Table 1.
Summary of Data
| Mean | Minimum | Maximum | |
|---|---|---|---|
| Enrollee demographics | |||
| Age | 41.7 | 18 | 107 |
| Female | 59.30% | ||
| Prior-year health status | |||
| No diagnosis history | 8.39% | ||
| Healthy users | 11.61% | ||
| Low health risk | 14.36% | ||
| Moderate health risk | 48.58% | ||
| High health risk | 13.08% | ||
| Very high health risk | 3.99% | ||
| Neighborhood effects | |||
| % Less than high school/GED | 7.39% | 0.00% | 64.30% |
| % High school/GED but no Bachelor’s degree | 56.32% | 0.00% | 85.80% |
| % Bachelor’s degree or greater | 36.29% | 0.40% | 95.10% |
| % White, non-Hispanic | 84.16% | 0.00% | 100.00% |
| % Speaking English only | 87.89% | 0.00% | 100.00% |
| % Households with income below the federal poverty limit | 8.71% | 0.00% | 92.40% |
| Product | |||
| Broad PPO plan | 66.06% | ||
| Restricted network with medical home designation | 16.50% | ||
| Managed Medicaid plan | 17.44% | ||
| Person-years | |||
| Attributed clinic system | |||
| Treatment groups | |||
| Acquired clinic system (Acq1A) | 55,368 | ||
| Acquired clinic system (Acq2) | 38,740 | ||
| Acquired clinic system (Acq1B) | 20,283 | ||
| Control groups | |||
| Clinic system in acquiring integrated delivery system (IDS1) | 322,378 | ||
| Clinic system in acquiring integrated delivery system (IDS2) | 144,505 | ||
| Clinic system in integrated delivery system (IDS3) | 220,142 | ||
| Clinic system in integrated delivery system (IDS4) | 73,229 | ||
| Clinic system in integrated delivery system (IDS5) | 39,919 | ||
| Physician-owned multispecialty clinic system (MS1) | 30,955 | ||
| Physician-owned multispecialty clinic system (MS2) | 20,239 | ||
| Physician-owned primary care clinic system (PC1) | 32,204 | ||
| Physician-owned primary care clinic system (PC2) | 14,278 | ||
| Calendar years | |||
| 2006 | 180,001 | ||
| 2007 | 174,194 | ||
| 2008 | 168,958 | ||
| 2009 | 160,750 | ||
| 2010 | 163,405 | ||
| 2011 | 164,932 | ||