Pathoplastic effects of metabolic disorders in severe mental illness

Abstract

Introduction

Patients with severe mental illness (SMI) have a higher risk of weight gain, dyslipidemia and insulin-resistance. It was observed that insulin resistance has a pathoplastic effect: in Schizophrenia it was associated with a greater severity of negative symptoms, whereas in Bipolar Disorder it was associated with more chronicity and rapid cycling. Moreover a correlation was observed between obesity and a worse outcome in Bipolar Disorder type I.

Objectives

We aimed at assessing the influence of dysmetabolisms on clinical characteristics in patients with SMI.

Methods

We recruited 78 patients with SMI consecutively hospitalized in the Psychiatry Clinic of the Ospedali Riuniti of Ancona, Italy. We administered a checklist for socio-demographic and clinical features (diagnosis, age of onset, illness duration, number of episodes, number of episodes per year, suicidal attempts and comorbidities), and evaluated the following metabolic parameters: weight, height, BMI, abdominal circumference, blood pressure, total cholesterol, HDL, triglycerides, glycemia and insulinemia. We determined insulin-resistance according to the HOMA-IR model. We performed bivariate Pearson correlations to compare metabolic and socio-demographic/clinical parameters.

Results

The analyses showed positive correlations between BMI and disease duration (P = 0.003), and BMI and the number of episodes (P = 0.022). Furthermore, a positive correlation was found between HOMA-IR and the number of episodes per year (P = 0.008). The associations remained statistically significant after controlling for age through partial correlations.

Conclusions

Weight gain and insulin-resistance in severe mental illness are associated with a more severe SMI, as suggested by the greater number of acute episodes.

Disclosure

No significant relationships.