Position of the abdominal seat belt sign and its predictive utility for abdominal trauma.

The seat belt sign is associated with abdominal and lumbar injury; however, the location is important. This association is strong when the seat belt sign is above ASIS, but when the sign is at/below the ASIS the injury rate is similar to participants with no seat belt sign. Routine imaging of the abdomen may be appropriate only for those with a seat belt sign above ASIS.