Data
485,504 items of data are available, covering 395,775 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 | 87 |
| Decile 8 | 83 |
| Decile 7 | 79 |
| Decile 6 | 76 |
| Median | 73 |
| Decile 4 | 70 |
| Decile 3 | 65 |
| Decile 2 | 61 |
| Decile 1 | 54 |
| Minimum | 10 |
|
|
- There are 108 distinct values.
- Mean = 71.288
- Std.dev = 13.1463
- 505 items have value -3 (Prefer not to answer)
- 12595 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
377,843 participants, 377,843 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 = 70.5577
- Std.dev = 13.0171
- 1 item above graph maximum of 119
- 443 items have value -3 (Prefer not to answer)
- 10575 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
16,956 participants, 16,956 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 = 72.2467
- Std.dev = 13.0006
- 4 items have value -3 (Prefer not to answer)
- 334 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
79,311 participants, 79,311 items
| Maximum | 116 |
| Decile 9 | 90 |
| Decile 8 | 86 |
| Decile 7 | 82 |
| Decile 6 | 79 |
| Median | 76 |
| Decile 4 | 72 |
| Decile 3 | 68 |
| Decile 2 | 63 |
| Decile 1 | 56 |
| Minimum | 10 |
|
|
- There are 98 distinct values.
- Mean = 74.0864
- Std.dev = 13.3141
- 55 items have value -3 (Prefer not to answer)
- 1483 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
11,394 participants, 11,394 items
| Maximum | 107 |
| Decile 9 | 90 |
| Decile 8 | 86 |
| Decile 7 | 83 |
| Decile 6 | 79 |
| Median | 76 |
| Decile 4 | 72 |
| Decile 3 | 69 |
| Decile 2 | 64 |
| Decile 1 | 56 |
| Minimum | 15 |
|
|
- There are 90 distinct values.
- Mean = 74.3558
- Std.dev = 13.2573
- 3 items have value -3 (Prefer not to answer)
- 203 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"
