Hi Mary,
I live at 7,800 feet in Colorado and work in psychiatry so this topic has always interested me. I am attaching a very interesting research paper titled " Living high, feeling low"... It speaks to depression and suicide, which of course is not applicable here, but irritability, which is often present in depression/anxiety, can occasionally also foster agitation, anger, violence...
I have attached the full text by
Brent M Kious et al. published in Harvard Review of Psychiatry (which is reputable publication) Psychiatry. Mar/Apr 2018.
Living High and Feeling Low: Altitude, Suicide, and Depression