Table 2.
Alternative risk adjustment measures in prospective expenditure models
| Risk adjustment model | Total expenditures |
Inpatient expenditures |
Outpatient expenditures |
|||
|---|---|---|---|---|---|---|
| Adjusted R2 | Rank | Adjusted R2 | Rank | Adjusted R2 | Rank | |
| Age and sex alone (%) | 0.14 | 10 | 0.18 | 10 | 0.22 | 10 |
| Prior-year expenditure | 2.80 | 7 | 0.58 | 7 | 35.10 | 1 |
| Functional status measure | ||||||
| PCS + MCS (from SF-36) | 0.64 | 9 | 0.23 | 9 | 2.59 | 8 |
| Comorbidity measures | ||||||
| CCI (%) | 3.26 | 4 | 1.71 | 3 | 7.75 | 7 |
| SIC | 0.65 | 8 | 0.49 | 8 | 0.79 | 9 |
| Risk adjustment measures | ||||||
| ACG | 3.56 | 3 | 1.33 | 4 | 14.80 | 5 |
| DCG-HCC | 5.58 | 2 | 2.36 | 2 | 19.63 | 3 |
| CDPS | 3.02 | 6 | 0.90 | 6 | 16.25 | 4 |
| RxRisk-V | 3.23 | 5 | 1.33 | 4 | 11.79 | 6 |
| Diabetes-specific measure | ||||||
| Diabetes complications count | 0.10 | 11 | 0.10 | 11 | 0.22 | 10 |
| DCG-HCC + diabetes complications count | 5.80 | 1 | 2.55 | 1 | 20.04 | 2 |
N = 3,092. All self-report and diagnosis-based measures include age and sex. The PCS and MCS were included as distinct explanatory variables in the PCS + MCS model above. Highest R2 values are shown in bold face.