: Data-Field 21100

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Data

537,460 items of data are available, covering 497,512 participants, encoded using Data-Coding 1180.
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
497,182 participants, 497,182 items
Graph illustrating main data

Instance 1 : First repeat assessment visit (2012-13)
20,317 participants, 20,317 items
Graph illustrating main data

Instance 2 : Imaging visit (2014+)
19,961 participants, 19,961 items
Graph illustrating main data

Notes

United States Geological Survey classification of CaCO3 concentration into four groups: soft water (0-60 mg/L), moderately hard water (60-120 mg/L), hard water (120-180 mg/L) and very hard water (> 180 mg/L).

1 Related Data-Field

Field ID	Description	Relationship
21102	Year of survey	Current Field measures are related to a survey year captured in Field 21102

0 Resources

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