The percentage "of Americans age three to seventeen" suffering from mental health disorders who "go undiagnosed and untreated" in a given year, according to an article on the U.S. Naval Institute Blog -- Prepare for the Coming Mental Health Challenge.
7.2%
The percentage of a sample of U.S. adults who "met criteria" for either post-traumatic stress disorder (PTSD) or complex post-traumatic stress disorder (CPTSD), according to a study recently published in the Journal of Traumatic Stress -- ICD‐11 Posttraumatic Stress Disorder and Complex Posttraumatic Stress Disorder in the United States: A Population‐Based Study. "(T)he prevalence rates were 3.4% for PTSD and 3.8% for CPTSD."