Data
43,762 items of data are available, covering 36,523 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 | 53 |
| 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 40 distinct values.
- Mean = 29.1814
- Std.dev = 6.35443
- 39 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
36,438 participants, 36,438 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 = 29.0278
- Std.dev = 6.33513
- 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+)
5,397 participants, 5,397 items
| Maximum | 53 |
| Decile 9 | 39 |
| Decile 8 | 36 |
| Decile 7 | 34 |
| Decile 6 | 32 |
| Median | 30 |
| Decile 4 | 28 |
| Decile 3 | 27 |
| Decile 2 | 24 |
| Decile 1 | 21 |
| Minimum | 14 |
|
|
- There are 38 distinct values.
- Mean = 30.0879
- Std.dev = 6.42191
- 3 items have value -4 (Do not remember)
- 1 items have value -3 (Prefer not to answer)
|
Instance 3 : First repeat imaging visit (2019+)
621 participants, 621 items
| Maximum | 47 |
| Decile 9 | 39 |
| Decile 8 | 36 |
| Decile 7 | 33 |
| Decile 6 | 32 |
| Median | 30 |
| Decile 4 | 28.5 |
| Decile 3 | 27 |
| Decile 2 | 24.5 |
| Decile 1 | 22 |
| Minimum | 15 |
|
|
- There are 32 distinct values.
- Mean = 30.0789
- Std.dev = 6.1452
|
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"
