Data
452,202 items of data are available, covering 388,826 participants.
Some values have special meanings defined by Data-Coding
100291.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Units of measurement are years.
| Maximum | 120 |
| Decile 9 | 86 |
| Decile 8 | 82 |
| Decile 7 | 79 |
| Decile 6 | 76 |
| Median | 72 |
| Decile 4 | 69 |
| Decile 3 | 65 |
| Decile 2 | 61 |
| Decile 1 | 54 |
| Minimum | 10 |
|
|
- There are 107 distinct values.
- Mean = 71.0077
- Std.dev = 13.0831
- 1 item above graph maximum of 118
- 477 items have value -3 (Prefer not to answer)
- 11930 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
377,999 participants, 377,999 items
| Maximum | 120 |
| Decile 9 | 86 |
| Decile 8 | 82 |
| Decile 7 | 78 |
| Decile 6 | 75 |
| Median | 72 |
| Decile 4 | 69 |
| Decile 3 | 65 |
| Decile 2 | 60 |
| Decile 1 | 53 |
| Minimum | 10 |
|
|
- There are 106 distinct values.
- Mean = 70.5575
- Std.dev = 13.0168
- 1 item above graph maximum of 119
- 443 items have value -3 (Prefer not to answer)
- 10578 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
16,962 participants, 16,962 items
| Maximum | 118 |
| Decile 9 | 88 |
| Decile 8 | 84 |
| Decile 7 | 80 |
| Decile 6 | 77 |
| Median | 74 |
| Decile 4 | 70 |
| Decile 3 | 67 |
| Decile 2 | 62 |
| Decile 1 | 55 |
| Minimum | 18 |
|
|
- There are 88 distinct values.
- Mean = 72.2473
- Std.dev = 13.0014
- 4 items have value -3 (Prefer not to answer)
- 334 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
52,717 participants, 52,717 items
| Maximum | 110 |
| Decile 9 | 89 |
| Decile 8 | 85 |
| Decile 7 | 82 |
| Decile 6 | 79 |
| Median | 75 |
| Decile 4 | 72 |
| Decile 3 | 68 |
| Decile 2 | 63 |
| Decile 1 | 56 |
| Minimum | 10 |
|
|
- There are 96 distinct values.
- Mean = 73.5526
- Std.dev = 13.2335
- 1 item above graph maximum of 110
- 28 items have value -3 (Prefer not to answer)
- 947 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
4,524 participants, 4,524 items
| Maximum | 107 |
| Decile 9 | 89 |
| Decile 8 | 85 |
| Decile 7 | 82 |
| Decile 6 | 79 |
| Median | 75 |
| Decile 4 | 72 |
| Decile 3 | 69 |
| Decile 2 | 64 |
| Decile 1 | 56 |
| Minimum | 15 |
|
|
- There are 81 distinct values.
- Mean = 73.9054
- Std.dev = 13.0287
- 2 items have value -3 (Prefer not to answer)
- 71 items have value -1 (Do not know)
|
Notes
ACE touchscreen question "What was his age when he died?"
The following checks were performed:
- If answer < 10 then rejected
- If answer > 122 then rejected
- If answer < 15 then participant asked to confirm
- If answer > 105 then participant asked to confirm
Field 1807 was collected from participants who indicated their father has died, as defined by their answers to Field 1797 or, if they are adopted, their adopted father has died, as defined by their answers to Field 1797
Coding 100291 defines 2 special values:
- -1 represents "Do not know"
- -3 represents "Prefer not to answer"
