Very good... but you are comparing apples to oranges here. Medical care was non-existent... a broken arm was a death sentence... harsh living conditions. Those factors probably had a MUCH greater impact on life expectancy rather than cholesterol...
A large part of the life expectancy calculation was death due to childhood infectious diseases. Antibiotics really made a difference in survival rates. Lots of children didn’t make it past the age of 5. That’ll drag down the life expectancy averages.