Data
1,136,868 items of data are available, covering 406,816 participants.
Some values have special meanings defined by Data-Coding
13.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Array indices run from 0 to 31.
Units of measurement are years.
| Maximum | 91.5 |
| Decile 9 | 60.8 |
| Decile 8 | 54.7 |
| Decile 7 | 49.1 |
| Decile 6 | 43.5 |
| Median | 38.3 |
| Decile 4 | 32.5 |
| Decile 3 | 26.3 |
| Decile 2 | 18.2 |
| Decile 1 | 8.5 |
| Minimum | 0 |
|
|
- Mean = 36.825
- Std.dev = 18.672
- 57 items have value -3 (Preferred not to answer)
- 15862 items have value -1 (Date uncertain or unknown)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
390,827 participants, 858,618 items
| Maximum | 91.5 |
| Decile 9 | 58.7 |
| Decile 8 | 52.5 |
| Decile 7 | 47.2 |
| Decile 6 | 41.9 |
| Median | 36.8 |
| Decile 4 | 31.5 |
| Decile 3 | 25.5 |
| Decile 2 | 17.5 |
| Decile 1 | 8.5 |
| Minimum | 0 |
|
|
- Mean = 35.4628
- Std.dev = 17.7677
- 53 items have value -3 (Preferred not to answer)
- 8544 items have value -1 (Date uncertain or unknown)
|
Instance 1 : First repeat assessment visit (2012-13)
16,255 participants, 35,144 items
| Maximum | 75.2 |
| Decile 9 | 62.9 |
| Decile 8 | 57.2 |
| Decile 7 | 51.5 |
| Decile 6 | 46.1 |
| Median | 40.3 |
| Decile 4 | 34.1 |
| Decile 3 | 27.1 |
| Decile 2 | 17.7 |
| Decile 1 | 7.5 |
| Minimum | 0 |
|
|
- Mean = 38.0696
- Std.dev = 19.5339
- 1 items have value -3 (Preferred not to answer)
- 102 items have value -1 (Date uncertain or unknown)
|
Instance 2 : Imaging visit (2014+)
76,847 participants, 194,578 items
| Maximum | 86.3 |
| Decile 9 | 67.7 |
| Decile 8 | 61.5 |
| Decile 7 | 55.7 |
| Decile 6 | 50.4 |
| Median | 43.6 |
| Decile 4 | 36.5 |
| Decile 3 | 29.8 |
| Decile 2 | 20.5 |
| Decile 1 | 9.5 |
| Minimum | 0 |
|
|
- Mean = 41.4973
- Std.dev = 20.7752
- 3 items have value -3 (Preferred not to answer)
- 4161 items have value -1 (Date uncertain or unknown)
|
Instance 3 : First repeat imaging visit (2019+)
12,612 participants, 32,609 items
| Maximum | 86.5 |
| Decile 9 | 70.2 |
| Decile 8 | 63.9 |
| Decile 7 | 58.3 |
| Decile 6 | 52.6 |
| Median | 45.9 |
| Decile 4 | 39 |
| Decile 3 | 31.5 |
| Decile 2 | 22.4 |
| Decile 1 | 9.5 |
| Minimum | 0 |
|
|
- Mean = 43.4696
- Std.dev = 21.4658
- 3055 items have value -1 (Date uncertain or unknown)
|
Notes
This is the age participant indicated they were when the corresponding operation took place.
Coding 13 defines 2 special values:
- -1 represents "Date uncertain or unknown"
- -3 represents "Preferred not to answer"
