c_vpsys

nurse: which system did you use to take blood?

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	1380.00	27.31%
vacutainer needle	1	2590.00	51.26%
butterfly needle	2	1083.00	21.43%
	Total	5053.00	100.00%

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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.