Preventable hospitalizations and Medicare managed care: a small area analysis

Area of Science:

• Health Services Research
• Public Health Policy
• Geriatric Medicine

Background:

• Managed care enrollment among Medicare beneficiaries has increased significantly.
• Changes in healthcare policy and legislative initiatives have influenced hospitalization patterns and managed care enrollment.
• Understanding the impact of managed care on preventable hospitalizations is crucial for optimizing healthcare delivery for seniors.

Purpose of the Study:

• To investigate the relationship between preventable hospitalization rates and managed care enrollment at the primary care service area level.
• To analyze trends in this association between 1995 and 2005, a period of significant policy shifts.

Main Methods:

• Utilized Healthcare Cost and Utilization Project State Inpatient Data from Arizona, Massachusetts, and New York for 1995 and 2005.
• Employed multivariate ordinary least squares regressions, adjusting for heteroscedasticity.
• Conducted cross-sectional and pooled sample analyses to assess yearly associations and changes over time.

Main Results:

• Preventable hospitalization rates were inversely associated with Medicare managed care enrollment in both 1995 and 2005.
• The strength of this inverse association weakened significantly by 2005 compared to 1995.
• The decline in the contribution of managed care to reducing preventable hospitalizations was statistically significant.

Conclusions:

• The effectiveness of Medicare managed care in reducing preventable hospitalizations diminished between 1995 and 2005, despite increased enrollment.
• This decline may be attributed to a shift towards private fee-for-service managed care plans, potentially reducing emphasis on care coordination.
• Healthcare policy and plan design evolution necessitate ongoing evaluation of managed care's role in preventing hospitalizations.