RESULTS: Based on a review of previous research and observations from a refugee trauma clinic, a preliminary 24 item instrument was developed, covering seven hypothesized domains of post migration stress: perceived discrimination, lack of host country specific competences, material and economic strain, loss of home country, family and home country concerns, social strain, and family conflicts.In the context of a population based survey of mental health among refugees from Syria recently resettled in Sweden n 1215 , the factorial structure of the RPMS was investigated. ...Our findings that post migration stress primarily relating to social and economic factors seems to be associated with mental ill health among refugees is in line with previous research....