| Characteristic | Treatment Group (N = 15) | Control Group (N = 15) |
| Mean ± SD age, years | 43.4 ± 11.7 | 42.1 ± 12.3 |
| No. (%) African American | 15 (100) | 15 (100) |
| No. (%) female | 14 (93) | 14 (93) |
| No. (%) attended trade school* | 2 (15) | 6 (46) |
| No. (%) attended college* | 4 (31) | 4 (31) |