Table 4.
Descriptive Statistics of Prevalent Users in “Same Criteria, Different Time” Analysis
| Number of Subjects | Cohort #1 | Cohort #2 | Cohort #3 | Cohort #4 |
|---|---|---|---|---|
| 6,248 | 6,383 | 6,245 | 6,129 | |
| Index date | August 1, 2001 | February 1, 2002 | August 1, 2002 | February 1, 2003 |
| Original or alternative cohort | Alternative 1 | True-event | Alternative 2 | Alternative 3 |
| Age (mean/SD) | 64.1 (10.5) | 64.1 (10.5) | 64.1 (10.5) | 63.9 (10.5) |
| <56 years (%) | 24.9 | 25.0 | 25 | 25.5 |
| 56–65 (%) | 25.1 | 25.2 | 25.1 | 25.4 |
| 66–75 (%) | 34.9 | 34.8 | 35.1 | 34.6 |
| 76–85 (%) | 14.8 | 14.7 | 14.6 | 14.2 |
| >85 (%) | <1 | <1 | <1 | <1 |
| Female (%) | 1.9 | 2.2 | 2.3 | 2.0 |
| Married (%) | 60.8 | 60.9 | 60.9 | 60.7 |
| White (%) | 64.5 | 64.9 | 64.9 | 64.3 |
| Nonwhite (%) | 15.7 | 15.3 | 15.4 | 16.0 |
| Unknown race (%) | 19.9 | 19.8 | 19.7 | 19.7 |
| Copay exempt from low income (%) | 48.2 | 48.0 | 47.8 | 47.4 |
| Copay exempt from disability (%) | 36.4 | 36.6 | 37.0 | 37.2 |
| Must pay copay (%) | 15.4 | 15.4 | 15.2 | 15.4 |
| DCG score (mean/SD) | 0.97 (1.33) | 0.96 (1.35) | 0.95 (1.32) | 0.95 (1.31) |
| Diabetes complication severity index | 2.10 (1.73) | 2.07 (1.71) | 2.05 (1.71) | 2.03 (1.69) |
| Hypertension (%) | 68.4 | 68.9 | 68.4 | 68.6 |
| Overlap: % of original cohort present | 100 | 88.3 | 84.1 | 80.7 |
Note: All comparisons are statistically insignificant.