Data
507,960 items of data are available, covering 488,512 participants.
Defined-instances run from 0 to 1, labelled using Instancing 
2.
Units of measurement are nm.
| 
| Maximum | 25.16 |  | Decile 9 | 24.0367 |  | Decile 8 | 24.0063 |  | Decile 7 | 23.9823 |  | Decile 6 | 23.96 |  | Median | 23.938 |  | Decile 4 | 23.915 |  | Decile 3 | 23.889 |  | Decile 2 | 23.857 |  | Decile 1 | 23.8088 |  | Minimum | 23.033 |  |   | 
Mean = 23.9287Std.dev = 0.0906658814 items below graph minimum of 23.58094 items above graph maximum of 24.2647 | 
2 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
488,083 participants, 488,083 items
| 
| Maximum | 25.16 |  | Decile 9 | 24.037 |  | Decile 8 | 24.0066 |  | Decile 7 | 23.9826 |  | Decile 6 | 23.96 |  | Median | 23.9383 |  | Decile 4 | 23.915 |  | Decile 3 | 23.889 |  | Decile 2 | 23.857 |  | Decile 1 | 23.8087 |  | Minimum | 23.033 |  |   | 
Mean = 23.9288Std.dev = 0.0907439783 items below graph minimum of 23.58044 items above graph maximum of 24.2653 | 
Instance 1 : First repeat assessment visit (2012-13)
19,877 participants, 19,877 items
| 
| Maximum | 24.183 |  | Decile 9 | 24.033 |  | Decile 8 | 24.003 |  | Decile 7 | 23.979 |  | Decile 6 | 23.958 |  | Median | 23.936 |  | Decile 4 | 23.9134 |  | Decile 3 | 23.888 |  | Decile 2 | 23.857 |  | Decile 1 | 23.81 |  | Minimum | 23.429 |  |   | 
Mean = 23.9271Std.dev = 0.088711529 items below graph minimum of 23.587 |