Variable breakdown
pollution_enter
Section and category
Section Timings.Timings
Description
“Start time for Q6.1”
Additional information
| Metadata | |
|---|---|
| contents | Date and time |
| is_mandatory | Yes |
Data summary
Baseline
| Year_Quarter | freq | pct_valid | pct_tot |
|---|---|---|---|
| 2004.2 | 232 | 0.05 | 0.05 |
| 2004.3 | 6774 | 1.31 | 1.31 |
| 2004.4 | 24965 | 4.84 | 4.84 |
| 2005.1 | 23683 | 4.59 | 4.59 |
| 2005.2 | 36344 | 7.05 | 7.05 |
| 2005.3 | 32923 | 6.39 | 6.39 |
| 2005.4 | 39437 | 7.65 | 7.65 |
| 2006.1 | 27173 | 5.27 | 5.27 |
| 2006.2 | 38434 | 7.46 | 7.46 |
| 2006.3 | 37553 | 7.29 | 7.29 |
| 2006.4 | 39425 | 7.65 | 7.65 |
| 2007.1 | 26264 | 5.10 | 5.10 |
| 2007.2 | 39467 | 7.66 | 7.66 |
| 2007.3 | 39884 | 7.74 | 7.74 |
| 2007.4 | 42349 | 8.22 | 8.22 |
| 2008.1 | 25681 | 4.98 | 4.98 |
| 2008.2 | 33747 | 6.55 | 6.55 |
| 2008.3 | 1072 | 0.21 | 0.21 |
| 2009.3 | 5 | 0.00 | 0.00 |
| 2012.3 | 1 | 0.00 | 0.00 |
| <NA> | 0 | NA | 0.00 |
Resurvey 1
| Year_Quarter | freq | pct_valid | pct_tot |
|---|---|---|---|
| 1987.4 | 1 | 0.01 | 0.01 |
| 2008.2 | 2043 | 10.32 | 10.32 |
| 2008.3 | 17222 | 86.97 | 86.97 |
| 2008.4 | 537 | 2.71 | 2.71 |
| <NA> | 0 | NA | 0.00 |
Resurvey 2
| Year_Quarter | freq | pct_valid | pct_tot |
|---|---|---|---|
| 2013.3 | 4721 | 18.84 | 18.70 |
| 2013.4 | 7874 | 31.43 | 31.18 |
| 2014.1 | 2747 | 10.96 | 10.88 |
| 2014.2 | 6452 | 25.75 | 25.55 |
| 2014.3 | 3260 | 13.01 | 12.91 |
| <NA> | 198 | NA | 0.78 |
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