Resolving observation period end date without exact information on a last day
Issue # and location
Issue Summary
Resolving observation_period_end_date without exact information on a last day
Convention type
Table
CDM table
OBSERVATION_PERIOD
CDM field
observation_period_end_date
Links to issue discussion
Provenance of data
General
The ratified convention
It is often the case that the idea of Observation Periods does not exist in source data. In those cases, the observation_period_end_date can be inferred as the last event date available for the person.
Date of ratification/published
NA
Downstream implications
This convention can lead to a bias in survival studies. Namely, healthy persons will have shorter observation periods and not contributing to survival time as much.
Link to DQD check
No
Related conventions/further information
NA