well that is because of poverty
the poorer a region. the less life you will have. Simple as.
and remember folks. Middle age ain't 50. In america its 37.5 years of age, since the average life expectancy is 74 years old.
and also another sobering thought. ......when you see 74 years old for example as a life expectancy. ONLY HALF make it to that age, the other half do not!.......so your chances of making it to 74 is only 50%....and every year after that your percentage goes way down, as you get to 75, 76, ect.
so eat well, and don't fuck up your body.