Data
149,307 items of data are available, covering 125,234 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 | 82 |
| Decile 9 | 57 |
| Decile 8 | 50 |
| Decile 7 | 46 |
| Decile 6 | 42 |
| Median | 39 |
| Decile 4 | 35 |
| Decile 3 | 32 |
| Decile 2 | 29 |
| Decile 1 | 25 |
| Minimum | 8 |
|
|
- There are 75 distinct values.
- Mean = 39.7033
- Std.dev = 11.7112
- 97 items have value -3 (Prefer not to answer)
- 714 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
120,888 participants, 120,888 items
| Maximum | 70 |
| Decile 9 | 57 |
| Decile 8 | 51 |
| Decile 7 | 46 |
| Decile 6 | 42 |
| Median | 39 |
| Decile 4 | 35 |
| Decile 3 | 32 |
| Decile 2 | 29 |
| Decile 1 | 25 |
| Minimum | 8 |
|
|
- There are 63 distinct values.
- Mean = 39.8612
- Std.dev = 11.61
- 86 items have value -3 (Prefer not to answer)
- 599 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
5,066 participants, 5,066 items
| Maximum | 74 |
| Decile 9 | 57 |
| Decile 8 | 50 |
| Decile 7 | 45 |
| Decile 6 | 40 |
| Median | 38 |
| Decile 4 | 34 |
| Decile 3 | 30 |
| Decile 2 | 28 |
| Decile 1 | 25 |
| Minimum | 9 |
|
|
- There are 62 distinct values.
- Mean = 39.0994
- Std.dev = 11.9185
- 1 items have value -3 (Prefer not to answer)
- 17 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
20,576 participants, 20,576 items
| Maximum | 82 |
| Decile 9 | 57 |
| Decile 8 | 50 |
| Decile 7 | 45 |
| Decile 6 | 40 |
| Median | 37 |
| Decile 4 | 34 |
| Decile 3 | 30 |
| Decile 2 | 28 |
| Decile 1 | 25 |
| Minimum | 14 |
|
|
- There are 69 distinct values.
- Mean = 39.101
- Std.dev = 12.1908
- 8 items have value -3 (Prefer not to answer)
- 94 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
2,777 participants, 2,777 items
| Maximum | 75 |
| Decile 9 | 55 |
| Decile 8 | 50 |
| Decile 7 | 45 |
| Decile 6 | 40 |
| Median | 37 |
| Decile 4 | 33 |
| Decile 3 | 30 |
| Decile 2 | 28 |
| Decile 1 | 24 |
| Minimum | 14 |
|
|
- There are 62 distinct values.
- Mean = 38.4078
- Std.dev = 11.8241
- 2 items have value -3 (Prefer not to answer)
- 4 items have value -1 (Do not know)
|
Notes
ACE touchscreen question "How old were you when you last smoked 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 2897 was collected from participants who indicated that in the past they smoked tobacco 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"
