i_pno

person number

Datafile

xwaveid

Index term

Key Linking Variable

Value label	Value	Absolute frequency	Relative frequency
missing	-9	81275	55.65%
[Value >= 0]	1	64779	44.35%
	Total	146054	100.0%

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Saved variables

What else is Understanding Society doing?

Understanding Society Wave 15

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Understanding Society Wave 15 – what can data users expect?

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10 Dec 2025

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Photo of talk at an Understanding Society conference

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A call for abstracts is now open - present your research at our Biosocial Conference

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ESRC Institute for Social and Economic Research University of Essex

The Economic and Social Research Council is the primary funder of the study
The Study is led by a team at the Institute for Social and Economic Research (ISER) at the University of Essex.