Rates of type 2 diabetes higher in people with common psychiatric disorders

A new study has found that the prevalence of type 2 diabetes (T2D) is elevated in people with a psychiatric disorder compared with the general population. The research has been published in the ‘Diabetologia Journal’. Psychiatric disorders are common, impair the quality of life and are associated with increased mortality rates. This excess mortality is caused in part by more frequent suicides and accidents, but also by an elevated risk of developing physical conditions known to be linked to mental health problems such as cardiovascular and respiratory diseases. Diabetes is an increasingly common disease throughout the world and estimates suggest that 6 per cent to 9 per cent of the global general population are currently affected. Rates have been rising from 1990 onwards in a trend that is expected to continue for the next 20 years.

Previous research has found that the prevalence of T2D is higher in people with bipolar disorder, schizophrenia, and major depression compared to the general population. Despite this, no systematic overview of this research is currently available to examine the possible links between the prevalence of T2D and psychiatric disorders in general.

The authors conducted an in-depth search of four electronic databases of scientific papers and found 32 systematic reviews based on 245 unique primary studies. There were 11 categories of disorders: schizophrenia, bipolar disorder, depression, substance use disorder, anxiety disorder, eating disorder, intellectual disability, psychosis, sleep disorder, dementia, and a ‘mixed’ group that comprised different types of psychiatric disorders.

The study found that people with a sleep disorder had the highest rates of T2D with 40 per cent of subjects having the disease while its prevalence among individuals with other psychiatric disorders was 21 per cent (binge eating disorder), 16 per cent (substance use disorder), 14 per cent (anxiety disorders), 11 per cent (bipolar disorder), and 11 per cent (psychosis). Prevalence of T2D was lowest among people with an intellectual disability with 8 per cent of individuals having the disease. In each case, these rates are as high or higher than the 6-9 per cent level of T2D found in the general population.

The researchers explained that sleep disorders constitute a subgroup of psychiatric disorders and have high comorbidity with several other diseases. In the review, most of the primary studies were conducted among people with additional diseases such as chronic kidney disease.

Source: ANI

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