The Implications of Regional Variations in Medicare Spending. Part 1: The Content, Quality, and Accessibility of Care

Figure 1. EOL-EI = End-of-Life Expenditure Index; HRR = hospital referral region; Q1 = quintile 1; Q2 = quintile 2; Q3 = quintile
3; Q4 = quintile 4; Q5 = quintile 5.
Overview of study design.
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Ann Intern Med
February 18, 2003
vol. 138
no. 4
273-287