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. 2002 Aug;37(4):963–984. doi: 10.1034/j.1600-0560.2002.61.x

Table 1.

Distribution of HMO Characteristics

Sample National1
Group 45.4 14.9
IPA 28.4 43.4
Network/Mixed 26.2 41.7
For Profit 55.9 62.7
Size (75,000 or more) 44.5 74.0
1

Source: InterStudy Competitive Edge 7.1 (Minneapolis, MN, 1997). The data reported in this column is for July 1, 1996.

2

There is one major difference between the InterStudy data and our survey data. InterStudy data sometimes treats an HMO operating in two neighboring MSAs or MSAs in the state as one HMO. We always treat each HMO–MSA pair as a separate observation.