[NB I don't follow football, come from a part of Scotland that has no real sectarianism and I married to someone from an Irish Catholic background - but I've seen enough displays of horrible bigotry towards Catholics to know it can be a serious problem, although it's not nearly as bad as it was]