Data
170,646 items of data are available, covering 152,789 participants.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Units of measurement are Units.
| Maximum | 7 |
| Decile 9 | 1 |
| Decile 8 | 0.829545 |
| Decile 7 | 0.684783 |
| Decile 6 | 0.544118 |
| Median | 0.44717 |
| Decile 4 | 0.35 |
| Decile 3 | 0.263158 |
| Decile 2 | 0.188235 |
| Decile 1 | 0.109756 |
| Minimum | 0 |
|
|
- Mean = 0.533363
- Std.dev = 0.411935
- 1926 items above graph maximum of 1.89024
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
150,916 participants, 150,916 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 | 0.1989 |
| Decile 1 | 0.116667 |
| Minimum | 0 |
|
|
- Mean = 0.550717
- Std.dev = 0.418702
- 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+)
13,205 participants, 13,205 items
| Maximum | 3.5 |
| Decile 9 | 0.791667 |
| Decile 8 | 0.611111 |
| Decile 7 | 0.483871 |
| Decile 6 | 0.386842 |
| Median | 0.303988 |
| Decile 4 | 0.238889 |
| Decile 3 | 0.180556 |
| Decile 2 | 0.125 |
| Decile 1 | 0.0745403 |
| Minimum | 0 |
|
|
- Mean = 0.385612
- Std.dev = 0.313666
- 94 items above graph maximum of 1.50879
|
Instance 3 : First repeat imaging visit (2019+)
1,184 participants, 1,184 items
| Maximum | 3.5 |
| Decile 9 | 0.742534 |
| Decile 8 | 0.578947 |
| Decile 7 | 0.478646 |
| Decile 6 | 0.390661 |
| Median | 0.31 |
| Decile 4 | 0.243826 |
| Decile 3 | 0.180653 |
| Decile 2 | 0.129099 |
| Decile 1 | 0.0768849 |
| Minimum | 0 |
|
|
- Mean = 0.377338
- Std.dev = 0.309808
- 12 items above graph maximum of 1.40818
|
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.
