Accuracy and reliability

Overall accuracy

It is mandatory to report data concerning persons and overnight stays. The number of undisclosed values is more prominent in some variables than others, which is, for example, due to citizen not being asked or being able to answer the questions. In addition, missing check-in and check-out may potentially affect the accuracy of overall statistics.

Sampling error

Not relevant for this statistic.

Non-sampling error

A citizen can choose anonymity for the citizen and/or the brought children . Since anonymous people appear in the statistics, there may be repeat offenders who are not taken into account. For these it is also not possible to find background information.

There may be different practices for registration at the various crisis shelters, which can lead to measurement errors.

The number of children in the StatBank Denmark tables is calculated as the sum of reported social security numbers of children in the data. The variable "number of children" is also found in micro-data. Deviations between this variable and the sum of the social security numbers of children can occur, for example, due to input errors in the data that the crisis shelters report. There is currently no error check for this type of error.

During busy periods at the crisis shelters, it may happen that some stays are not registered. The scope is not estimated.

Quality management

Statistics Denmark follows the recommendations on organisation and management of quality given in the Code of Practice for European Statistics (CoP) and the implementation guidelines given in the Quality Assurance Framework of the European Statistical System (QAF). A Working Group on Quality and a central quality assurance function have been established to continuously carry through control of products and processes.

Quality assurance

Statistics Denmark follows the principles in the Code of Practice for European Statistics (CoP) and uses the Quality Assurance Framework of the European Statistical System (QAF) for the implementation of the principles. This involves continuous decentralized and central control of products and processes based on documentation following international standards. The central quality assurance function reports to the Working Group on Quality. Reports include suggestions for improvement that are assessed, decided and subsequently implemented.

Quality assessment

In some of the reported stays, the citizen has requested anonymity for the citizen and/or brought children, and they will thus be indicated with a fictitious social security numbers in the data. This means that not all citizens and children can be matched with register information. The possibility of anonymity also means that the number of duplicated is not precisely known.

Data revision - policy

Statistics Denmark revises published figures in accordance with the Revision Policy for Statistics Denmark. The common procedures and principles of the Revision Policy are for some statistics supplemented by a specific revision practice.

Data revision practice

Any revisions to previously published data are generally made with each new release, as data are published from 2017 up to the current reference year. Revisions may be due to the shelters having quality-assured their data, or because Statistics Denmark has improved its data processing. Each individual shelter must approve its data for the previous three years. Once the dataset for a given year has been compiled, the data can be compared with what was previously reported, and it can then be assessed whether the statistics should be revised upon publication.

All stays that were active during the reference year could be revised by the shelter. This also includes stays that, for example, began in the year prior to the reference year but had not yet received a discharge date. If a shelter has revisions relating to stays that were completed within the past three years but were not active during the reference year, they must contact Statistics Denmark so the data can be corrected.