Table 2.
Variable Names and Descriptions
| Variable | Description |
|---|---|
| Time variables | |
| Time | A value, ranging from 1–72, representing the month of the study period |
| Time squared | The time variable squared |
| FY1992 | A factor that accounts for a one year increase in costs and allows this increase not to be confused with the PCCM program effects |
| Patient variables | |
| Proportion age 1–4 years | Proportion of Medicaid non-HMO enrolled population age 1–4 years |
| Proportion age 5–14 years | Proportion of Medicaid non-HMO enrolled population age 5–14 years |
| Proportion age 21–25 years | Proportion of Medicaid non-HMO enrolled population age 21–25 years |
| Proportion age 26–44 years | Proportion of Medicaid non-HMO enrolled population age 26–44 years |
| Proportion age 45–49 years | Proportion of Medicaid non-HMO enrolled population age 45–49 years |
| Proportion age 50 years and older | Proportion of Medicaid non-HMO enrolled population age older than 50 years |
| Gender | Proportion of non-HMO enrolled females in the county |
| County variables | A set of variables representing the counties and controlling for county-level effects, such as urban–rural status or physician supply |
| HMO variables | |
| HMO share | The proportion of recipients in the county enrolled in an HMO |
| HMO share squared | HMO share value squared |
| MediPASS Program variables | |
| Program | Valued at 1 if the county was in the PCCM program and 0 if it was not |
| Program share | Proportion of non-HMO enrollees in the county enrolled in the PCCM program |
| Program share squared | Program share squared |
| Program time | Number of months the county has been in the PCCM program |
| Program time × MediPASS share | Interaction between program share and program time |
| Dependent variable | |
| C1—Inpatient services | Any care received during a hospital stay |
| C2—Outpatient services | Any care received on an outpatient basis from a hospital |
| C3—Physician services | Any care provided by a physician |
| C4—Laboratory and radiological | All laboratory and radiological procedures billed on a separate claim |
| C5—Pharmaceutical | All prescription drugs that were dispensed by a pharmacy |
| C6—Special services requiring physician approval | Services that do not fit one of the above categories but required approval by the patient manager. All claims with provider categories of medical supplies, pediatric services, and home health care. |
| C7—Special services not requiring physician approval | Services that are unrelated to managed services. All claims with provider categories of optometric, chiropractic, family planning, and EPSDT services |
| C8—Dental care | Services provided by a dentist |
PCCM, primary care case management; HMO, health maintenance organization.
EPSDT, Early and Periodic Screening, Diagnostic and Treatment.