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A meta-analysis combines all the available data from several studies, rather than relying on a single study, so it gives us a better sense of the overall evidence

The findings The researchers found: Self-reported daily cannabis use was more common among patients with first episode psychosis, compared to controls - 29.5% (or 266 out of 901) of patients versus 6.8% (84/1,237) of controls High-potency cannabis use was also more common among patients with first episode psychosis, compared to controls - 37.1% (334/901) versus 19.4% (240/1,237) Across the 11 sites, people who used cannabis on a daily basis were three times more likely to have a diagnosis of first episode psychosis, compared with people who had never used cannabis This increased to five times more likely for daily use of high potency cannabis There was no evidence of an association between less than-weekly cannabis use and psychosis, regardless of potency The authors estimate that one in five new cases (20.4%) of psychosis across the 11 sites may be linked to daily cannabis use, and one in ten (12.2%) linked to use of high potency cannabis

Sure, stain removal works but dodging the mess altogether just takes less effort
The duty rate for hand-rolling tobacco rose by an additional 10pc, to 12pc above RPI inflation