Characteristics of the Study Population (N = 432)
| Characteristic | Before Period (n = 180) | Diffusion Period (n = 87) | After Period (n = 165) | PValue* |
|---|---|---|---|---|
| PSA = prostate-specific antigen. | ||||
| * Calculated across the 3 time periods using the Kruskal-Wallis test. | ||||
| † Aggregate P value for population characteristic. | ||||
| Age, mean, years | 58 | 57 | 56 | 0.13 |
| Race, % | ||||
| White | 89 | 91 | 93 | 0.59 |
| African American | 3 | 2 | 2 | 1.00 |
| College education or higher, % | 85 | 85 | 82 | 0.64 |
| Prior testing for PSA, % | 70 | 70 | 65 | 0.41 |
| Type of physician seen, % | 0.02† | |||
| Faculty | 77 | 70 | 65 | |
| Second-year resident | 7 | 12 | 18 | |
| Third-year resident | 16 | 18 | 16 | |
| Group randomized to, % | 0.39† | |||
| Control | 17 | 16 | 13 | |
| Brochure decision aid | 39 | 32 | 43 | |
| Web-based decision aid | 44 | 52 | 44 | |