Variable breakdown

pill_first_use_age

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Section and category

Reproductive History.Contraceptive use

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Description

“How old were you when you first used oral contraceptives?”

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Additional information

	Metadata
validation	Hard min: 5 or First_period_age, Hard max: 80 or current age or Menopause_age or Pill_stopped_age
contents	Age in years
soft_min	20
soft_max	45
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
27.08	4.86	16	24	26	29	52	4.45	5	0.18	1.17	0.01	1.73	29880	5.8

Resurvey 1

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
27.03	4.6	19	24	26	29	50	4.45	5	0.17	1.19	0.07	2.03	1069	5.4

Resurvey 2

mean	sd	min	q1	med	q3	max	mad	iqr	cv	skewness	se.skewness	kurtosis	n.valid	pct.valid
27.15	4.83	18	24	26	29	53	2.97	5	0.18	1.61	0.07	4.05	1391	5.51

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Between-survey agreement

[1] “ICC:”

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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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Page generated: 27-02-2024