Nordic registry-based cohort studies : possibilities and pitfalls when combining Nordic registry data
Aims: All five Nordic countries (Denmark, Finland, Iceland, Norway, and Sweden) have nationwide registries with similar data structure and validity, as well as personal identity numbers enabling linkage between registries. These resources provide opportunities for medical research that is based on l...
Published in: | Scandinavian Journal of Public Health |
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Language: | English |
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Inst för molekylär medicin och kirurgi / Dept of Molecular Medicine and Surgery
2018
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Online Access: | http://hdl.handle.net/10616/46265 |
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ftkarolinskainst:oai:openarchive.ki.se:10616/46265 2023-12-31T10:08:21+01:00 Nordic registry-based cohort studies : possibilities and pitfalls when combining Nordic registry data Maret-Ouda, John Tao, Wenjing Wahlin, Karl Lagergren, Jesper 2018-03-09 application/pdf http://hdl.handle.net/10616/46265 eng eng Inst för molekylär medicin och kirurgi / Dept of Molecular Medicine and Surgery Scandinavian Journal of Public Health info:eu-repo/semantics/altIdentifier/doi/10.1177/1403494817702336 1403-4948 http://hdl.handle.net/10616/46265 Article is made available in accordance with the publisher's policy and may be subject to copyright law. Please refer to the publisher's site for terms of use. info:eu-repo/semantics/article art acceptedVersion 2018 ftkarolinskainst https://doi.org/10.1177/1403494817702336 2023-12-06T23:37:09Z Aims: All five Nordic countries (Denmark, Finland, Iceland, Norway, and Sweden) have nationwide registries with similar data structure and validity, as well as personal identity numbers enabling linkage between registries. These resources provide opportunities for medical research that is based on large registry-based cohort studies with long and complete follow-up. This review describes practical aspects, opportunities, and challenges encountered when setting up all-Nordic registry-based cohort studies. Methods: Relevant articles describing registries often used for medical research in the Nordic countries were retrieved. Further, our experiences of conducting this type of study, including planning, acquiring permissions, data retrieval, and data cleaning and handling, and the possibilities and challenges we have encountered, are described. Results: Combining data from the Nordic countries makes it possible to create large and powerful cohorts. The main challenges include obtaining all permissions within each country, usually in the local language, and to retrieve the data. These challenges emphasise the importance of having experienced collaborators within each country. Following the acquisition of data, data management requires the understanding of differences between the variables to be used in the various countries. A concern is the long time required between initiation and completion. Conclusions: Nationwide Nordic registries can be combined into cohorts with high validity and statistical power, but the considerable expertise, workload, and time required to complete such cohorts should not be underestimated. Swedish Research Council, D0547801 Accepted Article in Journal/Newspaper Iceland Karolinska Institutet: Publications Scandinavian Journal of Public Health 45 17_suppl 14 19 |
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Karolinska Institutet: Publications |
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ftkarolinskainst |
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English |
description |
Aims: All five Nordic countries (Denmark, Finland, Iceland, Norway, and Sweden) have nationwide registries with similar data structure and validity, as well as personal identity numbers enabling linkage between registries. These resources provide opportunities for medical research that is based on large registry-based cohort studies with long and complete follow-up. This review describes practical aspects, opportunities, and challenges encountered when setting up all-Nordic registry-based cohort studies. Methods: Relevant articles describing registries often used for medical research in the Nordic countries were retrieved. Further, our experiences of conducting this type of study, including planning, acquiring permissions, data retrieval, and data cleaning and handling, and the possibilities and challenges we have encountered, are described. Results: Combining data from the Nordic countries makes it possible to create large and powerful cohorts. The main challenges include obtaining all permissions within each country, usually in the local language, and to retrieve the data. These challenges emphasise the importance of having experienced collaborators within each country. Following the acquisition of data, data management requires the understanding of differences between the variables to be used in the various countries. A concern is the long time required between initiation and completion. Conclusions: Nationwide Nordic registries can be combined into cohorts with high validity and statistical power, but the considerable expertise, workload, and time required to complete such cohorts should not be underestimated. Swedish Research Council, D0547801 Accepted |
format |
Article in Journal/Newspaper |
author |
Maret-Ouda, John Tao, Wenjing Wahlin, Karl Lagergren, Jesper |
spellingShingle |
Maret-Ouda, John Tao, Wenjing Wahlin, Karl Lagergren, Jesper Nordic registry-based cohort studies : possibilities and pitfalls when combining Nordic registry data |
author_facet |
Maret-Ouda, John Tao, Wenjing Wahlin, Karl Lagergren, Jesper |
author_sort |
Maret-Ouda, John |
title |
Nordic registry-based cohort studies : possibilities and pitfalls when combining Nordic registry data |
title_short |
Nordic registry-based cohort studies : possibilities and pitfalls when combining Nordic registry data |
title_full |
Nordic registry-based cohort studies : possibilities and pitfalls when combining Nordic registry data |
title_fullStr |
Nordic registry-based cohort studies : possibilities and pitfalls when combining Nordic registry data |
title_full_unstemmed |
Nordic registry-based cohort studies : possibilities and pitfalls when combining Nordic registry data |
title_sort |
nordic registry-based cohort studies : possibilities and pitfalls when combining nordic registry data |
publisher |
Inst för molekylär medicin och kirurgi / Dept of Molecular Medicine and Surgery |
publishDate |
2018 |
url |
http://hdl.handle.net/10616/46265 |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
Scandinavian Journal of Public Health info:eu-repo/semantics/altIdentifier/doi/10.1177/1403494817702336 1403-4948 http://hdl.handle.net/10616/46265 |
op_rights |
Article is made available in accordance with the publisher's policy and may be subject to copyright law. Please refer to the publisher's site for terms of use. |
op_doi |
https://doi.org/10.1177/1403494817702336 |
container_title |
Scandinavian Journal of Public Health |
container_volume |
45 |
container_issue |
17_suppl |
container_start_page |
14 |
op_container_end_page |
19 |
_version_ |
1786841052401893376 |