BACKGROUND: This study evaluated psoas muscle area (PMA) as a predictor of frailty and functional outcome in trauma patients. METHODS: The cohort included 211 trauma patients admitted to an urban level I trauma center from March 2012 to May 2014 who consented to participate in a longitudinal study and underwent abdominal-pelvic computed tomography scans during their initial evaluation. Physical component scores (PCS) of the Veterans RAND 12-Item Health Survey were administered to assess physical functionality at baseline and at 3, 6, and 12 months after injury. PMA in mm(2) and Hounsfield units was calculated using the Centricity PACS system. Statistical models were stratified by injury severity score (ISS)
