Data
219,948 items of data are available, covering 185,003 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 | 32 |
| Decile 8 | 29 |
| Decile 7 | 28 |
| Decile 6 | 26 |
| Median | 25 |
| Decile 4 | 24 |
| Decile 3 | 23 |
| Decile 2 | 21 |
| Decile 1 | 20 |
| Minimum | 10 |
|
|
- There are 41 distinct values.
- Mean = 25.4778
- Std.dev = 4.63327
- 36 items above graph maximum of 44
- 275 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
184,931 participants, 184,931 items
| Maximum | 52 |
| Decile 9 | 31 |
| Decile 8 | 29 |
| Decile 7 | 28 |
| Decile 6 | 26 |
| Median | 25 |
| Decile 4 | 24 |
| Decile 3 | 23 |
| Decile 2 | 21 |
| Decile 1 | 19 |
| Minimum | 10 |
|
|
- There are 41 distinct values.
- Mean = 25.3075
- Std.dev = 4.6245
- 36 items above graph maximum of 43
- 253 items have value -4 (Do not remember)
- 138 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 | 32 |
| Decile 8 | 29 |
| Decile 7 | 28 |
| Decile 6 | 27 |
| Median | 26 |
| Decile 4 | 25 |
| Decile 3 | 24 |
| Decile 2 | 22 |
| Decile 1 | 20 |
| Minimum | 15 |
|
|
- There are 29 distinct values.
- Mean = 25.9744
- Std.dev = 4.38452
- 1 item above graph maximum of 44
- 5 items have value -4 (Do not remember)
- 2 items have value -3 (Prefer not to answer)
|
Instance 2 : Imaging visit (2014+)
25,755 participants, 25,755 items
| Maximum | 51 |
| Decile 9 | 32 |
| Decile 8 | 30 |
| Decile 7 | 29 |
| Decile 6 | 27 |
| Median | 26 |
| Decile 4 | 25 |
| Decile 3 | 24 |
| Decile 2 | 23 |
| Decile 1 | 21 |
| Minimum | 14 |
|
|
- There are 34 distinct values.
- Mean = 26.4544
- Std.dev = 4.61584
- 8 items above graph maximum of 43
- 16 items have value -4 (Do not remember)
- 8 items have value -3 (Prefer not to answer)
|
Instance 3 : First repeat imaging visit (2019+)
2,306 participants, 2,306 items
| Maximum | 45 |
| Decile 9 | 33 |
| Decile 8 | 30 |
| Decile 7 | 29 |
| Decile 6 | 28 |
| Median | 27 |
| Decile 4 | 26 |
| Decile 3 | 24 |
| Decile 2 | 23 |
| Decile 1 | 21 |
| Minimum | 15 |
|
|
- There are 28 distinct values.
- Mean = 26.7076
- Std.dev = 4.61681
- 1 items have value -4 (Do not remember)
|
Notes
ACE touchscreen question "How old were you when you had your FIRST 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 2754 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"
