Section and category

Pollution.Details

Description

“In what year did the inside of your house stop being really coal-smoky in winter?”

Additional information

	Metadata
validation	Hard min: Year of birth or Winter_smoke_start_year, Hard max: Current year
contents	Four digit year
is_mandatory	No

Data summary

Baseline

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
1991.21	9.4	1939	1985	1992	1999	2008	10.38	14	0	-0.55	0.01	0.31	93425	18.13

Resurvey 1

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
1992.72	10.41	1949	1985	1992	2003	2008	11.86	18	0.01	-0.38	0.04	-0.29	3629	18.33

Resurvey 2

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
1999.51	11.22	1941	1990	2003	2009	2014	10.38	19	0.01	-0.85	0.03	0.03	5710	22.61

Between-survey agreement

[1] “Spearman’s correlation matrix:”

	Baseline	Resurvey1	Resurvey2
Baseline	1.000	0.758	0.645
Resurvey1	0.758	1.000	0.643
Resurvey2	0.645	0.643	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

Variable breakdown

winter_smoke_stop_year