Data
503,075 items of data are available, covering 484,410 participants, encoded using Data-Coding 
200.
Defined-instances run from 0 to 1, labelled using Instancing 
2.
 
2 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
483,761 participants, 483,761 items
Instance 1 : First repeat assessment visit (2012-13)
19,314 participants, 19,314 items
 
Notes
Identifier for device used to measure Sodium in urine
1 Related Data-Field
| Field ID | Description | Relationship | 
| 30530 | Sodium in urine | Current Field indicates the device used to produce result Field 30530 |