Table 2.
Characteristics of Matched Study Groups
| Matching variable | Treatment N=5586 | Comparison N=22,344 |
|---|---|---|
| Age group* | ||
| Younger than 65 |
1.2% |
1.2% |
| 65 to 74 |
63.8% |
63.8% |
| 75 and older |
35.0% |
35.0% |
| Percent female* |
56.4% |
56.4% |
| Race* | ||
| White |
96.1% |
96.1% |
| Black |
1.9% |
1.9% |
| Other |
2.0% |
2.0% |
| Educational level* | ||
| <high school graduate or GED |
5.3% |
5.3% |
| High school graduate or GED |
35.5% |
35.5% |
| Greater than high school or GED |
59.2% |
59.2% |
| Percent married* |
70.2% |
70.2% |
| Percent obese (BMI 30 or above)* |
16.6% |
16.6% |
| Reported disease* | ||
| Congestive heart failure (COPD) |
1.1% |
1.1% |
| Angina pectoris or coronary artery disease |
7.1% |
7.1% |
| Diabetes, high blood sugar, or sugar in urine |
11.7% |
11.7% |
| Emphysema, asthma, or COPD |
6.6% |
6.6% |
| Stroke |
1.9% |
1.9% |
| Number of conditions* | ||
| 0 |
15.7% |
15.7% |
| 1 |
24.7% |
24.7% |
| 2 |
24.5% |
24.5% |
| 3 |
16.8% |
16.8% |
| 4 |
11.0% |
11.0% |
| 5 or more** | 7.4% | 7.4% |
*
Chi-square, P=1.0; **Matching was performed on specific number of conditions up to 9.
BMI, body mass index; GED, general equivalency degree; COPD, chronic obstructive pulmonary disease.