The incidence and prevalence of diabetes in patients with serious mental illness in North West Wales: Two cohorts, 1875–1924 & 1994–2006 compared
2008

Diabetes Rates in Patients with Serious Mental Illness in North West Wales

Sample size: 3170 publication Evidence: moderate

Author Information

Author(s): Le Noury Joanna, Khan Afshan, Harris Margaret, Wong Winnie, Williams Dawn, Roberts Tony, Tranter Richard, Healy David

Primary Institution: Department of Psychiatry, North West Wales NHS Trust

Hypothesis

Is there a link between diabetes and serious mental illness in historical and contemporary cohorts?

Conclusion

No association was found between diabetes and serious mental illness, but there may be an association between diabetes and treatment.

Supporting Evidence

  • The prevalence of Type 2 diabetes among patients with psychoses at time of first admission in both historical and contemporary samples was 0%.
  • The incidence of diabetes remained 0% in the historical sample throughout 15 years of follow-up.
  • The 15 year prevalence is likely to be over 8% in the contemporary sample.

Takeaway

Doctors looked at how many people with serious mental illness had diabetes a long time ago and now. They found that while no one had diabetes back then, more people are getting it now, possibly because of the medicine they take.

Methodology

Analysis of two epidemiologically complete databases of individuals admitted for mental illness.

Potential Biases

Potential bias due to the study being limited to service contacts and not including all patients with serious mental illness.

Limitations

The study only includes service contacts and does not survey all cases of psychosis or diabetes in the wider population.

Participant Demographics

The population was predominantly ethnically homogenous, with over 80% having traditional Welsh surnames.

Statistical Information

Confidence Interval

95% C.I 2.7, 177.8

Digital Object Identifier (DOI)

10.1186/1471-244X-8-67

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