Suppose we wanted to estimate how many car owners there are in the UK and how many of those own a Ford Fiesta, but we only have data on those people who visited Ford car showrooms in the last year. If 10% of the showroom visitors owned a Fiesta, then, because of the bias in
A new study published in the scientific journal Addiction estimates that in Australia between 2007 and 2016, 81% to 85% of all cannabis was consumed by the 16% of all Australian cannabis users who used daily. Weekly users and daily users together accounted for an estimated 98% of all cannabis consumed in Australia between 2007
A new CAMH and Institute for Clinical Evaluative Sciences (ICES) study shows that people with schizophrenia account for more than 1 in 10 cases of suicide in Ontario, and that young people are disproportionately affected. “Among people who died by suicide, having a diagnosis of schizophrenia is clearly over-represented,” says Dr. Juveria Zaheer, first author
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