Data
87,996 items of data are available, covering 83,313 participants.
Defined-instances run from 2 to 3, labelled using Instancing 
2.
Units of measurement are AU.
| 
| Maximum | 37.3212 |  | Decile 9 | 30.0139 |  | Decile 8 | 29.0304 |  | Decile 7 | 28.3046 |  | Decile 6 | 27.6834 |  | Median | 27.0759 |  | Decile 4 | 26.462 |  | Decile 3 | 25.7691 |  | Decile 2 | 24.9318 |  | Decile 1 | 23.7462 |  | Minimum | 16.0813 |  |   | 
Mean = 26.969Std.dev = 2.4637114 items below graph minimum of 17.47847 items above graph maximum of 36.2816 | 
2 Instances
Instance 2 : Imaging visit (2014+)
83,241 participants, 83,241 items
| 
| Maximum | 37.3212 |  | Decile 9 | 30.0387 |  | Decile 8 | 29.0453 |  | Decile 7 | 28.3064 |  | Decile 6 | 27.6816 |  | Median | 27.0675 |  | Decile 4 | 26.449 |  | Decile 3 | 25.7594 |  | Decile 2 | 24.9171 |  | Decile 1 | 23.7315 |  | Minimum | 16.2232 |  |   | 
Mean = 26.9679Std.dev = 2.4758713 items below graph minimum of 17.42426 items above graph maximum of 36.3459 | 
Instance 3 : First repeat imaging visit (2019+)
4,755 participants, 4,755 items
| 
| Maximum | 34.7887 |  | Decile 9 | 29.6298 |  | Decile 8 | 28.8408 |  | Decile 7 | 28.2668 |  | Decile 6 | 27.7282 |  | Median | 27.2146 |  | Decile 4 | 26.6605 |  | Decile 3 | 25.9588 |  | Decile 2 | 25.1535 |  | Decile 1 | 24.0562 |  | Minimum | 16.0813 |  |   | 
Mean = 26.9875Std.dev = 2.240122 items below graph minimum of 18.4827 | 
Notes
Grey-white contrast in superiorfrontal in the left hemisphere calculated as a percentage of the mean gray-white matter intensity from Desikan-Killiany parcellation
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