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Incidence of schizophrenia lower in people with type I diabetes

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  • Notes: This study did not assess the sequence of events—that is, whether a person developed schizophrenia before or after developing diabetes. Although expert assessment of case notes may give a more accurate diagnosis of schizophrenia than relying on recorded diagnoses, its accuracy will vary depending on accuracy and thoroughness of the case notes. It is possible that the subsample that was checked for false positive diagnoses may not have been representative of register diagnoses as a whole.

  • Source of funding: Millennium Pharmaceuticals and Wyeth-Ayerst.


  • Competing interests: RvW has been a consultant for Eli Lilly Lilly and has received honoraria from Eli Lilly and Janssen-Cilag. MDH has been a consultant for, received grant/research support and honoraria from, and been on the speakers/advisory boards of AstraZeneca, Lundbeck JA, Janssen-Cilag, Eli Lilly, Pfizer, Sanofi and Bristol- Myers Squibb.

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