Data on 22 312 admissions to the San Diego County Trauma System were u
sed to identify 185 trauma patients admitted repeatedly to trauma unit
s. These patients were compared with the entire group of nonrepeating
trauma patients admitted during the 80-month period of the study. In c
omparison with nonrepeaters, the repeaters were younger, were more oft
en men, were more often Black, and were much more frequently victims o
f assault. Forty-eight percent of the repeaters were injured by the sa
me general mechanism on both admissions.