Variable breakdown
sleep_hours
Section and category
Mental Health.Sleep
Description
“How many hours do you typically sleep per day (incl. naps)?”
Additional information
| Metadata | |
|---|---|
| contents | No. of hours |
| soft_min | 4 |
| soft_max | 9 |
| hard_min | 1 |
| hard_max | 20 |
| is_mandatory | Yes |
Data summary
Baseline
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 7.38 | 1.37 | 0 | 7 | 8 | 8 | 19 | 1.48 | 1 | 0.19 | -0.36 | 0 | 0.97 | 515413 | 100 |
Qc
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 7.4 | 1.32 | 1 | 7 | 8 | 8 | 14 | 1.48 | 1 | 0.18 | -0.32 | 0.02 | 0.96 | 15816 | 100 |
Resurvey 1
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 7.31 | 1.3 | 1 | 7 | 7 | 8 | 14 | 1.48 | 1 | 0.18 | -0.29 | 0.02 | 0.98 | 19803 | 100 |
Resurvey 2
| mean | sd | min | q1 | med | q3 | max | mad | iqr | cv | skewness | se.skewness | kurtosis | n.valid | pct.valid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 7.36 | 1.53 | 1 | 6 | 7 | 8 | 18 | 1.48 | 2 | 0.21 | -0.05 | 0.02 | 1.26 | 25054 | 99.22 |
Between-survey agreement
[1] “Spearman’s correlation matrix:”| Baseline | Qc | Resurvey1 | Resurvey2 | |
|---|---|---|---|---|
| Baseline | 1.000 | 0.640 | 0.398 | 0.382 |
| Qc | 0.640 | 1.000 | 0.462 | 0.442 |
| Resurvey1 | 0.398 | 0.462 | 1.000 | 0.377 |
| Resurvey2 | 0.382 | 0.442 | 0.377 | 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
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Copyright China Kadoorie Biobank (CKB), University of Oxford, (2024)
Page generated: 27-02-2024