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Geographic variations in hip fracture incidence in a high-risk country stretching into the Arctic: a NOREPOS study

SUMMARY: There are geographic variations in hip fracture incidence rates across Norway, with a lower incidence in the coastal areas of the southwest and in the Arctic north, contrary to what may be expected with regard to vitamin D exposure from sunlight. The regional differences have become smaller...

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Autores principales: Forsén, L., Søgaard, A. J., Holvik, K., Meyer, H. E., Omsland, T. K., Stigum, H., Dahl, C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer London 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7280325/
https://www.ncbi.nlm.nih.gov/pubmed/32095840
http://dx.doi.org/10.1007/s00198-020-05346-8
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author Forsén, L.
Søgaard, A. J.
Holvik, K.
Meyer, H. E.
Omsland, T. K.
Stigum, H.
Dahl, C.
author_facet Forsén, L.
Søgaard, A. J.
Holvik, K.
Meyer, H. E.
Omsland, T. K.
Stigum, H.
Dahl, C.
author_sort Forsén, L.
collection PubMed
description SUMMARY: There are geographic variations in hip fracture incidence rates across Norway, with a lower incidence in the coastal areas of the southwest and in the Arctic north, contrary to what may be expected with regard to vitamin D exposure from sunlight. The regional differences have become smaller in recent years. INTRODUCTION: To investigate geographic variation in hip fracture incidence within Norway and regional differences in time trends. METHODS: All hip fractures treated in Norwegian hospitals 2002–2013 were included, and demographic information was obtained from Statistics Norway. Age-standardized incidence rates were calculated separately for 19 counties. Incidence rate ratios with 95% confidence intervals for county differences and time trends were estimated using Poisson regression. RESULTS: Age-standardized number of hip fractures per 10,000 person-years varied between counties from 69 to 84 in women and from 34 to 41 in men. The highest rates were observed in the southeastern capital city of Oslo, while rates were low in the four northernmost counties. There was an east-west gradient, with lower incidence in the coastal southwest compared with the southeast. Women showed a statistically significant decline during 2002–2013 in almost all counties (up to 31%). In men, only a few counties showed a decline. In both genders, hip fracture rates at age 80 in the combined five counties with the highest rates were significantly higher than in the combined five counties with the lowest rates across the period, although the trends converged over time. CONCLUSIONS: In Norway, the hip fracture incidence was lower in the north compared with the south. In addition, we observed an east-west gradient with the highest incidence in the southeast and lower incidence in the coastal southwest. While there has been an overall declining trend in hip fracture incidence over time, regional differences are still apparent. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s00198-020-05346-8) contains supplementary material, which is available to authorized users.
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spelling pubmed-72803252020-06-15 Geographic variations in hip fracture incidence in a high-risk country stretching into the Arctic: a NOREPOS study Forsén, L. Søgaard, A. J. Holvik, K. Meyer, H. E. Omsland, T. K. Stigum, H. Dahl, C. Osteoporos Int Original Article SUMMARY: There are geographic variations in hip fracture incidence rates across Norway, with a lower incidence in the coastal areas of the southwest and in the Arctic north, contrary to what may be expected with regard to vitamin D exposure from sunlight. The regional differences have become smaller in recent years. INTRODUCTION: To investigate geographic variation in hip fracture incidence within Norway and regional differences in time trends. METHODS: All hip fractures treated in Norwegian hospitals 2002–2013 were included, and demographic information was obtained from Statistics Norway. Age-standardized incidence rates were calculated separately for 19 counties. Incidence rate ratios with 95% confidence intervals for county differences and time trends were estimated using Poisson regression. RESULTS: Age-standardized number of hip fractures per 10,000 person-years varied between counties from 69 to 84 in women and from 34 to 41 in men. The highest rates were observed in the southeastern capital city of Oslo, while rates were low in the four northernmost counties. There was an east-west gradient, with lower incidence in the coastal southwest compared with the southeast. Women showed a statistically significant decline during 2002–2013 in almost all counties (up to 31%). In men, only a few counties showed a decline. In both genders, hip fracture rates at age 80 in the combined five counties with the highest rates were significantly higher than in the combined five counties with the lowest rates across the period, although the trends converged over time. CONCLUSIONS: In Norway, the hip fracture incidence was lower in the north compared with the south. In addition, we observed an east-west gradient with the highest incidence in the southeast and lower incidence in the coastal southwest. While there has been an overall declining trend in hip fracture incidence over time, regional differences are still apparent. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s00198-020-05346-8) contains supplementary material, which is available to authorized users. Springer London 2020-02-24 2020 /pmc/articles/PMC7280325/ /pubmed/32095840 http://dx.doi.org/10.1007/s00198-020-05346-8 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, which permits any non-commercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by-nc/4.0/.
spellingShingle Original Article
Forsén, L.
Søgaard, A. J.
Holvik, K.
Meyer, H. E.
Omsland, T. K.
Stigum, H.
Dahl, C.
Geographic variations in hip fracture incidence in a high-risk country stretching into the Arctic: a NOREPOS study
title Geographic variations in hip fracture incidence in a high-risk country stretching into the Arctic: a NOREPOS study
title_full Geographic variations in hip fracture incidence in a high-risk country stretching into the Arctic: a NOREPOS study
title_fullStr Geographic variations in hip fracture incidence in a high-risk country stretching into the Arctic: a NOREPOS study
title_full_unstemmed Geographic variations in hip fracture incidence in a high-risk country stretching into the Arctic: a NOREPOS study
title_short Geographic variations in hip fracture incidence in a high-risk country stretching into the Arctic: a NOREPOS study
title_sort geographic variations in hip fracture incidence in a high-risk country stretching into the arctic: a norepos study
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7280325/
https://www.ncbi.nlm.nih.gov/pubmed/32095840
http://dx.doi.org/10.1007/s00198-020-05346-8
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