Data
266,825 items of data are available, covering 226,384 participants.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Units of measurement are milliseconds.
| Maximum | 7761 |
| Decile 9 | 284 |
| Decile 8 | 253 |
| Decile 7 | 227 |
| Decile 6 | 203 |
| Median | 184 |
| Decile 4 | 169 |
| Decile 3 | 156 |
| Decile 2 | 143 |
| Decile 1 | 127 |
| Minimum | 0 |
|
|
- There are 932 distinct values.
- Mean = 199.137
- Std.dev = 85.3137
- 2540 items above graph maximum of 441
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
170,533 participants, 170,533 items
| Maximum | 1614 |
| Decile 9 | 287 |
| Decile 8 | 258 |
| Decile 7 | 232 |
| Decile 6 | 208 |
| Median | 188 |
| Decile 4 | 172 |
| Decile 3 | 158 |
| Decile 2 | 145 |
| Decile 1 | 128 |
| Minimum | 0 |
|
|
- There are 827 distinct values.
- Mean = 201.855
- Std.dev = 73.0508
- 1596 items above graph maximum of 446
|
Instance 1 : First repeat assessment visit (2012-13)
20,213 participants, 20,213 items
| Maximum | 1327 |
| Decile 9 | 260 |
| Decile 8 | 224 |
| Decile 7 | 200 |
| Decile 6 | 182 |
| Median | 169 |
| Decile 4 | 158 |
| Decile 3 | 148 |
| Decile 2 | 136 |
| Decile 1 | 118 |
| Minimum | 62 |
|
|
- There are 431 distinct values.
- Mean = 181.811
- Std.dev = 65.2236
- 146 items above graph maximum of 402
|
Instance 2 : Imaging visit (2014+)
69,419 participants, 69,419 items
| Maximum | 7761 |
| Decile 9 | 280 |
| Decile 8 | 248 |
| Decile 7 | 221 |
| Decile 6 | 199 |
| Median | 182 |
| Decile 4 | 168 |
| Decile 3 | 155 |
| Decile 2 | 143 |
| Decile 1 | 127 |
| Minimum | 0 |
|
|
- There are 674 distinct values.
- Mean = 197.657
- Std.dev = 113.984
- 770 items above graph maximum of 433
|
Instance 3 : First repeat imaging visit (2019+)
6,660 participants, 6,660 items
| Maximum | 1411 |
| Decile 9 | 284 |
| Decile 8 | 256 |
| Decile 7 | 228 |
| Decile 6 | 203 |
| Median | 183 |
| Decile 4 | 167 |
| Decile 3 | 154 |
| Decile 2 | 141 |
| Decile 1 | 123 |
| Minimum | 66 |
|
|
- There are 356 distinct values.
- Mean = 197.565
- Std.dev = 74.1692
- 44 items above graph maximum of 445
|
Notes
peak to peak time in milliseconds
A digital volume pulse can be considered to be the summation of a direct and a reflected component. The direct component is due to transmission of a pressure wave from the left ventricle to the finger via the most direct route. The reflected component is formed by pressure transmitted from the heart to the lower body where it is reflected back up the aorta and thence to the finger. peak to peak time is the difference between the peak values of direct and reflected components.
