Article content Researchers in Denmark found that over the past 25 years, schizophrenia diagnoses linked to marijuana use in the country had increased. We apologize, but this video has failed to load. Try refreshing your browser, or Increased schizophrenia cases linked to cannabis use disorder: Study Back to video In 1995, 2% of schizophrenia diagnoses were associated with cannabis use disorder. In 2000, it increased to around 4%. And since 2010, that number increased to 8%, according to the study. “I think it is highly important to use both our study and other studies to highlight and emphasize that cannabis use is not harmless,” said researcher Carsten Hjorthoj, one of the authors of the study published in the medical journal,