Variable breakdown
smoking_last_hour_amount
Section and category
Smoking.Basic
Description
“How many cigarettes have you smoked in the last hour?”
Additional information
| Metadata | |
|---|---|
| validation | Soft max: 5 if occasional smoker, Hard max: 20 or Smoking_today_amount |
| contents | No. of cigarettes |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.95 | 0.99 | 0 | 0 | 1 | 1 | 15 | 1.48 | 1 | 1.04 | 1.66 | 0.01 | 6.39 | 119725 | 23.23 |
Resurvey 1
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.88 | 0.95 | 0 | 0 | 1 | 1 | 8 | 1.48 | 1 | 1.07 | 1.41 | 0.04 | 3.02 | 4199 | 21.2 |
Resurvey 2
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.93 | 1.25 | 0 | 0 | 1 | 1 | 20 | 1.48 | 1 | 1.35 | 3.85 | 0.04 | 33.97 | 4531 | 17.94 |
Between-survey agreement
[1] “Spearman’s correlation matrix:”| Baseline | Resurvey1 | Resurvey2 | |
|---|---|---|---|
| Baseline | 1.000 | 0.200 | 0.141 |
| Resurvey1 | 0.200 | 1.000 | 0.164 |
| Resurvey2 | 0.141 | 0.164 | 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