Data
235,521 items of data are available, covering 207,881 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 907 distinct values.
- Mean = 199.093
- Std.dev = 86.9017
- 2260 items above graph maximum of 441
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
170,640 participants, 170,640 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 = 73.0476
- 1597 items above graph maximum of 446
|
Instance 1 : First repeat assessment visit (2012-13)
20,220 participants, 20,220 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 = 181.801
- Std.dev = 65.2171
- 146 items above graph maximum of 402
|
Instance 2 : Imaging visit (2014+)
41,385 participants, 41,385 items
| Maximum | 7761 |
| Decile 9 | 274 |
| Decile 8 | 240 |
| Decile 7 | 214 |
| Decile 6 | 195 |
| Median | 179 |
| Decile 4 | 166 |
| Decile 3 | 155 |
| Decile 2 | 143 |
| Decile 1 | 128 |
| Minimum | 0 |
|
|
- There are 620 distinct values.
- Mean = 195.983
- Std.dev = 135.265
- 553 items above graph maximum of 420
|
Instance 3 : First repeat imaging visit (2019+)
3,276 participants, 3,276 items
| Maximum | 1411 |
| Decile 9 | 285 |
| Decile 8 | 260 |
| Decile 7 | 235 |
| Decile 6 | 211 |
| Median | 189 |
| Decile 4 | 171 |
| Decile 3 | 157 |
| Decile 2 | 144 |
| Decile 1 | 126 |
| Minimum | 66 |
|
|
- There are 306 distinct values.
- Mean = 201.264
- Std.dev = 72.3387
- 22 items above graph maximum of 444
|
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.
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