A large Canadian study indicated that middle-aged and older adults who sought hospital or emergency room care for cannabis use had nearly twice the risk of developing dementia within five years, compared to the general population. Compared to patients seeking care for other reasons, cannabis users had a 23% higher risk of dementia. The study utilized medical records from six million Ontarians between 2008 and 2021 and suggested that cannabis use might be linked to cognitive decline, but did not establish a causal relationship. Dr. Daniel T. Myran emphasized the need for further investigation.
The study found that middle-aged and older adults who sought hospital care due to cannabis use were almost twice as likely to develop dementia over five years.
Authors accounted for health and sociodemographic differences, but the findings still raise serious concerns that require further exploration regarding cannabis and dementia.
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