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. Author manuscript; available in PMC: 2011 Jan 9.
Published in final edited form as: Health Aff (Millwood). 2010 Aug;29(8):1532–1538. doi: 10.1377/hlthaff.2009.1091

Exhibit 3.

Sample size and reliability of individual physician and physician group profiles

Number Mean number of episodes assigned Median Reliability (25th and 75th percentile)
Individual MD 12,615 255 0.53 (0.21, 0.79)
All Groups 185 13,790 0.91 (0.78, 0.96)
 Groups with 2-3 MD 37 1,102 0.76 (0.54, 0.87)
 Groups with 4-9 MD 34 3,091 0.85 (0.71, 0.92)
 Groups with 10-49 MD 67 8,658 0.93 (0.82, 0.96)
 Groups with 50+ MD 47 38,835 0.97 (0.93, 0.98)