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DQI-3002

Definition

Observed time-date values are not admissible according to the allowed time and date ranges.

Explanation

This indicator checks for violations of admissibility ranges for time and date values.

Based on the study design and conduct such ranges can normally precisely be defined to identify inadmissible codings of processual aspects of a study.

Another point of application may be related to study outcomes, e.g. responses of participants on the year of some treatment.

Example

It is known that data collection in a study started on June 1st 2015 and ended March 16th 2016. Yet, a subset of data appears with dates ranging from April to May 2015. A closer inspection reveals that those dates belong to a pre-study and related observations should not be counted with the main study.

Guidance

Any violation of an admissibility rule triggers a data cleaning process with the intention to replace the wrong value by the correct one. If this is not possible affected observations should at least be flagged to be adequately handled during analyses.

Interpretation

The higher the number or percentage of inadmissible time-date values, the lower the data quality.

Implementations

Literature