Variable breakdown
pill_use_years
Section and category
Reproductive History.Contraceptive use
Description
“For how long altogether have you used oral contraceptives?”
Additional information
| Metadata | |
|---|---|
| validation | Hard max: 70 or (Current age - pill_first_use_age + 1) or (Pill_stopped_age - Pill_first_use_age + 2) |
| contents | No. of years |
| soft_min | 1 |
| soft_max | 20 |
| hard_min | 0 |
| is_mandatory | No |
Data summary
Baseline
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3.61 | 4.33 | 0 | 1 | 2 | 4 | 35 | 1.48 | 3 | 1.2 | 2.38 | 0.01 | 5.93 | 29880 | 5.8 |
Resurvey 1
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3.46 | 4.12 | 0 | 1 | 2 | 4 | 25 | 1.48 | 3 | 1.19 | 2.4 | 0.07 | 5.98 | 1069 | 5.4 |
Resurvey 2
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3.69 | 4.51 | 0 | 1 | 2 | 5 | 30 | 1.48 | 4 | 1.22 | 2.35 | 0.07 | 5.87 | 1391 | 5.51 |
Between-survey agreement
[1] “Spearman’s correlation matrix:”| Baseline | Resurvey1 | Resurvey2 | |
|---|---|---|---|
| Baseline | 1.000 | 0.693 | 0.601 |
| Resurvey1 | 0.693 | 1.000 | 0.592 |
| Resurvey2 | 0.601 | 0.592 | 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
Tel: +44 (0)1865 743743 | Fax: +44 (0)1865 743985 | Email: ckbaccess@ndph.ox.ac.uk
Copyright China Kadoorie Biobank (CKB), University of Oxford, (2024)
Page generated: 27-02-2024