Table 4. Coefficients and adjusted odds ratios for readmission and discretionary readmission models, by variables entered in the models.
| Variable | Readmission | Discretionary readmission | ||
|---|---|---|---|---|
|
|
|
|||
| Coefficient | Adjusted odds ratio | Coefficient | Adjusted odds ratio | |
| Intercept | −.4633 | — | −.6681 | — |
| Poor health status | 2.9711 | 2.1 | 2.1130 | 3.0 |
| Chronic DRG's | .9516 | 2.6 | 21.1995 | 3.3 |
| Intermediate DRG's | 3.7944 | 2.2 | 2.9468 | 2.6 |
| Surgery | 4−.3797 | .7 | 3−.2259 | .8 |
| Interaction terms:1 | ||||
| Surgery and chronic DRG's | 4.4381 | 1.6 | 3.9314 | 2.5 |
| Surgery and intermediate DRG's | — | — | 5.5840 | 1.8 |
| Poor health and chronic DRG's | — | — | 5.4338 | 1.5 |
| Goodness-of-fit statistics: | ||||
| Hosmer χ2 | p = .47 | p = .71 | ||
| Brown χ2 | p = .68 | p = .99 | ||
1
These terms represent the interaction effects between surgery and DRG category and between poor perceived health status and DRG category.
2
Significant at p <. 001 level.
3
Significant at p < .01 level.
4
Significant at p <.1 level.
5
Significant at p < .05 level.
NOTE: DRG is diagnosis-related group.
SOURCE: University of Michigan, School of Public Health: Data from the study, A Health Status Measure for Adjusting the Health Maintenance Organization Capitation Rates of Medicare Beneficiaries, Health Care Financing Grant No. 18-P-98179/5-01 Ann Arbor, Mich., 1982-84.