Of the above factors, premorbid psychiatric illness is the strongest predictor of post-burn PTSD. In Palmu's study of 107 burn patients, %TBSA exposure additionally independently and strongly predicted risk for mental disorders, especially for anxiety disorders and delirium.

Publication reference : Palmu R et al. Mental disorders after burn injury: a prospective study. Burns 2011; 37: 601-9
Reference URL: https://pubmed.ncbi.nlm.nih.gov/21081260/