[Prevalence of Hypothyroidism in Major Psychiatric Disorders in Hospitalised Patients in Montserrat Hospital During the period March to October 2010]. / Prevalencia de hipotiroidismo en trastorno psiquiátrico mayor de pacientes hospitalizados en la Clínica Montserrat en el periodo de marzo a octubre de 2010.

INTRODUCTION: Hypothyroidism results from inadequate production of thyroid hormone. It is known that there is a relationship between the major psychiatric disorders and hypothyroidism. OBJECTIVE: To determine the prevalence of hypothyroidism in patients admitted due to major psychiatric disorders in Montserrat Hospital during the period from March to October 2010. MATERIAL AND METHODS: A descriptive cross-sectional study was conducted on 105 patients admitted to Montserrat Hospital with a primary diagnosis of major psychiatric disorder (major depression, bipolar affective disorder, generalised panic disorder, panic disorder, mixed anxiety-depressive disorder, and schizophrenia) in the aforementioned period. Thyroid Stimulating Hormone (TSH) was performed to assess the evidence of hypothyroidism. RESULTS: The overall prevalence of hypothyroidism was found to be 10.5% (95% CI; 5%-16%). It was 12.5% in anxiety disorder, 11.1% in depressive disorder, with a lower prevalence of 10.3% for bipolar disorder, and 9.9% for schizophrenia. CONCLUSIONS: The overall prevalence of hypothyroidism was found to be less than in the general population, which is between 4.64% and 18.5%, and hypothyroidism was found in disorders other than depression.