Data
127,746 items of data are available, covering 114,639 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 | 88 |
| Decile 8 | 85 |
| Decile 7 | 83 |
| Decile 6 | 81 |
| Median | 78 |
| Decile 4 | 76 |
| Decile 3 | 74 |
| Decile 2 | 72 |
| Decile 1 | 69 |
| Minimum | 60 |
|
|
- There are 49 distinct values.
- Mean = 78.4876
- Std.dev = 7.45898
- 2 items above graph maximum of 107
- 184 items have value -3 (Prefer not to answer)
- 1653 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
114,521 participants, 114,521 items
| Maximum | 110 |
| Decile 9 | 87 |
| Decile 8 | 84 |
| Decile 7 | 82 |
| Decile 6 | 80 |
| Median | 78 |
| Decile 4 | 76 |
| Decile 3 | 74 |
| Decile 2 | 71 |
| Decile 1 | 68 |
| Minimum | 60 |
|
|
- There are 48 distinct values.
- Mean = 77.8681
- Std.dev = 7.33931
- 2 items above graph maximum of 106
- 177 items have value -3 (Prefer not to answer)
- 1561 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
3,113 participants, 3,113 items
| Maximum | 101 |
| Decile 9 | 90 |
| Decile 8 | 87 |
| Decile 7 | 85 |
| Decile 6 | 83 |
| Median | 82 |
| Decile 4 | 80 |
| Decile 3 | 78 |
| Decile 2 | 75 |
| Decile 1 | 73 |
| Minimum | 64 |
|
|
- There are 38 distinct values.
- Mean = 81.5452
- Std.dev = 6.67549
- 2 items have value -3 (Prefer not to answer)
- 24 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
9,191 participants, 9,191 items
| Maximum | 107 |
| Decile 9 | 92 |
| Decile 8 | 90 |
| Decile 7 | 88 |
| Decile 6 | 86 |
| Median | 85 |
| Decile 4 | 83 |
| Decile 3 | 81 |
| Decile 2 | 79 |
| Decile 1 | 76 |
| Minimum | 65 |
|
|
- There are 40 distinct values.
- Mean = 84.4292
- Std.dev = 6.01198
- 5 items have value -3 (Prefer not to answer)
- 61 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
921 participants, 921 items
| Maximum | 99 |
| Decile 9 | 92 |
| Decile 8 | 90 |
| Decile 7 | 88 |
| Decile 6 | 87 |
| Median | 85 |
| Decile 4 | 84 |
| Decile 3 | 82 |
| Decile 2 | 80 |
| Decile 1 | 78 |
| Minimum | 69 |
|
|
- There are 30 distinct values.
- Mean = 85.2834
- Std.dev = 5.34843
- 7 items have value -1 (Do not know)
|
Notes
ACE touchscreen question "What is his 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 2946 was collected from participants who indicated their father is still alive, as defined by their answers to Field 1797 or, if they are adopted, their adopted father is still alive, 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"
3 Related Data-Fields
| Field ID | Description | Relationship |
|---|
| 3912 | Adopted father still alive | Field 3912 affects who was asked to answer Current Field |
| 1797 | Father still alive | Field 1797 affects who was asked to answer Current Field |
| 1845 | Mother's age | Field 1845 is maternal counterpart of paternal Current Field |
