Data
142,105 items of data are available, covering 124,134 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 = 17.2991
- Std.dev = 3.68412
- 61 items below graph minimum of 7
- 2390 items above graph maximum of 28
- 47 items have value -3 (Prefer not to answer)
- 704 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
120,946 participants, 120,946 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 = 17.2822
- Std.dev = 3.70191
- 54 items below graph minimum of 7
- 2063 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+)
14,901 participants, 14,901 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 48 distinct values.
- Mean = 17.4112
- Std.dev = 3.60169
- 7 items below graph minimum of 7
- 237 items above graph maximum of 28
- 4 items have value -3 (Prefer not to answer)
- 62 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
1,191 participants, 1,191 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 = 17.3629
- Std.dev = 3.33434
- 11 items above graph maximum of 28
- 9 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"
