The cannabis users surveyed were 34 percent more likely to report sleeping fewer than 6 hours per night when compared to non-users, as well as being 56 percent more likely to report sleeping more than 9 hours when compared to non-users, after accounting for potential confounding factors.
Recent cannabis users were also more likely to report having difficulty falling asleep, staying asleep, sleeping too much in the past two weeks, and having ever told a physician about sleeping problems. However, cannabis exposure was not associated with frequent daytime sleepiness.
"We determined there to be a possible exposure-response relationship between frequency of use and sleep duration; heavy users were at the greatest risk of both extremes of nightly sleep duration compared with non-users," the team writes.
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