Table 1.
Demographics of the participants. The Duke site has the subset of subjects scanned with QSM in parenthesis
| Site | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UPMC | SRI | Duke | OHSU | UCSD | ||||||||
| Male | Female | Male | Female | Male | Female | Male | Female | Male | Female | |||
| Visit 0 (QSM) | N | 25 38% | 41 62% | 53 56% | 42, 44% | 49 43% (46, 44%) | 66 57% (58, 56%) | 51 49% | 53 51% | 67 50% | 66 50% | |
| Age (years) | 16.3 ± 2.53 | 16.2 ± 2.46 | 15.1 ± 1.89 | 15.4 ± 2.13 | 15.2 ± 1.52 (15.08 ± 1.47) | 15.1 ± 2.00 (14.95 ± 1.96) | 15.9 ± 2.75 | 16.4 ± 2.66 | 16.3 ± 2.49 | 15.0 ± 2.39 | ||
| Ethnicity | Asian | 0, 0% | 2, 5% | 9, 17% | 8, 19% | 4, 8% (4, 9%) | 3, 5% (3, 5%) | 7, 14% | 7, 13% | 9, 13% | 7, 11% | |
| Black | 4, 16% | 10, 24% | 1, 2% | 0, 0% | 16, 33% (15, 33%) | 29, 44% (23, 40%) | 1, 2% | 2, 4% | 1, 1% | 9, 14% | ||
| White | 21, 84% | 29, 71% | 41, 77% | 33, 79% | 29, 59% (27, 59%) | 33, 50% (31, 53%) | 41, 80% | 42, 79% | 55, 82% | 48, 73% | ||
| Mixed | 0, 0% | 0, 0% | 2, 4% | 1, 2% | 0, 0% (0, 0%) | 1, 2% (1, 2%) | 2, 4% | 2, 4% | 2, 3% | 2, 3% | ||
| Visit 1 | N | 20, 42% | 28, 58% | 34, 53% | 30, 47% | 31, 39% | 48, 61% | 39, 46% | 45, 54% | 54, 49% | 56, 51% | |
| Age (years) | 17.4 ± 2.52 | 18.1 ± 2.27 | 16.5 ± 1.87 | 16.1 ± 2.24 | 16.1 ± 1.39 | 16.1 ± 2.01 | 17.2 ± 2.63 | 17.6 ± 2.75 | 17.6 ± 2.36 | 16.8 ± 2.41 | ||
| Ethnicity | Asian | 0, 0% | 2, 7% | 7, 21% | 6, 20% | 2, 6% | 1, 2% | 4, 10% | 5, 11% | 6, 11% | 7, 12% | |
| Black | 3, 15% | 6, 21% | 0, 0% | 1, 3% | 11, 35% | 22, 46% | 1, 3% | 2, 4% | 1, 2% | 8, 14% | ||
| White | 17, 85% | 20, 71% | 26, 76% | 23, 77% | 18, 58% | 24, 50% | 33, 85% | 37, 82% | 47, 87% | 41, 73% | ||
| Mixed | 0, 0% | 0, 0% | 1, 3% | 1, 3% | 0, 0% | 1, 2% | 1, 3% | 1, 2% | 0, 0% | 0, 0% | ||
OHSU = Oregon Health & Science University; QSM = quantitative susceptibility mapping; UCSD = University of California San Diego; UPMC = University of Pittsburgh Medical Center; SRI = SRI International.