Data
66,472 items of data are available, covering 64,156 participants.
Some values have special meanings defined by Data-Coding
100582.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Units of measurement are days.
| Maximum | 365 |
| Decile 9 | 30 |
| Decile 8 | 28 |
| Decile 7 | 28 |
| Decile 6 | 28 |
| Median | 28 |
| Decile 4 | 28 |
| Decile 3 | 26 |
| Decile 2 | 24 |
| Decile 1 | 21 |
| Minimum | 7 |
|
|
- There are 76 distinct values.
- Mean = 26.8184
- Std.dev = 7.33881
- 354 items below graph minimum of 12
- 465 items above graph maximum of 39
- 11562 items have value -6 (Irregular cycle)
- 792 items have value -3 (Prefer not to answer)
- 4231 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
64,044 participants, 64,044 items
| Maximum | 365 |
| Decile 9 | 30 |
| Decile 8 | 28 |
| Decile 7 | 28 |
| Decile 6 | 28 |
| Median | 28 |
| Decile 4 | 28 |
| Decile 3 | 26 |
| Decile 2 | 24 |
| Decile 1 | 21 |
| Minimum | 7 |
|
|
- There are 76 distinct values.
- Mean = 26.7847
- Std.dev = 7.14925
- 347 items below graph minimum of 12
- 433 items above graph maximum of 39
- 10880 items have value -6 (Irregular cycle)
- 755 items have value -3 (Prefer not to answer)
- 4064 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
1,046 participants, 1,046 items
| Maximum | 120 |
| Decile 9 | 30 |
| Decile 8 | 28 |
| Decile 7 | 28 |
| Decile 6 | 28 |
| Median | 28 |
| Decile 4 | 28 |
| Decile 3 | 26 |
| Decile 2 | 24 |
| Decile 1 | 21 |
| Minimum | 7 |
|
|
- There are 29 distinct values.
- Mean = 27.1035
- Std.dev = 6.67029
- 3 items below graph minimum of 12
- 7 items above graph maximum of 39
- 263 items have value -6 (Irregular cycle)
- 14 items have value -3 (Prefer not to answer)
- 64 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
1,325 participants, 1,325 items
| Maximum | 300 |
| Decile 9 | 30 |
| Decile 8 | 29 |
| Decile 7 | 28 |
| Decile 6 | 28 |
| Median | 28 |
| Decile 4 | 28 |
| Decile 3 | 26 |
| Decile 2 | 25 |
| Decile 1 | 21 |
| Minimum | 7 |
|
|
- There are 36 distinct values.
- Mean = 28.5155
- Std.dev = 14.9149
- 4 items below graph minimum of 12
- 23 items above graph maximum of 39
- 396 items have value -6 (Irregular cycle)
- 22 items have value -3 (Prefer not to answer)
- 100 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
57 participants, 57 items
| Maximum | 60 |
| Decile 9 | 30 |
| Decile 8 | 29 |
| Decile 7 | 28 |
| Decile 6 | 28 |
| Median | 28 |
| Decile 4 | 28 |
| Decile 3 | 26 |
| Decile 2 | 26 |
| Decile 1 | 20 |
| Minimum | 18 |
|
|
- There are 8 distinct values.
- Mean = 28.8
- Std.dev = 8.90094
- 2 items above graph maximum of 40
- 23 items have value -6 (Irregular cycle)
- 1 items have value -3 (Prefer not to answer)
- 3 items have value -1 (Do not know)
|
Notes
ACE touchscreen question "How many days is your usual menstrual cycle? (The number of days between each menstrual period)"
The following checks were performed:
- If answer < 7 then rejected
- If answer > 365 then rejected
- If answer < 12 then participant asked to confirm
- If answer > 60 then participant asked to confirm
Field 3710 was collected from women who indicated that their periods had not stopped (menopause), as defined by their answers to Field 2724
Coding 100582 defines 3 special values:
- -6 represents "Irregular cycle"
- -1 represents "Do not know"
- -3 represents "Prefer not to answer"
