Objective: To verify the association of various risk factors with Post Traumatic Stress Disorder in adults among Internally Displaced Persons of Bajour and Swat. Design: Case Control studyPlace and Duration of study: Conducted on adult males and females among internally displaced persons, selected from the IDPs Camp in Peshawer and the IDPs visiting Psychiatric setting at Hayatabad Medical Complex, Peshawer from 1 st of May to 15 th of June, 2009. Materials and methods: Cases selected among the respondents through a screening questionnaire, suffering from PTSD. The controls were those respondents which screened out negative from the questionnaire for PTSD but were from the same camp. A total of 208 cases & equal number of controls were enrolled in the study. The statistical analysis was done in a stepwise manner (Uni-variate analysis, bi variate analysis, Logistic regression) using SPSS version 17. Results: The results show that the factors significantly associated with PTSD were Exposure to Injury (OR=19.