The COVID-19 pandemic affected individuals, governments, and health care centers all around the globe. Social isolation obligation, restricted working shifts, and curfews posed unprecedented challenges for the population. Social isolation, boredom, and financial problems have been shown to stress peoples' mental health in previous comparable pandemics and even in regular situations. Individuals with a mental illness may particularly be at risk due to an already instable mental health status. While research mainly focused on the pandemic's impact on somatic health care and risk group patients, psychological obstacles caused by legal restrictions and their impact on already mentally affected individuals have been discussed, but so far only scarcely been investigated in a large sample. For this study, 12,028 people completed an online-survey during that time in Germany, when the COVID-19 outbreak gained momentum with a surge in cases and death rates as well as a lockdown of the public life. Generalized anxiety (GAD-7), depression (PHQ-2), distress (distress thermometer) and COVID-19-specific items, especially COVID-19-related fear, were assessed in healthy individuals, patients suffering from mental illnesses, and in patients with chronic somatic diseases, known to be at risk for an unfavorable course of COVID-19. Results show that the COVID-19-pandemic significantly worsens psychometric scores throughout the population - individuals with already heightened levels, like people with mental illnesses now reach concerning levels. Surprisingly, even though generalized anxiety, depressive symptoms, and perceived distress are elevated in individuals with mental illness, these individuals seem to be less affected by explicit COVID-19-related fear, than the general population or individuals with chronic somatic diseases. This study thus objectively quantifies the psychological impact of COVID-19 in a large sample and provides evidence for not only the public, but also critically affected individuals with a mental illness.
Keywords: COVID-19; depression; distress; generalized anxiety; mental health.