[04.08.2006]
The impact of psychoactive cannabis use on cognitive function in people under 65 years of age
Brief information about the study
Target:
The study was designed to identify and describe the potential adverse effects of cannabis use on cognitive function over a 12-year period in individuals under the age of 65. It was a follow-up study of a randomized, randomized, and randomized sample of adults in East Baltimore.
Place:
USA, Maryland
Participants:
The study included 1,318 participants from Baltimore, Maryland, who completed the Mini-Mental State Examination (MMSE) during three study waves in 1981, 1982, and 1993-1996. Individual MMSE scores were calculated at each subsequent wave (Waves 2 and 3) for each study participant.
Key results:
After 12 years, study participants showed an average 1.20-point (SD 1.90) decrease in MMSE scores, with 66% of those showing at least a one-point decrease in MMSE scores. A significant decrease of three points or more was shown by 15% of participants in the 18-29 age group. There were no significant differences in cognitive decline between heavy, moderate, and non-users of cannabis. There were also no differences in cognitive decline between male and female cannabis users.
Conclusion:
The study authors concluded that over a long period of time, cognitive decline occurs across all age groups in people under 65. This decline is closely related to aging and educational attainment, but is not related to cannabis use.
"American journal of epidemiology" 1999, issue 149, pp. 794-800
Detailed information about the study
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