Table 2.
Distribution of Sample of HMOs by Census Division and MSA Population
| MSA Population | ||||
|---|---|---|---|---|
| Census Division | Less Than 1 Million | Greater Than 1 Million | All | Total Number of HMOs1 |
| New England | 2 | 0 | 2 | 39 |
| Mid-Atlantic | 3 | 3 | 6 | 77 |
| South Atlantic | 2 | 3 | 5 | 114 |
| East South Central | 2 | 1 | 3 | 42 |
| West South Central | 2 | 3 | 5 | 64 |
| East North Central | 12 | 3 | 15 | 126 |
| West South Central | 0 | 0 | 0 | 51 |
| Mountain | 2 | 1 | 3 | 56 |
| Pacific | 7 | 4 | 11 | 67 |
| Total | 32 | 18 | 50 | 636 |
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.