What was the cause of role loss many adult Hmong faced when they came to the U.S.?

What was the cause of role loss many adult Hmong faced when they came to the U.S.? How does this loss affect their adjustment to America and how do the families adapt? Do you think this scenario is true of most immigrant and/or refugee populations? What are the American health system challenges to being culturally-informed and culturally-responsive to the needs of immigrant and/or refugee populations, particularly related to treating common conditions like post traumatic stress disorder (PTSD)?