An Acute Care for Elders Quality Improvement Program for Complex, High-Cost Patients Yields Savings for the System.

Background: Acute Care for Elders (ACE) programs improve outcomes for older adults; however, little is known about whether impact varies with comorbidity severity.

Objective: To describe differences in hospital-level outcomes between ACE and routine care across various levels of comorbidity burden.

Design: Cross-sectional quality improvement study.