Variable breakdown
age_at_study_date_x100
Section and category
Background.Basic
Description
“Age at study date (calculated from Date of Birth and Study Date as given above)”
Additional information
| Metadata | |
|---|---|
| contents | Age in years to 2 d.p. |
| soft_min | 33 |
| soft_max | 76 |
| hard_min | 5 |
| hard_max | 100 |
| is_mandatory | Yes |
Data summary
Baseline
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5202.84 | 1070.58 | 1871 | 4292 | 5149 | 5971 | 9561 | 1251.31 | 1679 | 0.21 | 0.27 | 0 | -0.84 | 515413 | 100 |
Resurvey 1
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5464.39 | 1062.76 | 2743 | 4544 | 5426 | 6233 | 8509 | 1267.62 | 1689 | 0.19 | 0.23 | 0.02 | -0.84 | 19803 | 100 |
Resurvey 2
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5949.03 | 1017.4 | 2908 | 5075 | 5927 | 6667 | 10375 | 1197.94 | 1592 | 0.17 | 0.23 | 0.02 | -0.77 | 25082 | 99.33 |
Between-survey agreement
[1] “Spearman’s correlation matrix:”| Baseline | Resurvey1 | Resurvey2 | |
|---|---|---|---|
| Baseline | 1.000 | 0.997 | 0.997 |
| Resurvey1 | 0.997 | 1.000 | 0.999 |
| Resurvey2 | 0.997 | 0.999 | 1.000 |
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