Olff, M.

injury patient health stress posttraumatic stress disorder injury patients posttraumatic study symptom eq -5d posttraumatic stress symptoms utility disorder hrqol score month problem 0.001 severity follow-up questionnaire accident domain psychiatry quality sample trauma outcome ptsd symptoms status 0.001 problems health utilities index population level haagsma ies ≥ 35 victim response classification non-hospitalized ies-score measure ies scores hospitalization health state posttraumatic stress association non-hospitalized patients instrument health status motor vehicle accidents respondent impact analysis utility loss prevalence system event scale state result accident category hui 3 meerding wj difference manuscript department anxiety netherland hospital table comorbidity scale injury severity class ptsd prevalence rates hospitalization status erasmus university rotterdam 9 months design toet h vehicle