Data
41,693 items of data are available, covering 36,519 participants.
Some values have special meanings defined by Data-Coding
100586.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Units of measurement are years.
| Maximum | 52 |
| Decile 9 | 38 |
| Decile 8 | 35 |
| Decile 7 | 33 |
| Decile 6 | 31 |
| Median | 29 |
| Decile 4 | 27 |
| Decile 3 | 25 |
| Decile 2 | 23 |
| Decile 1 | 21 |
| Minimum | 13 |
|
|
- There are 39 distinct values.
- Mean = 29.1221
- Std.dev = 6.33982
- 37 items have value -4 (Do not remember)
- 26 items have value -3 (Prefer not to answer)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
36,460 participants, 36,460 items
| Maximum | 52 |
| Decile 9 | 38 |
| Decile 8 | 35 |
| Decile 7 | 32 |
| Decile 6 | 30 |
| Median | 29 |
| Decile 4 | 27 |
| Decile 3 | 25 |
| Decile 2 | 23 |
| Decile 1 | 21 |
| Minimum | 13 |
|
|
- There are 39 distinct values.
- Mean = 29.029
- Std.dev = 6.33557
- 36 items have value -4 (Do not remember)
- 25 items have value -3 (Prefer not to answer)
|
Instance 1 : First repeat assessment visit (2012-13)
1,306 participants, 1,306 items
| Maximum | 46 |
| Decile 9 | 38 |
| Decile 8 | 35 |
| Decile 7 | 33 |
| Decile 6 | 31 |
| Median | 29 |
| Decile 4 | 27 |
| Decile 3 | 25.5 |
| Decile 2 | 23 |
| Decile 1 | 21 |
| Minimum | 16 |
|
|
- There are 31 distinct values.
- Mean = 29.2902
- Std.dev = 6.35903
|
Instance 2 : Imaging visit (2014+)
3,550 participants, 3,550 items
| Maximum | 49 |
| Decile 9 | 39 |
| Decile 8 | 36 |
| Decile 7 | 33 |
| Decile 6 | 32 |
| Median | 30 |
| Decile 4 | 28 |
| Decile 3 | 26 |
| Decile 2 | 24 |
| Decile 1 | 21 |
| Minimum | 15 |
|
|
- There are 35 distinct values.
- Mean = 29.9123
- Std.dev = 6.31965
- 1 items have value -4 (Do not remember)
- 1 items have value -3 (Prefer not to answer)
|
Instance 3 : First repeat imaging visit (2019+)
377 participants, 377 items
| Maximum | 47 |
| Decile 9 | 39 |
| Decile 8 | 36 |
| Decile 7 | 33 |
| Decile 6 | 31.5 |
| Median | 30 |
| Decile 4 | 29 |
| Decile 3 | 27 |
| Decile 2 | 24 |
| Decile 1 | 22 |
| Minimum | 15 |
|
|
- There are 31 distinct values.
- Mean = 30.0849
- Std.dev = 6.26245
|
Notes
ACE touchscreen question "How old were you when you had your child?"
The following checks were performed:
- If answer < 8 then rejected
- If answer > Participants age then rejected
- If answer > 65 then rejected
- If answer < Age at first period then rejected
- If answer < 12 then participant asked to confirm
- If answer > 48 then participant asked to confirm
- If answer > Age when periods stopped then participant asked to confirm
Field 3872 was collected from women who indicated they had given birth to only one child, as defined by their answers to Field 2734
Coding 100586 defines 2 special values:
- -4 represents "Do not remember"
- -3 represents "Prefer not to answer"
