Data
243,230 items of data are available, covering 212,133 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 | 226 |
| Decile 6 | 203 |
| Median | 184 |
| Decile 4 | 169 |
| Decile 3 | 156 |
| Decile 2 | 144 |
| Decile 1 | 127 |
| Minimum | 0 |
|
|
- There are 913 distinct values.
- Mean = 199.253
- Std.dev = 86.492
- 2319 items above graph maximum of 441
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
170,616 participants, 170,616 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 = 201.856
- Std.dev = 73.0493
- 1597 items above graph maximum of 446
|
Instance 1 : First repeat assessment visit (2012-13)
20,219 participants, 20,219 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 = 181.802
- Std.dev = 65.2186
- 146 items above graph maximum of 402
|
Instance 2 : Imaging visit (2014+)
47,721 participants, 47,721 items
| Maximum | 7761 |
| Decile 9 | 277 |
| Decile 8 | 243 |
| Decile 7 | 217 |
| Decile 6 | 196 |
| Median | 180 |
| Decile 4 | 167 |
| Decile 3 | 155 |
| Decile 2 | 143 |
| Decile 1 | 127 |
| Minimum | 0 |
|
|
- There are 638 distinct values.
- Mean = 196.697
- Std.dev = 128.67
- 568 items above graph maximum of 427
|
Instance 3 : First repeat imaging visit (2019+)
4,674 participants, 4,674 items
| Maximum | 1411 |
| Decile 9 | 290 |
| Decile 8 | 266 |
| Decile 7 | 242 |
| Decile 6 | 218 |
| Median | 194 |
| Decile 4 | 175 |
| Decile 3 | 160 |
| Decile 2 | 146 |
| Decile 1 | 128 |
| Minimum | 66 |
|
|
- There are 332 distinct values.
- Mean = 205.792
- Std.dev = 73.481
- 30 items above graph maximum of 452
|
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.
