: Data-Field 21102

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Data

537,693 items of data are available, covering 497,733 participants, encoded using Data-Coding 1182.
Defined-instances run from 0 to 2, labelled using Instancing 2.

Graph illustrating main data

3 Instances

Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
497,403 participants, 497,403 items
Graph illustrating main data

Instance 1 : First repeat assessment visit (2012-13)
20,323 participants, 20,323 items
Graph illustrating main data

Instance 2 : Imaging visit (2014+)
19,967 participants, 19,967 items
Graph illustrating main data

Notes

Domestic water hardness measured 1 year before baseline recruitment started (2005) and during follow-up (2013).

This field can be used, for example, to determine survey measurement year versus year of participant assessment via Field 53.

5 Related Data-Fields

Field ID	Description	Relationship
21104	Ca concentration	Field 21104 measures are related to a survey year captured in Current Field
21103	CaCO3 concentration	Field 21103 measures are related to a survey year captured in Current Field
21105	Mg concentration	Field 21105 measures are related to a survey year captured in Current Field
21100	Water hardness (USGS classification)	Field 21100 measures are related to a survey year captured in Current Field
21101	Water hardness (WHO classification)	Field 21101 measures are related to a survey year captured in Current Field

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