Variable breakdown
smoking_details_enter
Section and category
Section Timings.Timings
Description
“Start time for Q4.7 to Q4.11 [Extra section for smokers or ex-smokers only]”
Additional information
| Metadata | |
|---|---|
| contents | Date and time |
| is_mandatory | No |
Data summary
Baseline
| Year_Quarter | freq | pct_valid | pct_tot |
|---|---|---|---|
| 2004.2 | 91 | 0.05 | 0.02 |
| 2004.3 | 2463 | 1.48 | 0.48 |
| 2004.4 | 8135 | 4.88 | 1.58 |
| 2005.1 | 8168 | 4.90 | 1.58 |
| 2005.2 | 11612 | 6.97 | 2.25 |
| 2005.3 | 9800 | 5.88 | 1.90 |
| 2005.4 | 12574 | 7.54 | 2.44 |
| 2006.1 | 8926 | 5.36 | 1.73 |
| 2006.2 | 12623 | 7.57 | 2.45 |
| 2006.3 | 12351 | 7.41 | 2.40 |
| 2006.4 | 13634 | 8.18 | 2.65 |
| 2007.1 | 9219 | 5.53 | 1.79 |
| 2007.2 | 12137 | 7.28 | 2.35 |
| 2007.3 | 12053 | 7.23 | 2.34 |
| 2007.4 | 13653 | 8.19 | 2.65 |
| 2008.1 | 8323 | 4.99 | 1.61 |
| 2008.2 | 10358 | 6.21 | 2.01 |
| 2008.3 | 550 | 0.33 | 0.11 |
| 2009.3 | 4 | 0.00 | 0.00 |
| <NA> | 348739 | NA | 67.66 |
Resurvey 1
| Year_Quarter | freq | pct_valid | pct_tot |
|---|---|---|---|
| 1987.4 | 1 | 0.02 | 0.01 |
| 2008.2 | 617 | 10.26 | 3.12 |
| 2008.3 | 5186 | 86.22 | 26.19 |
| 2008.4 | 211 | 3.51 | 1.07 |
| <NA> | 13788 | NA | 69.63 |
Resurvey 2
| Year_Quarter | freq | pct_valid | pct_tot |
|---|---|---|---|
| 2013.3 | 1440 | 21.37 | 5.70 |
| 2013.4 | 1980 | 29.38 | 7.84 |
| 2014.1 | 767 | 11.38 | 3.04 |
| 2014.2 | 1744 | 25.88 | 6.91 |
| 2014.3 | 808 | 11.99 | 3.20 |
| <NA> | 18513 | NA | 73.31 |
Between-survey agreement
No agreement analysis available
International Coordinating Centre, China Kadoorie Biobank (CKB), CTSU, Nuffield Department of Population Health, University of Oxford Old Road Campus, Headington, Oxford, OX3 7LF
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Copyright China Kadoorie Biobank (CKB), University of Oxford, (2024)
Page generated: 27-02-2024