Data
168,734 items of data are available, covering 152,637 participants.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Units of measurement are Units.
| Maximum | 7 |
| Decile 9 | 1 |
| Decile 8 | 0.833333 |
| Decile 7 | 0.6875 |
| Decile 6 | 0.546875 |
| Median | 0.45 |
| Decile 4 | 0.3525 |
| Decile 3 | 0.264706 |
| Decile 2 | 0.189655 |
| Decile 1 | 0.110577 |
| Minimum | 0 |
|
|
- Mean = 0.535344
- Std.dev = 0.412702
- 1927 items above graph maximum of 1.88942
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
150,938 participants, 150,938 items
| Maximum | 7 |
| Decile 9 | 1 |
| Decile 8 | 0.857143 |
| Decile 7 | 0.706814 |
| Decile 6 | 0.570312 |
| Median | 0.465909 |
| Decile 4 | 0.36875 |
| Decile 3 | 0.277778 |
| Decile 2 | 0.19898 |
| Decile 1 | 0.116667 |
| Minimum | 0 |
|
|
- Mean = 0.550768
- Std.dev = 0.418732
- 1885 items above graph maximum of 1.88333
|
Instance 1 : First repeat assessment visit (2012-13)
5,341 participants, 5,341 items
| Maximum | 3 |
| Decile 9 | 0.909674 |
| Decile 8 | 0.702128 |
| Decile 7 | 0.551724 |
| Decile 6 | 0.44898 |
| Median | 0.354167 |
| Decile 4 | 0.277266 |
| Decile 3 | 0.208082 |
| Decile 2 | 0.144868 |
| Decile 1 | 0.0888889 |
| Minimum | 0 |
|
|
- Mean = 0.442868
- Std.dev = 0.356972
- 48 items above graph maximum of 1.73046
|
Instance 2 : Imaging visit (2014+)
11,605 participants, 11,605 items
| Maximum | 3.5 |
| Decile 9 | 0.797975 |
| Decile 8 | 0.616667 |
| Decile 7 | 0.488636 |
| Decile 6 | 0.388636 |
| Median | 0.306186 |
| Decile 4 | 0.240741 |
| Decile 3 | 0.181818 |
| Decile 2 | 0.125893 |
| Decile 1 | 0.0754717 |
| Minimum | 0 |
|
|
- Mean = 0.388528
- Std.dev = 0.316653
- 89 items above graph maximum of 1.52048
|
Instance 3 : First repeat imaging visit (2019+)
850 participants, 850 items
| Maximum | 2.34783 |
| Decile 9 | 0.75 |
| Decile 8 | 0.578804 |
| Decile 7 | 0.483871 |
| Decile 6 | 0.393443 |
| Median | 0.3125 |
| Decile 4 | 0.245833 |
| Decile 3 | 0.188679 |
| Decile 2 | 0.138889 |
| Decile 1 | 0.0797872 |
| Minimum | 0 |
|
|
- Mean = 0.382034
- Std.dev = 0.303771
- 9 items above graph maximum of 1.42021
|
Notes
Average number of pack-years smoked by an individual each year, over their adult lifetime, calculated using pack-years data field. Pack years as a proportion of lifespan exposed to smoking is defined as pack years divided by the number of years between the participants' age at recruitment and the age of 16:
Pack years / (Age at recruitment - 16)
This derived data field has come from Professor Martin Tobin at the University of Leicester.
