RT Journal
A1 Friedrich MJ
T1 TObacco smoke and dementia
JF JAMA
JO JAMA
YR 2013
FD February 20
VO 309
IS 7
SP 649
OP 649
DO 10.1001/jama.2013.503
UL http://dx.doi.org/10.1001/jama.2013.503
AB 
Researchers interviewed 5921 people aged 60 years or older who had lived for at least 5 years in communities in several Chinese provinces. They characterized the participants' smoking habits and exposure to ETS and assessed their levels of dementia syndromes. About 10% of those interviewed (626 participants) had severe dementia syndromes, and those exposed to ETS had a significantly higher risk. The effect of ETS was dose-dependent and involved people who had never smoked as well as former and current smokers, suggesting that ETS should be considered an important risk factor for severe dementia syndromes.