Data
217,643 items of data are available, covering 185,000 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 | 62 |
| Decile 9 | 37 |
| Decile 8 | 35 |
| Decile 7 | 33 |
| Decile 6 | 31 |
| Median | 30 |
| Decile 4 | 29 |
| Decile 3 | 28 |
| Decile 2 | 26 |
| Decile 1 | 24 |
| Minimum | 15 |
|
|
- There are 40 distinct values.
- Mean = 30.3672
- Std.dev = 4.88882
- 6 items above graph maximum of 50
- 687 items have value -4 (Do not remember)
- 148 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
184,933 participants, 184,933 items
| Maximum | 52 |
| Decile 9 | 37 |
| Decile 8 | 35 |
| Decile 7 | 33 |
| Decile 6 | 31 |
| Median | 30 |
| Decile 4 | 29 |
| Decile 3 | 27 |
| Decile 2 | 26 |
| Decile 1 | 24 |
| Minimum | 15 |
|
|
- There are 38 distinct values.
- Mean = 30.2676
- Std.dev = 4.89735
- 2 items above graph maximum of 50
- 629 items have value -4 (Do not remember)
- 139 items have value -3 (Prefer not to answer)
|
Instance 1 : First repeat assessment visit (2012-13)
6,956 participants, 6,956 items
| Maximum | 51 |
| Decile 9 | 37 |
| Decile 8 | 35 |
| Decile 7 | 33 |
| Decile 6 | 31 |
| Median | 30 |
| Decile 4 | 29 |
| Decile 3 | 28 |
| Decile 2 | 27 |
| Decile 1 | 25 |
| Minimum | 18 |
|
|
- There are 32 distinct values.
- Mean = 30.5502
- Std.dev = 4.73491
- 2 items above graph maximum of 49
- 8 items have value -4 (Do not remember)
- 1 items have value -3 (Prefer not to answer)
|
Instance 2 : Imaging visit (2014+)
23,778 participants, 23,778 items
| Maximum | 62 |
| Decile 9 | 37 |
| Decile 8 | 35 |
| Decile 7 | 33 |
| Decile 6 | 32 |
| Median | 31 |
| Decile 4 | 30 |
| Decile 3 | 28 |
| Decile 2 | 27 |
| Decile 1 | 25 |
| Minimum | 17 |
|
|
- There are 37 distinct values.
- Mean = 31.0168
- Std.dev = 4.81662
- 5 items above graph maximum of 49
- 47 items have value -4 (Do not remember)
- 8 items have value -3 (Prefer not to answer)
|
Instance 3 : First repeat imaging visit (2019+)
1,976 participants, 1,976 items
| Maximum | 45 |
| Decile 9 | 38 |
| Decile 8 | 35 |
| Decile 7 | 34 |
| Decile 6 | 32 |
| Median | 31 |
| Decile 4 | 30 |
| Decile 3 | 29 |
| Decile 2 | 27 |
| Decile 1 | 25 |
| Minimum | 16 |
|
|
- There are 29 distinct values.
- Mean = 31.2134
- Std.dev = 4.7877
- 3 items have value -4 (Do not remember)
|
Notes
ACE touchscreen question "How old were you when you had your LAST child?"
The following checks were performed:
- If answer < 8 then rejected
- If answer > 65 then rejected
- If answer > Participants age 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 2764 was collected from women who indicated they had given birth to more than 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"
