Ottawa, Ontario:
Lifetime cannabis users are likely to be single, well educated, and earning an above average salary, according to a recent survey of 13,900 Canadians conducted by Health Canada and the Canadian Executive Council on Addictions.
Approximately 45 percent of the Canadian population over age 15 reported having used cannabis during their lifetime - up from 23 percent in 1989, the survey reported. Lifetime cannabis use increased with education and income. Among those with some post-secondary education, 52 percent reported having used cannabis. By comparison, among those without a high school degree, only 35 percent reported having tried cannabis. In
addition, 55 percent of those respondents with a "high income adequacy" said they had used cannabis, as opposed to only 43 percent of those with a "low income adequacy."
Among those who reported consuming cannabis, most said that they used it infrequently and did not "experience[e] serious harm due to their cannabis use."
Full text of the survey is available from the Canadian Executive Council on Addictions website at:
http://www.ccsa.ca/pdf/ccsa-004028-2005.pdf
AND
Heavy Cannabis Use Not Associated With Cognitive Deficits,
Study Says
Belmont, MA:
Heavy, long-term use of cannabis appears to have a negligible impact on cognition and memory, according to clinical trial
data published in the current issue of the American Journal of Addictions.
Researchers at Harvard Medical School performed magnetic resonance imaging on the brains of 22 long-term cannabis users (reporting a mean of20,100 lifetime episodes of smoking) and 26 controls (subjects with no history of cannabis use). Imaging displayed "no significant differences" between heavy cannabis smokers compared to controls.
"These findings are consistent with recent literature suggesting that cannabis use is not associated with structural changes within the brain as a whole or the hippocampus in particular," authors concluded.
Full text of the study, "Lack of hippocampal volume change in long-term heavy cannabis users," appears in the January-February issue of the American Journal of Addictions.
I thought this was a pretty interesting article.
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