Table 1. Association between independent variables and the adjusted number of dialysis stations.
| Predictors | Zero-order correlations | Standardized regression coefficients | |
|---|---|---|---|
|
| |||
| Model without region | Model with region | ||
| Population density | .06 | **−.24 | **−.23 |
| Income | **.20 | −.10 | −.08 |
| Physician-specialist | **.45 | **.66 | **.65 |
| Population growth | −.02 | *.13 | .08 |
| Medicare reimbursement per enrollee | **.18 | .03 | .04 |
| Midwest | — | — | .03 |
| South | — | — | .09 |
| West | — | — | .07 |
| R2 | — | .27 | .27 |
| N = 408 | |||
*
Statistically significant at the p < .05 level.
**
Statistically significant at the p < .01 level.
NOTES: R2 is percent of variance explained. N is the number of cases.
SOURCE: Cleary, P.D., Harvard Medical School; Schlesinger, M., John F. Kennedy School of Government; Blumenthal, D., Massachusetts General Hospital.