Data
408,725 items of data are available, covering 329,357 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 | 110 |
| Decile 9 | 90 |
| Decile 8 | 86 |
| Decile 7 | 84 |
| Decile 6 | 81 |
| Median | 78 |
| Decile 4 | 74 |
| Decile 3 | 70 |
| Decile 2 | 65 |
| Decile 1 | 57 |
| Minimum | 10 |
|
|
- There are 99 distinct values.
- Mean = 75.3616
- Std.dev = 13.3631
- 2 items above graph maximum of 110
- 291 items have value -3 (Prefer not to answer)
- 6901 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
298,173 participants, 298,173 items
| Maximum | 109 |
| Decile 9 | 89 |
| Decile 8 | 85 |
| Decile 7 | 82 |
| Decile 6 | 80 |
| Median | 76 |
| Decile 4 | 73 |
| Decile 3 | 69 |
| Decile 2 | 64 |
| Decile 1 | 56 |
| Minimum | 10 |
|
|
- There are 98 distinct values.
- Mean = 74.1304
- Std.dev = 13.2488
- 247 items have value -3 (Prefer not to answer)
- 5688 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
14,372 participants, 14,372 items
| Maximum | 104 |
| Decile 9 | 91 |
| Decile 8 | 87 |
| Decile 7 | 84 |
| Decile 6 | 82 |
| Median | 79 |
| Decile 4 | 76 |
| Decile 3 | 72 |
| Decile 2 | 67 |
| Decile 1 | 59 |
| Minimum | 21 |
|
|
- There are 84 distinct values.
- Mean = 76.56
- Std.dev = 13.0433
- 2 items have value -3 (Prefer not to answer)
- 192 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
78,853 participants, 78,853 items
| Maximum | 109 |
| Decile 9 | 93 |
| Decile 8 | 90 |
| Decile 7 | 87 |
| Decile 6 | 84 |
| Median | 82 |
| Decile 4 | 78 |
| Decile 3 | 74 |
| Decile 2 | 69 |
| Decile 1 | 61 |
| Minimum | 13 |
|
|
- There are 96 distinct values.
- Mean = 78.907
- Std.dev = 13.099
- 34 items have value -3 (Prefer not to answer)
- 810 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
17,327 participants, 17,327 items
| Maximum | 110 |
| Decile 9 | 93 |
| Decile 8 | 90 |
| Decile 7 | 87 |
| Decile 6 | 84 |
| Median | 82 |
| Decile 4 | 79 |
| Decile 3 | 75 |
| Decile 2 | 70 |
| Decile 1 | 61 |
| Minimum | 20 |
|
|
- There are 89 distinct values.
- Mean = 79.2326
- Std.dev = 13.0394
- 2 items above graph maximum of 110
- 8 items have value -3 (Prefer not to answer)
- 211 items have value -1 (Do not know)
|
Notes
ACE touchscreen question "What was her age when she 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 3526 was collected from participants who indicated their mother has died, as defined by their answers to Field 1835 or, if they are adopted, their adopted mother has died, as defined by their answers to Field 1835
Coding 100291 defines 2 special values:
- -1 represents "Do not know"
- -3 represents "Prefer not to answer"
