Data
252,215 items of data are available, covering 220,773 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 | 55 |
| Decile 9 | 28 |
| Decile 8 | 25 |
| Decile 7 | 23 |
| Decile 6 | 21 |
| Median | 21 |
| Decile 4 | 20 |
| Decile 3 | 19 |
| Decile 2 | 18 |
| Decile 1 | 17 |
| Minimum | 5 |
|
|
- There are 51 distinct values.
- Mean = 21.4785
- Std.dev = 4.63659
- 1486 items above graph maximum of 39
- 414 items have value -3 (Prefer not to answer)
- 8786 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
220,409 participants, 220,409 items
| Maximum | 55 |
| Decile 9 | 28 |
| Decile 8 | 25 |
| Decile 7 | 23 |
| Decile 6 | 22 |
| Median | 21 |
| Decile 4 | 20 |
| Decile 3 | 19 |
| Decile 2 | 18 |
| Decile 1 | 17 |
| Minimum | 5 |
|
|
- There are 51 distinct values.
- Mean = 21.5358
- Std.dev = 4.67207
- 1320 items above graph maximum of 39
- 390 items have value -3 (Prefer not to answer)
- 7792 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
8,461 participants, 8,461 items
| Maximum | 55 |
| Decile 9 | 27 |
| Decile 8 | 25 |
| Decile 7 | 23 |
| Decile 6 | 22 |
| Median | 21 |
| Decile 4 | 20 |
| Decile 3 | 19 |
| Decile 2 | 18 |
| Decile 1 | 17 |
| Minimum | 6 |
|
|
- There are 41 distinct values.
- Mean = 21.6561
- Std.dev = 4.49952
- 68 items above graph maximum of 37
- 8 items have value -3 (Prefer not to answer)
- 265 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
21,349 participants, 21,349 items
| Maximum | 55 |
| Decile 9 | 26 |
| Decile 8 | 24 |
| Decile 7 | 22 |
| Decile 6 | 21 |
| Median | 20 |
| Decile 4 | 19 |
| Decile 3 | 18 |
| Decile 2 | 18 |
| Decile 1 | 17 |
| Minimum | 5 |
|
|
- There are 46 distinct values.
- Mean = 20.9182
- Std.dev = 4.30215
- 193 items above graph maximum of 35
- 16 items have value -3 (Prefer not to answer)
- 664 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
1,996 participants, 1,996 items
| Maximum | 50 |
| Decile 9 | 25 |
| Decile 8 | 23 |
| Decile 7 | 21 |
| Decile 6 | 20 |
| Median | 20 |
| Decile 4 | 19 |
| Decile 3 | 18 |
| Decile 2 | 17 |
| Decile 1 | 16 |
| Minimum | 10 |
|
|
- There are 34 distinct values.
- Mean = 20.435
- Std.dev = 4.19073
- 29 items above graph maximum of 34
- 65 items have value -1 (Do not know)
|
Notes
ACE touchscreen question "About how old were you when you first went on the contraceptive pill?"
The following checks were performed:
- If answer < 5 then rejected
- If answer > Participants age then rejected
- If answer < 10 then participant asked to confirm
- If answer > 50 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.
|
Field 2794 was collected from women who indicated that they had taken the contraceptive pill, as defined by their answers to Field 2784
Coding 100291 defines 2 special values:
- -1 represents "Do not know"
- -3 represents "Prefer not to answer"
