Variable breakdown

study_date_day

---

Section and category

Background.Basic

---

Description

“Study date: Day”

---

Additional information

	Metadata
contents	Two digit day
is_mandatory	Yes

---

Data summary

Baseline

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
16.3	8.43	1	9	16	24	31	10.38	15	0.52	-0.04	0	-1.14	515413	100

Qc

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
17.03	8.73	1	10	18	24	31	10.38	14	0.51	-0.17	0.02	-1.12	15816	100

Resurvey 1

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
15.99	8.57	1	9	16	23	31	10.38	14	0.54	-0.07	0.02	-1.17	19803	100

Resurvey 2

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
16.01	8.38	1	9	16	23	31	10.38	14	0.52	0.03	0.02	-1.11	25082	99.33

---

Between-survey agreement

Fleiss’ Kappa for m Raters:

N.participants	Surveys	Statistic	Coefficient	Z.statistic	p.value
483	4	Kappa	-0.004	-1.211	0.226

---

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