Data
172,799 items of data are available, covering 153,015 participants.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Units of measurement are Units.
| Maximum | 7 |
| Decile 9 | 1 |
| Decile 8 | 0.826087 |
| Decile 7 | 0.681818 |
| Decile 6 | 0.540757 |
| Median | 0.444444 |
| Decile 4 | 0.35 |
| Decile 3 | 0.26087 |
| Decile 2 | 0.1875 |
| Decile 1 | 0.10876 |
| Minimum | 0 |
|
|
- Mean = 0.531225
- Std.dev = 0.411099
- 1932 items above graph maximum of 1.89124
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
150,907 participants, 150,907 items
| Maximum | 7 |
| Decile 9 | 1 |
| Decile 8 | 0.857143 |
| Decile 7 | 0.706731 |
| Decile 6 | 0.57 |
| Median | 0.465909 |
| Decile 4 | 0.36875 |
| Decile 3 | 0.277778 |
| Decile 2 | 0.198864 |
| Decile 1 | 0.116667 |
| Minimum | 0 |
|
|
- Mean = 0.550722
- Std.dev = 0.41871
- 1884 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+)
15,349 participants, 15,349 items
| Maximum | 3.5 |
| Decile 9 | 0.778143 |
| Decile 8 | 0.605263 |
| Decile 7 | 0.480769 |
| Decile 6 | 0.382979 |
| Median | 0.301677 |
| Decile 4 | 0.237288 |
| Decile 3 | 0.18 |
| Decile 2 | 0.125 |
| Decile 1 | 0.0740741 |
| Minimum | 0 |
|
|
- Mean = 0.382397
- Std.dev = 0.310907
- 124 items above graph maximum of 1.48221
|
Instance 3 : First repeat imaging visit (2019+)
1,202 participants, 1,202 items
| Maximum | 3.5 |
| Decile 9 | 0.740739 |
| Decile 8 | 0.577864 |
| Decile 7 | 0.476562 |
| Decile 6 | 0.390661 |
| Median | 0.31 |
| Decile 4 | 0.241422 |
| Decile 3 | 0.180653 |
| Decile 2 | 0.129398 |
| Decile 1 | 0.0762897 |
| Minimum | 0 |
|
|
- Mean = 0.376448
- Std.dev = 0.308749
- 12 items above graph maximum of 1.40519
|
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.
