Variable breakdown

fev1_first_x100

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Section and category

Physical Exam.Lung function

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Description

“First FEV1”

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Additional information

	Metadata
contents	No. of litres (x100)
soft_min	40
soft_max	550
hard_min	10
hard_max	700
is_mandatory	No

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Data summary

Baseline

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
219.51	66.59	11	174	215	261	573	63.75	87	0.3	0.29	0	0.12	515413	100

Qc

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
221.84	64.28	33	179	218	261	489	60.79	82	0.29	0.29	0.02	0.25	15816	100

Resurvey 1

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
216.89	74.34	10	167	213	263	620	71.16	96	0.34	0.33	0.02	0.3	19483	98.38

Resurvey 2

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
202.17	74.36	11	152	197	247	696	69.68	95	0.37	0.46	0.02	0.64	24302	96.24

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Between-survey agreement

[1] “Spearman’s correlation matrix:”

	Baseline	Qc	Resurvey1	Resurvey2
Baseline	1.000	0.878	0.743	0.696
Qc	0.878	1.000	0.753	0.700
Resurvey1	0.743	0.753	1.000	0.695
Resurvey2	0.696	0.700	0.695	1.000

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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