b_samparm

nurse: code from which arm the blood was taken:

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	5699.00	36.42%
right	1	5076.00	32.44%
left	2	4548.00	29.07%
both	3	323.00	2.06%
	Total	15646.00	100.00%

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Photo of family walking their dog in the countryside

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Calendar Year 2023 data now available

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22 Oct 2025

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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.