Variable breakdown
study_date_year
Section and category
Background.Basic
Description
“Study date: Year”
Additional information
| Metadata | |
|---|---|
| contents | Four digit year |
| is_mandatory | Yes |
Data summary
Baseline
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2006.14 | 1.11 | 2004 | 2005 | 2006 | 2007 | 2009 | 1.48 | 2 | 0 | -0.04 | 0 | -0.86 | 515413 | 100 |
Qc
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2006.27 | 1.14 | 2004 | 2005 | 2006 | 2007 | 2008 | 1.48 | 2 | 0 | -0.12 | 0.02 | -0.9 | 15816 | 100 |
Resurvey 1
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2008 | 0 | 2008 | 2008 | 2008 | 2008 | 2008 | 0 | 0 | 0 | NaN | 0.02 | NaN | 19803 | 100 |
Resurvey 2
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2013.5 | 0.5 | 2013 | 2013 | 2013 | 2014 | 2014 | 0 | 1 | 0 | 0.01 | 0.02 | -2 | 25082 | 99.33 |
Between-survey agreement
Fleiss’ Kappa for m Raters:| N.participants | Surveys | Statistic | Coefficient | Z.statistic | p.value |
|---|---|---|---|---|---|
| 483 | 4 | Kappa | -0.016 | -1.875 | 0.061 |
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