Final answer:
The American College of Surgeons (ACS) requires trauma centers to maintain a trauma registry as part of their accreditation process.
Step-by-step explanation:
The association that requires trauma centers to maintain a trauma registry is the American College of Surgeons (ACS).
A trauma registry is an electronic database that collects and analyzes detailed information about patients admitted to trauma centers. This information is critical for monitoring and improving the quality of trauma care.
The ACS has a Trauma Quality Improvement Program (TQIP) that sets standards for trauma centers and requires them to maintain a trauma registry as part of their accreditation process.