Don't know numbers: but clearly statistically people who stop smoking fare far better than those who continue, and same with drinking alcohol. There are some illnesses, such as cirrhosis, where studies have been done that show that fewer than 10% of those with severe cirrhosis (with bleeding) will survive 5 years if they continue drinking, and 40% or so will survive if they stop. However, people aren't statistics.
Answered 12/21/2014
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