Variable breakdown

sbp_second

---

Section and category

Physical Exam.Blood pressure

---

Description

“Second SBP measurement”

---

Additional information

	Metadata
validation	Soft min: 80 or (Sbp_first - 20), Soft max: 220 or (Sbp_first + 20)
contents	No. of mmHg
hard_min	50
hard_max	300
is_mandatory	Yes

---

Data summary

Baseline

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
130.07	21.26	64	115	127	141	284	19.27	26	0.16	0.9	0	1.31	515413	100

Qc

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
128.13	19.32	76	115	126	139	241	17.79	24	0.15	0.74	0.02	0.97	15816	100

Resurvey 1

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
125.43	19.91	77	111	123	136	249	19.27	25	0.16	0.84	0.02	1.13	19803	100

Resurvey 2

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
135.8	20.66	54	121	134	148	246	20.76	27	0.15	0.64	0.02	0.55	25082	99.33

---

Between-survey agreement

[1] “Spearman’s correlation matrix:”

	Baseline	Qc	Resurvey1	Resurvey2
Baseline	1.000	0.821	0.701	0.535
Qc	0.821	1.000	0.681	0.527
Resurvey1	0.701	0.681	1.000	0.619
Resurvey2	0.535	0.527	0.619	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