Data
221,245 items of data are available, covering 199,381 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 | 111 |
| Decile 9 | 89 |
| Decile 8 | 86 |
| Decile 7 | 84 |
| Decile 6 | 81 |
| Median | 79 |
| Decile 4 | 76 |
| Decile 3 | 74 |
| Decile 2 | 71 |
| Decile 1 | 68 |
| Minimum | 60 |
|
|
- There are 50 distinct values.
- Mean = 78.8006
- Std.dev = 8.18866
- 1 item above graph maximum of 110
- 226 items have value -3 (Prefer not to answer)
- 1642 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
199,270 participants, 199,270 items
| Maximum | 107 |
| Decile 9 | 89 |
| Decile 8 | 86 |
| Decile 7 | 83 |
| Decile 6 | 81 |
| Median | 78 |
| Decile 4 | 76 |
| Decile 3 | 73 |
| Decile 2 | 71 |
| Decile 1 | 67 |
| Minimum | 60 |
|
|
- There are 48 distinct values.
- Mean = 78.2684
- Std.dev = 8.1475
- 221 items have value -3 (Prefer not to answer)
- 1581 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
5,861 participants, 5,861 items
| Maximum | 105 |
| Decile 9 | 92 |
| Decile 8 | 89 |
| Decile 7 | 87 |
| Decile 6 | 85 |
| Median | 83 |
| Decile 4 | 80 |
| Decile 3 | 78 |
| Decile 2 | 75 |
| Decile 1 | 72 |
| Minimum | 62 |
|
|
- There are 43 distinct values.
- Mean = 82.1608
- Std.dev = 7.41813
- 2 items have value -3 (Prefer not to answer)
- 20 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
14,764 participants, 14,764 items
| Maximum | 111 |
| Decile 9 | 93 |
| Decile 8 | 90 |
| Decile 7 | 88 |
| Decile 6 | 86 |
| Median | 84 |
| Decile 4 | 82 |
| Decile 3 | 80 |
| Decile 2 | 78 |
| Decile 1 | 75 |
| Minimum | 62 |
|
|
- There are 48 distinct values.
- Mean = 84.0774
- Std.dev = 6.66361
- 3 items have value -3 (Prefer not to answer)
- 37 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
1,350 participants, 1,350 items
| Maximum | 103 |
| Decile 9 | 93 |
| Decile 8 | 90 |
| Decile 7 | 88 |
| Decile 6 | 86 |
| Median | 84 |
| Decile 4 | 83 |
| Decile 3 | 81 |
| Decile 2 | 79 |
| Decile 1 | 76 |
| Minimum | 67 |
|
|
- There are 36 distinct values.
- Mean = 84.5669
- Std.dev = 6.10595
- 4 items have value -1 (Do not know)
|
Notes
ACE touchscreen question "What is her age now?"
The following checks were performed:
- If answer < Participants age + 10 years then rejected
- If answer > 122 then rejected
- If answer < Participants age + 14 years then participant asked to confirm
- If answer > 105 then participant asked to confirm
Field 1845 was collected from participants who indicated their mother is still alive, as defined by their answers to Field 1835 or, if they are adopted, their adopted mother is still alive, 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"
