Data
286,644 items of data are available, covering 236,187 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 | 143 |
| Decile 1 | 127 |
| Minimum | 0 |
|
|
- There are 946 distinct values.
- Mean = 199.114
- Std.dev = 84.4687
- 2768 items above graph maximum of 441
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
170,470 participants, 170,470 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 = 201.854
- Std.dev = 73.053
- 1595 items above graph maximum of 446
|
Instance 1 : First repeat assessment visit (2012-13)
20,199 participants, 20,199 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 = 181.818
- Std.dev = 65.2349
- 146 items above graph maximum of 402
|
Instance 2 : Imaging visit (2014+)
83,946 participants, 83,946 items
| Maximum | 7761 |
| Decile 9 | 282 |
| Decile 8 | 250 |
| Decile 7 | 224 |
| Decile 6 | 201 |
| Median | 183 |
| Decile 4 | 169 |
| Decile 3 | 156 |
| Decile 2 | 143 |
| Decile 1 | 127 |
| Minimum | 0 |
|
|
- There are 703 distinct values.
- Mean = 199.122
- Std.dev = 108.152
- 938 items above graph maximum of 437
|
Instance 3 : First repeat imaging visit (2019+)
12,029 participants, 12,029 items
| Maximum | 1411 |
| Decile 9 | 275 |
| Decile 8 | 239.5 |
| Decile 7 | 211 |
| Decile 6 | 190 |
| Median | 174 |
| Decile 4 | 162 |
| Decile 3 | 150 |
| Decile 2 | 138 |
| Decile 1 | 120 |
| Minimum | 66 |
|
|
- There are 418 distinct values.
- Mean = 189.282
- Std.dev = 70.0877
- 99 items above graph maximum of 430
|
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.
