An analysis in the British Journal of Psychiatry examined 1,160 Chileans in 2003 and 2011, both before and after the sixth-most-powerful earthquake on record and subsequent tsunami struck their country in 2010. When the first survey was done in 2003, none of the participants admitted to a history of post-traumatic stress disorder (PTSD) or major depressive disorder (MDD). After the 2010 earthquake, 9.1 percent of the survivors were diagnosed with PTSD and 14.4% with MDD.
The authors correlated the risk of developing these disorders with multiple pre-disaster stressors, such as serious illness or injury, death of a loved one, divorce, unemployment or financial struggles, legal troubles or loss of a valuable possession. Basically, almost anything that 99 percent of the world faces. It was if individuals crossed a "severity threshold" of four or more pre-disaster stressors that they seemed to be at increased risk for post-disaster PTSD (relative to those rare people who declared zero stressors) while MDD displayed a slightly different pattern: Even a single stressor increased a person's risk of developing post-disaster MDD, and each additional stressor further increased the risk.
Image provided by Brown University.
Since we are just coming out of a coronavirus pandemic, and black and latino people in the U.S. have greater co-morbidities that led to higher COVID-19 deaths, those plus the increased job instability that 40,000,000 Americans face due to government lockdowns could mean they are most likely to suffer from serious mental health conditions following the pandemic.