Variable breakdown
smoking_today_amount
Section and category
Smoking.Basic
Description
“How many cigarettes have you smoked today?”
Additional information
| Metadata | |
|---|---|
| contents | No. of cigarettes |
| soft_max | 60 |
| hard_min | 0 |
| is_mandatory | No |
| is_dependent_on | smoking_today |
Data summary
Baseline
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5.93 | 5.32 | 0 | 3 | 4 | 8 | 99 | 2.97 | 5 | 0.9 | 2.7 | 0.01 | 14.63 | 119725 | 23.23 |
Resurvey 1
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5.92 | 5.11 | 1 | 2 | 5 | 8 | 50 | 4.45 | 6 | 0.86 | 2.22 | 0.04 | 8.06 | 4199 | 21.2 |
Resurvey 2
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5.38 | 5.24 | 1 | 2 | 4 | 6 | 55 | 2.97 | 4 | 0.97 | 2.55 | 0.04 | 9.62 | 4531 | 17.94 |
Between-survey agreement
[1] “Spearman’s correlation matrix:”| Baseline | Resurvey1 | Resurvey2 | |
|---|---|---|---|
| Baseline | 1.000 | 0.305 | 0.269 |
| Resurvey1 | 0.305 | 1.000 | 0.339 |
| Resurvey2 | 0.269 | 0.339 | 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