Variable breakdown
study_date
Section and category
Background.Basic
Description
“Study date: Full (Includes local time i.e. GMT + 8 hours)”
Additional information
| Metadata | |
|---|---|
| contents | DD/MM/YYYY HH:mm:ss |
| is_mandatory | Yes |
Data summary
Baseline
| Year_Quarter | freq | pct_valid | pct_tot |
|---|---|---|---|
| 2004.2 | 232 | 0.05 | 0.05 |
| 2004.3 | 6772 | 1.31 | 1.31 |
| 2004.4 | 24965 | 4.84 | 4.84 |
| 2005.1 | 23683 | 4.59 | 4.59 |
| 2005.2 | 36336 | 7.05 | 7.05 |
| 2005.3 | 32935 | 6.39 | 6.39 |
| 2005.4 | 39436 | 7.65 | 7.65 |
| 2006.1 | 27175 | 5.27 | 5.27 |
| 2006.2 | 38433 | 7.46 | 7.46 |
| 2006.3 | 37552 | 7.29 | 7.29 |
| 2006.4 | 39425 | 7.65 | 7.65 |
| 2007.1 | 26264 | 5.10 | 5.10 |
| 2007.2 | 39468 | 7.66 | 7.66 |
| 2007.3 | 39883 | 7.74 | 7.74 |
| 2007.4 | 42348 | 8.22 | 8.22 |
| 2008.1 | 25681 | 4.98 | 4.98 |
| 2008.2 | 33748 | 6.55 | 6.55 |
| 2008.3 | 1072 | 0.21 | 0.21 |
| 2009.3 | 5 | 0.00 | 0.00 |
| <NA> | 0 | NA | 0.00 |
Qc
| Year_Quarter | freq | pct_valid | pct_tot |
|---|---|---|---|
| 2004.2 | 5 | 0.03 | 0.03 |
| 2004.3 | 181 | 1.14 | 1.14 |
| 2004.4 | 668 | 4.22 | 4.22 |
| 2005.1 | 542 | 3.43 | 3.43 |
| 2005.2 | 1065 | 6.73 | 6.73 |
| 2005.3 | 878 | 5.55 | 5.55 |
| 2005.4 | 1175 | 7.43 | 7.43 |
| 2006.1 | 715 | 4.52 | 4.52 |
| 2006.2 | 1244 | 7.87 | 7.87 |
| 2006.3 | 1083 | 6.85 | 6.85 |
| 2006.4 | 1158 | 7.32 | 7.32 |
| 2007.1 | 751 | 4.75 | 4.75 |
| 2007.2 | 1225 | 7.75 | 7.75 |
| 2007.3 | 980 | 6.20 | 6.20 |
| 2007.4 | 1659 | 10.49 | 10.49 |
| 2008.1 | 979 | 6.19 | 6.19 |
| 2008.2 | 1296 | 8.19 | 8.19 |
| 2008.3 | 212 | 1.34 | 1.34 |
| <NA> | 0 | NA | 0.00 |
Resurvey 1
| Year_Quarter | freq | pct_valid | pct_tot |
|---|---|---|---|
| 2008.2 | 2043 | 10.32 | 10.32 |
| 2008.3 | 17223 | 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 | 18.82 | 18.70 |
| 2013.4 | 7888 | 31.45 | 31.24 |
| 2014.1 | 2754 | 10.98 | 10.91 |
| 2014.2 | 6458 | 25.75 | 25.57 |
| 2014.3 | 3261 | 13.00 | 12.91 |
| <NA> | 170 | NA | 0.67 |
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