Data
310,670 items of data are available, covering 272,890 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 | 25 |
| Decile 9 | 15 |
| Decile 8 | 14 |
| Decile 7 | 14 |
| Decile 6 | 13 |
| Median | 13 |
| Decile 4 | 13 |
| Decile 3 | 12 |
| Decile 2 | 12 |
| Decile 1 | 11 |
| Minimum | 5 |
|
|
- There are 21 distinct values.
- Mean = 12.9723
- Std.dev = 1.6194
- 38 items below graph minimum of 7
- 183 items above graph maximum of 19
- 599 items have value -3 (Prefer not to answer)
- 8882 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
272,878 participants, 272,878 items
| Maximum | 25 |
| Decile 9 | 15 |
| Decile 8 | 14 |
| Decile 7 | 14 |
| Decile 6 | 13 |
| Median | 13 |
| Decile 4 | 13 |
| Decile 3 | 12 |
| Decile 2 | 11 |
| Decile 1 | 11 |
| Minimum | 5 |
|
|
- There are 21 distinct values.
- Mean = 12.9699
- Std.dev = 1.62321
- 37 items below graph minimum of 7
- 153 items above graph maximum of 19
- 537 items have value -3 (Prefer not to answer)
- 7841 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
10,402 participants, 10,402 items
| Maximum | 25 |
| Decile 9 | 15 |
| Decile 8 | 14 |
| Decile 7 | 14 |
| Decile 6 | 13 |
| Median | 13 |
| Decile 4 | 13 |
| Decile 3 | 12 |
| Decile 2 | 12 |
| Decile 1 | 11 |
| Minimum | 8 |
|
|
- There are 15 distinct values.
- Mean = 12.9681
- Std.dev = 1.60048
- 7 items above graph maximum of 19
- 16 items have value -3 (Prefer not to answer)
- 282 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
25,091 participants, 25,091 items
| Maximum | 25 |
| Decile 9 | 15 |
| Decile 8 | 14 |
| Decile 7 | 14 |
| Decile 6 | 13 |
| Median | 13 |
| Decile 4 | 13 |
| Decile 3 | 12 |
| Decile 2 | 12 |
| Decile 1 | 11 |
| Minimum | 5 |
|
|
- There are 19 distinct values.
- Mean = 12.9954
- Std.dev = 1.58832
- 1 item below graph minimum of 7
- 20 items above graph maximum of 19
- 45 items have value -3 (Prefer not to answer)
- 709 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
2,299 participants, 2,299 items
| Maximum | 21 |
| Decile 9 | 15 |
| Decile 8 | 14 |
| Decile 7 | 14 |
| Decile 6 | 13 |
| Median | 13 |
| Decile 4 | 13 |
| Decile 3 | 12 |
| Decile 2 | 12 |
| Decile 1 | 11 |
| Minimum | 8 |
|
|
- There are 14 distinct values.
- Mean = 13.0258
- Std.dev = 1.58458
- 3 items above graph maximum of 19
- 1 items have value -3 (Prefer not to answer)
- 50 items have value -1 (Do not know)
|
Notes
ACE touchscreen question "How old were you when your periods started?"
The following checks were performed:
- If answer < 5 then rejected
- If answer > Participants age then rejected
- If answer > 25 then rejected
- If answer < 6 then participant asked to confirm
- If answer > 20 then participant asked to confirm
If the participant activated the Help button they were shown the message:
If you are unsure, please provide an estimate or select Do not know.
|
Coding 100291 defines 2 special values:
- -1 represents "Do not know"
- -3 represents "Prefer not to answer"
