Physician practice size and variations in treatments and outcomes: evidence from Medicare patients with AMI

Area of Science:

• Cardiology
• Health Services Research
• Healthcare Policy

Background:

• Physician practice size is not well understood in relation to patient treatment and outcomes.
• Variations in care delivery within hospitals may exist based on physician practice characteristics.

Purpose of the Study:

• To investigate the association between attending physician practice size and the quality of care for Medicare patients diagnosed with acute myocardial infarction (AMI).

Main Methods:

• Retrospective analysis of Medicare patient data.
• Comparison of treatment patterns and outcomes for patients treated by solo physicians versus those in larger practices.
• Statistical adjustment for patient and physician characteristics.

Main Results:

• Patients treated by solo physicians were less likely to undergo timely cardiac catheterization and angioplasty (within 24 hours of admission).
• Higher in-hospital mortality rates were observed for patients treated by solo physicians.
• These disparities persisted after accounting for patient and physician factors.

Conclusions:

• Solo physician practice size is associated with suboptimal care delivery for acute myocardial infarction (AMI) patients.
• Solo practitioners may be less likely to adhere to established clinical guidelines for AMI management.
• Findings suggest potential quality of care gaps linked to physician practice structure.