Publications by authors named "Thomas Martin Schaefer"

Background: Differences in the distribution of individual-level clinical risk factors across regions do not fully explain the observed global disparities in COVID-19 outcomes. We aimed to investigate the associations between environmental and societal factors and country-level variations in mortality attributed to COVID-19 among people with rheumatic disease globally.

Methods: In this observational study, we derived individual-level data on adults (aged 18-99 years) with rheumatic disease and a confirmed status of their highest COVID-19 severity level from the COVID-19 Global Rheumatology Alliance (GRA) registry, collected between March 12, 2020, and Aug 27, 2021.

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The dissociative subtype of posttraumatic stress disorder (PTSD) was officially introduced in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). In accordance with this new classification, prior studies using Latent Class Analysis (LCA) empirically identified a subgroup of patients that were characterized by a high severity of dissociative symptoms. Despite the high prevalence of PTSD in patients with substance use disorders (SUD), however, no LCA studies on the dissociative subtype of PTSD exist in this population so far.

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Background: Antiviral therapy with interferon-alpha (IFN-α) for hepatitis C virus (HCV) infection is associated with increased risk for depression.

Aims: To identify clinical predictors for IFN-α-induced depression during antiviral therapy for HCV infection.

Method: Depression (defined with the Montgomery-Åsberg Depression Rating Scale (MADRS)) was evaluated before and during antiviral treatment in 91 people with chronic HCV infection without a history of psychiatric disorders.

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