Smoking and Type-2 Diabetes Mellitus Toshimi Sairenchi, M.Sc. Ibaraki Health Plaza, Ibaraki Health Service Association, Ibaraki-ken, JAPAN
Contents Epidemiology of type-2 diabetes mellitus in Japan Smoking and type-2 diabetes mellitus in middle-aged population Smoking and type-2 diabetes mellitus in elderly population Possible mechanism Conclusion
Contents Epidemiology of type-2 diabetes mellitus in Japan Smoking and type-2 diabetes mellitus in middle-aged population Smoking and type-2 diabetes mellitus in elderly population Possible mechanism Conclusion
Prevalence of diabetes among Japanese men (Ministry of Health, Labour and Welfare Japan, 2004) All age Age (years) HbA 1c (%)>6.1 or medication 5.6<HbA 1c (%)<6.1 without medication Left bar: in 1997 Right bar : in 2002
(Ministry of Health, Labour and Welfare Japan, 2004) Prevalence of diabetes among Japanese women Age (years) HbA 1c (%) > 6.1 or medication 5.6 < HbA 1c (%)<6.1 without medication Left bar: in 1997 Right bar: in 2002
Notice The proportion of diabetes of borderline type increased in the elderly for both sexes. Type-2 diabetes mellitus among elderly is an increasing public health problem.
Contents Epidemiology of type-2 diabetes mellitus in Japan Smoking and type-2 diabetes mellitus in middle-aged population Smoking and type-2 diabetes mellitus in elderly population Possible mechanism Conclusion
Follow-up studies for smoking and type-2 diabetes mellitus among middle-aged persons Author DateNo. of subjects followed Uchimoto S., et al.19996,250 men Manson JE., et al ,068 men Will JC., et al ,827 men and women
Sex-specific risk ratios for type-2 diabetes mellitus according smoking habits among 275,190 men and 434,637 women (Will JC. et al., 2001)
Next Question Smoking is a risk of diabetes mellitus among middle-aged men and women. Is there a relationship between smoking and risk of diabetes mellitus among elderly?
Contents Epidemiology of type-2 diabetes mellitus in Japan Smoking and type-2 diabetes mellitus in middle-aged population Smoking and type-2 diabetes mellitus in elderly population Possible mechanism Conclusion
Age-specific risk ratios for type-2 diabetes mellitus according to smoking habits among 39,528 men, Japan, Age (years) Never-smoker Current smoker (Sairenchi T. et al., 2004)
Age-specific risk ratios for type-2 diabetes mellitus according to smoking habits among 88,613 women, Japan, Age (years) Never-smoker Current smoker (Sairenchi T. et al., 2004)
Contents Epidemiology of type-2 diabetes mellitus in Japan Smoking and type-2 diabetes mellitus in middle-aged population Smoking and type-2 diabetes mellitus in elderly population Possible mechanism Conclusion
One of the possible mechanisms Insulin action Smoking Oxdative stress Diabetes mellitus Bridges AB. et al., 1993 Paolisso G, et el., 1993
Contents Epidemiology of type-2 diabetes mellitus in Japan Smoking and type-2 diabetes mellitus in middle-aged population Smoking and type-2 diabetes mellitus in elderly population Possible mechanism Conclusion
Smoking and type-2 diabetes Smoking is a risk factor of type-2 diabetes mellitus not only among middle-aged but also among elderly men and women.