Data
642,745 items of data are available, covering 500,788 participants.
Defined-instances run from 0 to 3, labelled using Instancing 
2.
| 
| Maximum | 7 |  | Decile 9 | 7 |  | Decile 8 | 7 |  | Decile 7 | 7 |  | Decile 6 | 6 |  | Median | 6 |  | Decile 4 | 6 |  | Decile 3 | 6 |  | Decile 2 | 6 |  | Decile 1 | 6 |  | Minimum | 0 |  |   | 
There are 4 distinct values.Mean = 6.14289Std.dev = 0.88206753619 items below graph minimum of 5 | 
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
500,725 participants, 500,725 items
| 
| Maximum | 7 |  | Decile 9 | 7 |  | Decile 8 | 7 |  | Decile 7 | 6 |  | Decile 6 | 6 |  | Median | 6 |  | Decile 4 | 6 |  | Decile 3 | 6 |  | Decile 2 | 6 |  | Decile 1 | 6 |  | Minimum | 0 |  |   | 
There are 3 distinct values.Mean = 6.22104Std.dev = 0.5521561582 items below graph minimum of 5 | 
Instance 1 : First repeat assessment visit (2012-13)
20,314 participants, 20,314 items
| 
| Maximum | 7 |  | Decile 9 | 7 |  | Decile 8 | 7 |  | Decile 7 | 7 |  | Decile 6 | 7 |  | Median | 7 |  | Decile 4 | 7 |  | Decile 3 | 7 |  | Decile 2 | 7 |  | Decile 1 | 7 |  | Minimum | 0 |  |   | 
There are 2 distinct values.Mean = 6.97864Std.dev = 0.38612962 items below graph minimum of 6 | 
Instance 2 : Imaging visit (2014+)
100,744 participants, 100,744 items
| 
| Maximum | 7 |  | Decile 9 | 7 |  | Decile 8 | 7 |  | Decile 7 | 7 |  | Decile 6 | 7 |  | Median | 7 |  | Decile 4 | 4 |  | Decile 3 | 4 |  | Decile 2 | 4 |  | Decile 1 | 4 |  | Minimum | 0 |  |   | 
There are 3 distinct values.Mean = 5.58158Std.dev = 1.57573 | 
Instance 3 : First repeat imaging visit (2019+)
20,962 participants, 20,962 items
| 
| Maximum | 7 |  | Decile 9 | 7 |  | Decile 8 | 7 |  | Decile 7 | 7 |  | Decile 6 | 7 |  | Median | 7 |  | Decile 4 | 7 |  | Decile 3 | 7 |  | Decile 2 | 4 |  | Decile 1 | 4 |  | Minimum | 0 |  |   | 
There are 3 distinct values.Mean = 6.16401Std.dev = 1.46937 | 
Notes
Blood, count of sample barcodes recorded
Each barcode corresponds to a sample collected in the assessment centre. However the actual volume collected was not always the full amount preferred.