Help : Stability
The Stability of a Data-Field or Dataset describes how 'fixed' the values are. There are four categories:
- Complete - all data has been collected and will never change, an example would be the date at which a participant joined UK Biobank;
- Updateable - all data has been collected, but the values may change over time, an example would be the volume of the initial blood samples collected by UKB which will decrease as new analyses are performed using them;
- Accruing - data is still being gathered;
- Ongoing - data is still being gathered and the values already held may change over time.
Data-Fields which are Accruing or Ongoing may be classified as Preview-Only
until such time as the data becomes less changeable.