EXHIBIT 1.
Characteristics Of Study Population: Elderly Medicare Beneficiaries With Drug Coverage Through An Individual Part D Plan Or An Employer-Group Plan, 2006
| Demographic variables | Individual Part D plans | Employer plans | p_value |
|---|---|---|---|
| Female | 60% | 53% | <0.0001 |
| Age (years) | |||
| 65–74 | 44% | 53% | <0.0001 |
| 75–84 | 44 | 39 | <0.0001 |
| 85+ | 12 | 8 | <0.0001 |
| Prospective risk score | 0.96 (0.85) | 1.01 (0.88) | 0.00312 |
|
Diagnosed with selected medical conditions | |||
| Hypertension | |||
| Any | 70% | 69% | 0.1431 |
| Only | 14 | 11 | 0.0002 |
| + Hyperlipidemia | 29 | 32 | 0.003 |
| + CHF | 1 | 1 | 0.7999 |
| + Diabetes | 4 | 4 | 0.5899 |
| + Hyperlipidemia + CHF | 3 | 1 | 0.0005 |
| + Hyperlipidemia + diabetes | 15 | 16 | 0.4513 |
| + CHF + diabetes | 1 | 1 | 0.1720 |
| + Hyperlipidemia + CHF + diabetes | 3 | 2 | 0.1380 |
| Diabetes | |||
| Any | 28 | 27 | 0.6207 |
| Only | 2 | 1 | 0.1924 |
| + Hypertension | 4 | 4 | 0.5899 |
| + Hyperlipidemia | 2 | 3 | 0.3820 |
| + CHF | 0 | 0 | 0.5776 |
| + Hypertension + hyperlipidemia | 15 | 16 | 0.4513 |
| + Hypertension + CHF | 1 | 1 | 0.1720 |
| + Hyperlipidemia + CHF | 0 | 0 | 0.7436 |
| + Hypertension + hyperlipidemia + CHF | 3 | 2 | 0.1380 |
SOURCE: Authors’ calculations using study population as described in the text.
NOTES: For individual Part D plans, n = 11,661 (81 percent of sample). For employer-group plans, n = 2,793 (19 percent of sample). Study sample was defined as age sixty-five and older; continuously enrolled in 2006; and no institutional stay in 2006. “Any” hypertension means patients with hypertension, irrespective of identified chronic illnesses. “Only” hypertension is defined as hypertension without the other major chronic illnesses shown. CHF is congestive heart failure.