Table. Demographic Characteristics: Discovery Sample.
| Sample | European American individuals | African American individuals | ||||||
|---|---|---|---|---|---|---|---|---|
| No. of cases | No. of controls | Age, mean (SD), y | Female, No. (%) | No. of cases | No. of controls | Age, mean (SD), y | Female, No. (%) | |
| MVP phase 1 | 6367 | 55 429 | 61.2 (13.0) | 5775 (9.3) | 3151 | 20 254 | 57.0 (11.1) | 3400 (14.5) |
| MVP phase 2 | 2162 | 15 771 | 61.2 (13.7) | 1739 (9.7) | 881 | 5775 | 58.0 (11.2) | 1029 (15.5) |
| Subtotal | 8529 | 71 200 | 61.2 (13.2) | 7514 (9.4) | 4032 | 26 029 | 57.2 (11.1) | 4429 (14.7) |
| Yale-Penn 1 | 1043 | 294 | 36.9 (10.3) | 542 (40.5) | 831 | 573 | 42.2 (7.9) | 533 (38.0) |
| Yale-Penn 2 | 724 | 243 | 36.4 (11.4) | 319 (33.0) | 349 | 274 | 42.3 (10.2) | 170 (27.3) |
| Yale-Penn 3 | 54 | 44 | 33.6 (11.6) | 41 (41.8) | NA | NA | NA | NA |
| SAGE | 194 | 382 | 35.8 (9.1) | 195 (33.9) | NA | NA | NA | NA |
| Subtotal | 2015 | 963 | 36.4 (10.5) | 1097 (36.8) | 1180 | 847 | 42.3 (8.6) | 703 (34.7) |
| Total | 10 544 | 72 163 | NA | NA | 5212 | 26 876 | NA | NA |
Abbreviations: MVP, Million Veteran Program; SAGE, Study of Addiction: Genetics and Environment.