Table 2.
Basic demographics by site.
| Overall | Peking | Brown | KKI | NI | NYU | Oregon | Pitt | WashU | |
|---|---|---|---|---|---|---|---|---|---|
| N | 973 | 245 | 26 | 94 | 73 | 263 | 113 | 98 | 61 |
| PERCENTAGE BY SUBTYPE | |||||||||
| Control | 50 | 47 | 0 | 65 | 32 | 38 | 37 | 91 | 100 |
| Comb. | 17 | 12 | 0 | 17 | 25 | 29 | 20 | 0 | 0 |
| Hyper./Imp. | 1 | 0 | 0 | 1 | 8 | 1 | 2 | 0 | 0 |
| Inatt. | 11 | 20 | 0 | 5 | 1 | 17 | 11 | 0 | 0 |
| Withheld | 20 | 21 | 100 | 12 | 34 | 16 | 30 | 9 | 0 |
| PERCENTAGE BY GENDER | |||||||||
| Female | 38 | 29 | 65 | 40 | 41 | 35 | 46 | 46 | 46 |
| Male | 62 | 71 | 35 | 60 | 59 | 65 | 54 | 54 | 54 |
| PERCENTAGE BY QUALITY CONTROL | |||||||||
| % QC Fail | 22 | 1 | 4 | 6 | 12 | 34 | 28 | 32 | 72 |
| AGE | |||||||||
| Min | 7.09 | 8.08 | 8.50 | 8.02 | 11.05 | 7.17 | 7.17 | 10.11 | 7.09 |
| Median | 11.42 | 11.75 | 14.83 | 10.10 | 17.78 | 11.11 | 8.75 | 14.87 | 10.35 |
| Mean | 12.43 | 11.70 | 14.54 | 10.22 | 17.64 | 11.45 | 9.10 | 15.08 | 11.47 |
| Max | 26.31 | 17.33 | 17.87 | 12.99 | 26.31 | 17.96 | 12.50 | 20.45 | 21.83 |
| Sd | 3.33 | 1.96 | 2.54 | 1.34 | 3.05 | 2.91 | 1.25 | 2.78 | 3.88 |
Acronyms are: Comb., ADHD combined type; Hyper./Imp., ADHD hyperactive impulsive; Inatt., ADHD inattentive; % QC fail, percentage where any imaging quality control flag is listed as failing.