Abstract
Background: There is very little research on the changes in a blood sugar at the time of and
five years after smoking abstention, and little research on whether or not the changes of a
blood sugar abroad can be applied to those in Japan. Therefore, in order to verify the longterm
changes of a blood sugar in Japanese males, the changes in blood a sugar level of the
same ex-smokers and smokers over a period of 10 years were investigated
Method: Using the results of periodic heath checkups of male workers, this research extracted
the changes over the years of the a blood sugar of individuals from the ex-smoker and smoker
groups for 10 years, and a retrospective cohort research was conducted.
Results: He average a blood sugar value of the ex-smoker group was compared with the a blood
sugar level of the baseline year and as a result, a blood sugar level continued to increase
from first year to the third year after smoking abstention and, At the 5th year after smoking
abstention, compared with its baseline, it had significantly decreased. Furthermore, compared
with the baseline, the number of subjects who showed lower blood sugar diggers at the
10th year after quitting smoking was the same that of those who showed lower blood sugars at
the 5th year. As a result of the comparison of the average blood sugar of smoker group in
each year with its baseline it gradually increased from the first year, and it was highest at
the 10th year compared with other years of the group.
Conclusion: It was revealed that the increase of blood sugar level after smoking abstention
does not extend over a long period. On the other hand, the blood sugar of the smoker group
tended to increase. It suggested that smoking increases the risk of diabetes.
