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Bipolar Disorder (BD) is a mental disorder which frequently requires long hospitalizations and need for acute psychiatric care. The aim of this study was to describe a nationwide perspective of BD related hospitalizations and to use a BigData based approach in mental health research. We performed a retrospective observational study using a nationwide hospitalization database containing all hospitalizations registered in Portuguese public hospitals from 2008-2015. Hospitalizations with a primary diagnosis of BD were selected based on International Classification of Diseases version 9, Clinical Modification (ICD-9-CM) codes of diagnosis 296.xx (excluding 296.2x; 296.3x and 296.9x). From 20,807 hospitalizations belonging to 13,300 patients, around 33.4% occurred in male patients with a median length of stay of 16.0 days and a mean age of 47.9 years. The most common hospitalization diagnosis in BD has the code 296.4x (manic episode) representing 34.3% of all hospitalizations, followed by the code 296.5x (depressed episode) with 21.4%. The mean estimated hospitalization charge was 3,508.5€ per episode, with a total charge of 73M€ in the 8-year period of this study.This is a nationwide study giving a broad perspective of the BD hospitalization panorama at a national level. We found important differences in hospitalization characteristics by sex, age and primary diagnosis. [ABSTRACT FROM AUTHOR]

Introduction: Recent evidence suggests that incidence of Anorexia nervosa (AN) has remained stable over the last decades in Western Europe, while decreasing for Bulimia nervosa (BN). It is well‐known that most individuals with an ED (Eating disorder) do not seek medical treatment. Objective: The present study analyses hospitalizations related with EDs held in mainland Portuguese public hospitals between 2000 and 2014. Method: A retrospective observational study was performed gathering all inpatient episodes with primary or secondary diagnosis of ED. Number of patients, gender, mean age at discharge, suicide‐attempts related hospitalizations, in‐hospital mortality, length of stay, and mean charges were analyzed. Results: There were a total of 4,485 hospitalizations with an associated ED. AN was the most frequent ED (n = 2,806). Suicide attempt‐related hospitalizations were most common among patients with BN (10.1% of BN hospitalizations) or AN (5.2% of AN hospitalizations). Discussion: AN has higher in‐hospital mortality than BN. We observed a higher proportion of suicide related hospitalizations in BN when compared to AN. Although pica, rumination disorder, and psychogenic vomiting represent a smaller portion of all EDs, this study was the first to describe hospitalization trends for this set of EDs for a 15‐year period, to the best of our knowledge. [ABSTRACT FROM AUTHOR]