Some CSO statistics are categorised as Under Reservation. This categorisation indicates that the quality of these statistics do not meet the standards required of official statistics published by the CSO.
This classification will actively alert users to the underlying quality deficiencies and inform them that further revisions can be expected as these deficiencies are resolved.
This approach of differentiating statistics based on quality concerns associated with the underlying data is consistent with other jurisdictions such as England and Wales.
The data supporting these release formats may be published on the CSO’s PxStat database or as Excel files.
For and example and further information see Statistics Under Reservation FAQ's