Table 2.
Results from the Covariate Control Models
| Probit on Any Hospitalization | Nonlinear Least Squares on Hospital Spending (Restricted to Users) | |||
|---|---|---|---|---|
| Variables* | Coefficient | p-value | Coefficient | p-value |
| Counts of drug use | 0.01 | <.001 | 0.0001 | .95 |
| SSDI disabled (<65) | −0.21 | .07 | 0.32 | .13 |
| Aged/previously disabled | 0.26 | .01 | 0.38 | .03 |
| Age | ||||
| 70–74 | −0.10 | .32 | 0.06 | .71 |
| 75–79 | 0.03 | .80 | 0.21 | .29 |
| 80+ | 0.08 | .42 | 0.04 | .82 |
| Married | −0.06 | .34 | 0.09 | .32 |
| Female | −0.13 | .53 | −0.25 | .009 |
| White | 0.03 | .68 | 0.10 | .45 |
| Nonurban area | −0.04 | .53 | −0.01 | .97 |
| High school graduate | 0.13 | .03 | −0.34 | .002 |
| Midwest | 0.06 | .48 | −.53 | <.001 |
| South | 0.02 | .83 | −0.36 | .01 |
| West | 0.01 | .95 | 0.06 | .72 |
| Income | ||||
| $10,001–$20,000 | −0.14 | .07 | −0.16 | .19 |
| $20,001–$30,000 | −0.16 | .08 | −0.41 | .007 |
| >$30,000 | −0.14 | .14 | 0.30 | .04 |
| Ybase | 0.03 | <.001 | 0.14 | <.001 |
| Constant | −1.28 | <.001 | 9.29 | .74 |
*
Reference groups are as follows: Age 65–69, not formerly disabled, single, male, nonwhite, urban area, East, and income ≤$10,000.