Whilst trauma has been well-studied in relation to post-traumatic stress disorder, there has never been a review to systematically test whether it is a risk factor for a range of mental disorders like depression and anxiety. Benedikt Amann and his team conducted the first such review, including 14 meta-analyses and a total of 106 studies, involving 16,277 psychiatric cases and 77,586 control subjects. He says “…our work underlines that psychological trauma is one of the most robust and preventable risk factors for suffering a mental disorder later on.”