The researchers recruited 697 smokers who wanted to quit and divided them into two groups. The first group quit smoking quickly, that is, stop smoking on the day of quitting smoking; the second group quit smoking gradually, set a date to stop smoking, and gradually reduce the number of smoking within a month. A month later, the success rate of quitting smoking was 49% in the quick quitting smoking group, compared with 39% in the gradual quitting smoking group. As a result, the researchers believe that the success rate of quitting smoking quickly is higher than that of quitting smoking gradually.
The statement 'The risk of stroke in the quick quitting group will be reduced to that of non-smokers after 5 to 15 years' can best support the above conclusion.