Data
180,134 items of data are available, covering 153,624 participants.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Units of measurement are Units.
| Maximum | 7 |
| Decile 9 | 1 |
| Decile 8 | 0.811321 |
| Decile 7 | 0.670732 |
| Decile 6 | 0.529412 |
| Median | 0.435897 |
| Decile 4 | 0.341463 |
| Decile 3 | 0.254902 |
| Decile 2 | 0.182609 |
| Decile 1 | 0.105769 |
| Minimum | 0 |
|
|
- Mean = 0.523261
- Std.dev = 0.40827
- 1925 items above graph maximum of 1.89423
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
150,834 participants, 150,834 items
| Maximum | 7 |
| Decile 9 | 1 |
| Decile 8 | 0.857143 |
| Decile 7 | 0.706897 |
| 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 = 0.550763
- Std.dev = 0.418731
- 1883 items above graph maximum of 1.88333
|
Instance 1 : First repeat assessment visit (2012-13)
5,339 participants, 5,339 items
| Maximum | 3 |
| Decile 9 | 0.910485 |
| Decile 8 | 0.702254 |
| Decile 7 | 0.551724 |
| Decile 6 | 0.449027 |
| Median | 0.354167 |
| Decile 4 | 0.277429 |
| Decile 3 | 0.208248 |
| Decile 2 | 0.144868 |
| Decile 1 | 0.0887841 |
| Minimum | 0 |
|
|
- Mean = 0.442976
- Std.dev = 0.356995
- 46 items above graph maximum of 1.73219
|
Instance 2 : Imaging visit (2014+)
21,168 participants, 21,168 items
| Maximum | 3.5 |
| Decile 9 | 0.754545 |
| Decile 8 | 0.589087 |
| Decile 7 | 0.465517 |
| Decile 6 | 0.369442 |
| Median | 0.291667 |
| Decile 4 | 0.230079 |
| Decile 3 | 0.173077 |
| Decile 2 | 0.120876 |
| Decile 1 | 0.0714286 |
| Minimum | 0 |
|
|
- Mean = 0.370619
- Std.dev = 0.302638
- 176 items above graph maximum of 1.43766
|
Instance 3 : First repeat imaging visit (2019+)
2,793 participants, 2,793 items
| Maximum | 3.5 |
| Decile 9 | 0.715352 |
| Decile 8 | 0.546979 |
| Decile 7 | 0.436319 |
| Decile 6 | 0.347644 |
| Median | 0.276786 |
| Decile 4 | 0.214286 |
| Decile 3 | 0.162221 |
| Decile 2 | 0.113459 |
| Decile 1 | 0.070061 |
| Minimum | 0 |
|
|
- Mean = 0.348357
- Std.dev = 0.288597
- 27 items above graph maximum of 1.36064
|
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.
