Introduction: the presence of residual post-traumatic symptoms is the norm rath¬er than the exception among Veterans with past or present post-traumatic stress disorer (PTSD), even during or after an efficacious treatment. Moreover, decrease in PTSD symptoms does not warrant a direct and equivalent increase in quality of life. There is considerable variability indices of quality of life among individuals with PTSD, sug¬gesting important individual differences. The objective of this study is to examine the relationship between post-traumatic symptom severity and quality of life among Vet¬erans consulting an operational stress injury (OSI) clinic.