Regional differences in hospital utilization. How much can be traced to population differences?

Area of Science:

• Health Services Research
• Socioeconomics
• Healthcare Policy

Background:

• Substantial regional variations exist in hospital utilization across the United States.
• Previous research suggests socioeconomic factors may influence healthcare access and service use.

Purpose of the Study:

• To investigate the extent to which socioeconomic composition explains regional differences in hospital utilization.
• To compare hospital utilization patterns between New York City, Los Angeles, and broader Northeastern and Western Standard Metropolitan Statistical Areas (SMSAs).

Main Methods:

• Comparative analysis of hospital utilization data (days of care, admission rates, length of stay).
• Assessment of socioeconomic characteristics across defined regional populations.
• Statistical adjustment for demographic and socioeconomic variables.

Main Results:

• Adjusting for socioeconomic factors reduced the New York-Los Angeles difference in hospital days from 43% to 22%.
• The Northeastern-Western difference in hospital days shifted from 18% to -6% after adjustments.
• Socioeconomic adjustments had a greater impact on admission rates than on length of stay.

Conclusions:

• Socioeconomic factors are significant determinants of regional hospital utilization disparities.
• New York City's high average hospital stay is partly attributed to a high prevalence of extended hospital episodes (≥51 days).
• Challenges in arranging posthospital care for extended-stay patients may contribute to longer hospitalizations in certain regions.