Smokers are less likely to develop Parkinson's disease, with long term smokers at the lowest risk, according to a report.
Researchers pooled data from 11 previous studies between 1960 and 2004, covering 11,809 people, 2,816 of whom had Parkinson's and 8,993 who did not.
Smoking reduces the risk of developing Parkinson's by 13%, findings show.
Other tobacco products also appear to be protective, with men who smoked pipes or cigars having a 54% lower risk.
Archives of Neurology (2007) 64:990-997