Variable breakdown
smoking_stopped_years_ago
Section and category
Smoking.Details
Description
“How many years ago did you last stop smoking regularly?”
Additional information
| Metadata | |
|---|---|
| contents | No. of years |
| soft_max | Age 20 |
| hard_min | 0 |
| hard_max | 99 |
| is_mandatory | No |
Data summary
Baseline
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 8.7 | 8.53 | 0 | 2 | 6 | 12 | 60 | 5.93 | 10 | 0.98 | 1.52 | 0.01 | 2.67 | 38205 | 7.41 |
Resurvey 1
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 9.35 | 8.84 | 0 | 2 | 7 | 14 | 50 | 7.41 | 12 | 0.95 | 1.38 | 0.06 | 2.21 | 1508 | 7.62 |
Resurvey 2
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10.88 | 9.8 | 0 | 3 | 8 | 17 | 53 | 10.38 | 14 | 0.9 | 1.01 | 0.06 | 0.58 | 1878 | 7.44 |
Between-survey agreement
[1] “Spearman’s correlation matrix:”| Baseline | Resurvey1 | Resurvey2 | |
|---|---|---|---|
| Baseline | 1.000 | 0.884 | 0.700 |
| Resurvey1 | 0.884 | 1.000 | 0.733 |
| Resurvey2 | 0.700 | 0.733 | 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