Arizona, Feb. 28 -- According to the World Health Organisation, around 3.9 per cent of the global population has had post-traumatic stress disorder (PTSD) at some point in their lives. That figure is greater in the United States, at over 6 per cent.

Individuals can develop PTSD after experiencing or witnessing a traumatic event, which can endure for months or years. However, much remains unknown about this mental health problem. Anthropologists, social scientists, and veterans from Arizona State University and the Naval Postgraduate School are the first to study the link between cortisol and testosterone levels and PTSD in a non-industrialized community

This new study sheds more light on the PTSD puzzle.

Previous studies about PTSD and...