Variable breakdown
smoking_category
Section and category
Smoking.Basic
Description
“Smoking category”
Additional information
| Metadata | |
|---|---|
| contents | Categorised |
| is_mandatory | Yes |
Data summary
Baseline
| value | freq | pct_valid | pct_tot |
|---|---|---|---|
| Never smoker | 319495 | 61.99 | 61.99 |
| Occasional smoker | 29244 | 5.67 | 5.67 |
| Ex regular smoker | 30719 | 5.96 | 5.96 |
| Smoker | 135955 | 26.38 | 26.38 |
| <NA> | 0 | NA | 0.00 |
Resurvey 1
| value | freq | pct_valid | pct_tot |
|---|---|---|---|
| Never smoker | 12787 | 64.57 | 64.57 |
| Occasional smoker | 1001 | 5.05 | 5.05 |
| Ex regular smoker | 1257 | 6.35 | 6.35 |
| Smoker | 4758 | 24.03 | 24.03 |
| <NA> | 0 | NA | 0.00 |
Resurvey 2
| value | freq | pct_valid | pct_tot |
|---|---|---|---|
| Never smoker | 17091 | 68.22 | 67.68 |
| Occasional smoker | 1224 | 4.89 | 4.85 |
| Ex regular smoker | 1613 | 6.44 | 6.39 |
| Smoker | 5126 | 20.46 | 20.30 |
| <NA> | 198 | NA | 0.78 |
Between-survey agreement
Fleiss’ Kappa for m Raters:| N.participants | Surveys | Statistic | Coefficient | Z.statistic | p.value |
|---|---|---|---|---|---|
| 14888 | 3 | Kappa | 0.77 | 221.027 | 0 |
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