Data
614,430 items of data are available, covering 501,310 participants.
Some values have special meanings defined by Data-Coding
100291.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Units of measurement are hours/day.
| Maximum | 23 |
| Decile 9 | 8 |
| Decile 8 | 8 |
| Decile 7 | 8 |
| Decile 6 | 7 |
| Median | 7 |
| Decile 4 | 7 |
| Decile 3 | 7 |
| Decile 2 | 6 |
| Decile 1 | 6 |
| Minimum | 1 |
|
|
- There are 23 distinct values.
- Mean = 7.15715
- Std.dev = 1.10292
- 1195 items below graph minimum of 4
- 2424 items above graph maximum of 10
- 410 items have value -3 (Prefer not to answer)
- 3286 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
501,278 participants, 501,278 items
| Maximum | 23 |
| Decile 9 | 8 |
| Decile 8 | 8 |
| Decile 7 | 8 |
| Decile 6 | 7 |
| Median | 7 |
| Decile 4 | 7 |
| Decile 3 | 7 |
| Decile 2 | 6 |
| Decile 1 | 6 |
| Minimum | 1 |
|
|
- There are 23 distinct values.
- Mean = 7.15428
- Std.dev = 1.11141
- 1056 items below graph minimum of 4
- 2146 items above graph maximum of 10
- 384 items have value -3 (Prefer not to answer)
- 2940 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
20,328 participants, 20,328 items
| Maximum | 16 |
| Decile 9 | 8 |
| Decile 8 | 8 |
| Decile 7 | 8 |
| Decile 6 | 7 |
| Median | 7 |
| Decile 4 | 7 |
| Decile 3 | 7 |
| Decile 2 | 6 |
| Decile 1 | 6 |
| Minimum | 1 |
|
|
- There are 16 distinct values.
- Mean = 7.23494
- Std.dev = 1.05835
- 26 items below graph minimum of 4
- 62 items above graph maximum of 10
- 4 items have value -3 (Prefer not to answer)
- 55 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
84,020 participants, 84,020 items
| Maximum | 16 |
| Decile 9 | 8 |
| Decile 8 | 8 |
| Decile 7 | 8 |
| Decile 6 | 7 |
| Median | 7 |
| Decile 4 | 7 |
| Decile 3 | 7 |
| Decile 2 | 6 |
| Decile 1 | 6 |
| Minimum | 1 |
|
|
- There are 16 distinct values.
- Mean = 7.15289
- Std.dev = 1.06624
- 104 items below graph minimum of 4
- 192 items above graph maximum of 10
- 21 items have value -3 (Prefer not to answer)
- 268 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
8,804 participants, 8,804 items
| Maximum | 15 |
| Decile 9 | 8 |
| Decile 8 | 8 |
| Decile 7 | 8 |
| Decile 6 | 7 |
| Median | 7 |
| Decile 4 | 7 |
| Decile 3 | 7 |
| Decile 2 | 6 |
| Decile 1 | 6 |
| Minimum | 2 |
|
|
- There are 14 distinct values.
- Mean = 7.18109
- Std.dev = 1.05606
- 9 items below graph minimum of 4
- 24 items above graph maximum of 10
- 1 items have value -3 (Prefer not to answer)
- 23 items have value -1 (Do not know)
|
Notes
ACE touchscreen question "About how many hours sleep do you get in every 24 hours? (please include naps)"
The following checks were performed:
- If answer < 1 then rejected
- If answer > 23 then rejected
- If answer < 3 then participant asked to confirm
- If answer > 12 then participant asked to confirm
If the participant activated the Help button they were shown the message:
If the time you spend sleeping varies a lot, give the
average time for a 24 hour day in the last 4 weeks.
|
Coding 100291 defines 2 special values:
- -1 represents "Do not know"
- -3 represents "Prefer not to answer"
0 Related Data-Fields
There are no related data-fields
