Sex- and age-specific impacts of smoking, overweight/obesity, hypertension, and diabetes mellitus in the development of disabling dementia in a Japanese population

BACKGROUND@#Sex- and age-specific impacts of cardiovascular risk factors on the development of dementia have not been well evaluated. We investigated these impacts of smoking, overweight/obesity, hypertension, and diabetes mellitus on the risk of disabling dementia.@*METHODS@#The study participants were 25,029 (10,134 men and 14,895 women) Japanese aged 40-74 years without disabling dementia at baseline (2008-2013). They were assessed on smoking status (non-current or current), overweight/obesity (body mass index ≥25 kg/m2 and ≥30 kg/m2, respectively), hypertension (systolic blood pressure ≥140 mmHg, diastolic blood pressure ≥90 mmHg or any antihypertensive medication use), and diabetes mellitus (a fasting serum glucose ≥126 mg/dL, non-fasting glucose ≥200 mg/dL, hemoglobin A1c ≥6.5% by the National Glycohemoglobin Standardization Program or glucose-lowering medication use) at baseline. Disabling dementia was identified as the level of care required ≥1 and cognitive disability grade ≥IIa according to the National Long-term Care Insurance Database. We used a Cox proportional regression model to estimate hazard ratios and 95% confidence intervals (95% CIs) of disabling dementia according to the cardiovascular risk factors and calculated the population attributable fractions (PAFs).@*RESULTS@#During a median follow-up of 9.1 years, 1,322 (606 men and 716 women) developed disabling dementia. Current smoking and hypertension were associated with a higher risk of disabling dementia in both sexes, whereas overweight or obesity was not associated with the risk in either sex. Diabetes mellitus was associated with a higher risk only in women (p for sex interaction = 0.04). The significant PAFs were 13% for smoking and 14% for hypertension in men and 3% for smoking, 12% for hypertension, and 5% for diabetes mellitus in women. The total PAFs of the significant risk factors were 28% in men and 20% in women. When stratified by age, hypertension in midlife (40-64 years) was associated with the increased risk in men, while diabetes mellitus in later-life (65-74 years) was so in women.@*CONCLUSIONS@#A substantial burden of disabling dementia was attributable to smoking, and hypertension in both sexes and diabetes mellitus in women, which may require the management of these cardiovascular risk factors to prevent dementia.

Disease burden of diabetes attributable to high body mass index in China,1990-2016 / 中华流行病学杂志

Objective To analyze the burden of disease (BOD) on diabetes attributable to high BMI in China from 1990 to 2016.Methods Data based on population of the 2016 Global Burden of Disease Study for China were used to analyze the attributable fractions (PAF) of BOD for diabetes attributable to high BMI.Measurements for attributable BOD of diabetes included disability adjusted life years (DALY),years of lost life (YLL),years living with disability (YLD),death number and mortality rate.The average world population from 2010 to 2035 was used as a reference.Results In 2016,death number of diabetes attributable to high BMI was 40 310,which was significantly higher than that in 1990 (15 008).Age-standardized death rate of diabetes attributable to high BMI increased from 2.01/100 000 in 1990 to 2.60/100 000 in 2016,which showed a more significant increasing trend in both males and people aged 15-49 years.DALYs of diabetes attributable to high BMI increased from 1.09 million person years to 3.30 million person years.YLL and YLD also showed increasing trends.The highest increasing rate of YLD was in people aged 15-49 years.High BMI was responsible for 26.01％ of the diabetes deaths in 2016 in China,an increase of 39.39％ compared with that in 1990 (18.66％).Most provinces in China experienced a sharp increase of DALY of diabetes attributable to high BMI from 1990 to 2016.Inner Mongolia,Xinjiang,Zhejiang,Macao SAR,Sichuan and Qinghai had the most significant increase tendency in terms of DALY rate during this period.Conclusions There was a rapid increase of the deaths and mortality rate of diabetes attributable to high BMI,causing a heavy disease burden,in China from 1990 to 2016.The BOD varied in both different age and gender groups.More attention should be paid to males and people aged 15-49 years in the prevention and control programs of diabetes.

Disease burden of diabetes attributable to high body mass index in China,1990-2016 / 中华流行病学杂志

Objective To analyze the burden of disease (BOD) on diabetes attributable to high BMI in China from 1990 to 2016.Methods Data based on population of the 2016 Global Burden of Disease Study for China were used to analyze the attributable fractions (PAF) of BOD for diabetes attributable to high BMI.Measurements for attributable BOD of diabetes included disability adjusted life years (DALY),years of lost life (YLL),years living with disability (YLD),death number and mortality rate.The average world population from 2010 to 2035 was used as a reference.Results In 2016,death number of diabetes attributable to high BMI was 40 310,which was significantly higher than that in 1990 (15 008).Age-standardized death rate of diabetes attributable to high BMI increased from 2.01/100 000 in 1990 to 2.60/100 000 in 2016,which showed a more significant increasing trend in both males and people aged 15-49 years.DALYs of diabetes attributable to high BMI increased from 1.09 million person years to 3.30 million person years.YLL and YLD also showed increasing trends.The highest increasing rate of YLD was in people aged 15-49 years.High BMI was responsible for 26.01％ of the diabetes deaths in 2016 in China,an increase of 39.39％ compared with that in 1990 (18.66％).Most provinces in China experienced a sharp increase of DALY of diabetes attributable to high BMI from 1990 to 2016.Inner Mongolia,Xinjiang,Zhejiang,Macao SAR,Sichuan and Qinghai had the most significant increase tendency in terms of DALY rate during this period.Conclusions There was a rapid increase of the deaths and mortality rate of diabetes attributable to high BMI,causing a heavy disease burden,in China from 1990 to 2016.The BOD varied in both different age and gender groups.More attention should be paid to males and people aged 15-49 years in the prevention and control programs of diabetes.