Data
138,294 items of data are available, covering 123,477 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 years.
| Maximum | 65 |
| Decile 9 | 21 |
| Decile 8 | 19 |
| Decile 7 | 18 |
| Decile 6 | 18 |
| Median | 17 |
| Decile 4 | 16 |
| Decile 3 | 16 |
| Decile 2 | 15 |
| Decile 1 | 14 |
| Minimum | 5 |
|
|
- There are 59 distinct values.
- Mean = 17.3005
- Std.dev = 3.68773
- 57 items below graph minimum of 7
- 2328 items above graph maximum of 28
- 47 items have value -3 (Prefer not to answer)
- 687 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
120,967 participants, 120,967 items
| Maximum | 64 |
| Decile 9 | 21 |
| Decile 8 | 19 |
| Decile 7 | 18 |
| Decile 6 | 18 |
| Median | 17 |
| Decile 4 | 16 |
| Decile 3 | 16 |
| Decile 2 | 15 |
| Decile 1 | 14 |
| Minimum | 5 |
|
|
- There are 58 distinct values.
- Mean = 17.2824
- Std.dev = 3.70228
- 54 items below graph minimum of 7
- 2064 items above graph maximum of 28
- 43 items have value -3 (Prefer not to answer)
- 607 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
5,067 participants, 5,067 items
| Maximum | 51 |
| Decile 9 | 21 |
| Decile 8 | 19 |
| Decile 7 | 18 |
| Decile 6 | 18 |
| Median | 17 |
| Decile 4 | 16 |
| Decile 3 | 16 |
| Decile 2 | 15 |
| Decile 1 | 14 |
| Minimum | 7 |
|
|
- There are 40 distinct values.
- Mean = 17.3571
- Std.dev = 3.56823
- 79 items above graph maximum of 28
- 26 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
11,286 participants, 11,286 items
| Maximum | 65 |
| Decile 9 | 21 |
| Decile 8 | 19 |
| Decile 7 | 18 |
| Decile 6 | 18 |
| Median | 17 |
| Decile 4 | 16 |
| Decile 3 | 16 |
| Decile 2 | 15 |
| Decile 1 | 14 |
| Minimum | 5 |
|
|
- There are 47 distinct values.
- Mean = 17.4648
- Std.dev = 3.59825
- 3 items below graph minimum of 7
- 175 items above graph maximum of 28
- 4 items have value -3 (Prefer not to answer)
- 46 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
974 participants, 974 items
| Maximum | 50 |
| Decile 9 | 21 |
| Decile 8 | 19 |
| Decile 7 | 18 |
| Decile 6 | 18 |
| Median | 17 |
| Decile 4 | 16 |
| Decile 3 | 16 |
| Decile 2 | 15 |
| Decile 1 | 14 |
| Minimum | 8 |
|
|
- There are 26 distinct values.
- Mean = 17.3468
- Std.dev = 3.45645
- 10 items above graph maximum of 28
- 8 items have value -1 (Do not know)
|
Notes
ACE touchscreen question "How old were you when you first started smoking on most days?"
The following checks were performed:
- If answer < 5 then rejected
- If answer > Participants age then rejected
- If answer < 12 then participant asked to confirm
Field 2867 was collected from participants who indicated that in the past they smoked on most or all days, as defined by their answers to Field 1249
Coding 100291 defines 2 special values:
- -1 represents "Do not know"
- -3 represents "Prefer not to answer"
