Geographic variation in the incidence of nonfatal stroke in Finland. Are the observed differences real? FINMONICA Stroke Register Study Group.
We sought to find an explanation for the geographical variation in the incidence of nonfatal stroke detected in the FINMONICA stroke register during the period 1983-1985. Two separate investigations were made. In the first, a sample of approximately 100 nonfatal events drawn from each of the three m...
Published in: | Stroke |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Ovid Technologies (Wolters Kluwer Health)
1993
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1161/01.str.24.6.787 https://www.ahajournals.org/doi/pdf/10.1161/01.STR.24.6.787 |
id |
crovidcr:10.1161/01.str.24.6.787 |
---|---|
record_format |
openpolar |
spelling |
crovidcr:10.1161/01.str.24.6.787 2024-01-14T10:08:19+01:00 Geographic variation in the incidence of nonfatal stroke in Finland. Are the observed differences real? FINMONICA Stroke Register Study Group. Sarti, C 1993 http://dx.doi.org/10.1161/01.str.24.6.787 https://www.ahajournals.org/doi/pdf/10.1161/01.STR.24.6.787 en eng Ovid Technologies (Wolters Kluwer Health) Stroke volume 24, issue 6, page 787-791 ISSN 0039-2499 1524-4628 Advanced and Specialized Nursing Cardiology and Cardiovascular Medicine Neurology (clinical) journal-article 1993 crovidcr https://doi.org/10.1161/01.str.24.6.787 2023-12-15T10:17:28Z We sought to find an explanation for the geographical variation in the incidence of nonfatal stroke detected in the FINMONICA stroke register during the period 1983-1985. Two separate investigations were made. In the first, a sample of approximately 100 nonfatal events drawn from each of the three monitoring areas (North Karelia, Kuopio, and Turku/Loimaa) participating in FINMONICA was recoded by an independent coder. In the second, 29 nonfatal events from Kuopio and 29 from North Karelia were recorded by the neurologist of the other area. Kappa coefficients (kappa) were calculated to measure the proportion of agreement beyond chance among the different coders. A good level of agreement with the independent coder was found for each of the three areas; it was best for the cases from Turku/Loimaa (kappa = 0.896), followed by Kuopio (kappa = 0.792) and North Karelia (kappa = 0.616). In the second part of the investigation, agreement was higher for the stroke cases originating from Kuopio (kappa = 0.861) than for those from North Karelia (kappa = 0.563). In the latter there was discrepancy in the classification of the cases originally classified as no stroke. The results from the first part of the investigation suggest that the lower incidence of nonfatal stroke in Turku/Loimaa was real, confirming findings in previous studies. Differences in data entry, rather than in the interpretation of signs and symptoms of stroke, were the main cause of disagreement in the second part of the investigation, where the disagreement primarily concerned the cases classified as no stroke in North Karelia. The results also indicate that the different proportions of patients submitted to computerized brain tomography conceivably account for a good part of the difference in the incidence rates of nonfatal stroke between Kuopio and North Karelia. Article in Journal/Newspaper karelia* Ovid (via Crossref) Stroke 24 6 787 791 |
institution |
Open Polar |
collection |
Ovid (via Crossref) |
op_collection_id |
crovidcr |
language |
English |
topic |
Advanced and Specialized Nursing Cardiology and Cardiovascular Medicine Neurology (clinical) |
spellingShingle |
Advanced and Specialized Nursing Cardiology and Cardiovascular Medicine Neurology (clinical) Sarti, C Geographic variation in the incidence of nonfatal stroke in Finland. Are the observed differences real? FINMONICA Stroke Register Study Group. |
topic_facet |
Advanced and Specialized Nursing Cardiology and Cardiovascular Medicine Neurology (clinical) |
description |
We sought to find an explanation for the geographical variation in the incidence of nonfatal stroke detected in the FINMONICA stroke register during the period 1983-1985. Two separate investigations were made. In the first, a sample of approximately 100 nonfatal events drawn from each of the three monitoring areas (North Karelia, Kuopio, and Turku/Loimaa) participating in FINMONICA was recoded by an independent coder. In the second, 29 nonfatal events from Kuopio and 29 from North Karelia were recorded by the neurologist of the other area. Kappa coefficients (kappa) were calculated to measure the proportion of agreement beyond chance among the different coders. A good level of agreement with the independent coder was found for each of the three areas; it was best for the cases from Turku/Loimaa (kappa = 0.896), followed by Kuopio (kappa = 0.792) and North Karelia (kappa = 0.616). In the second part of the investigation, agreement was higher for the stroke cases originating from Kuopio (kappa = 0.861) than for those from North Karelia (kappa = 0.563). In the latter there was discrepancy in the classification of the cases originally classified as no stroke. The results from the first part of the investigation suggest that the lower incidence of nonfatal stroke in Turku/Loimaa was real, confirming findings in previous studies. Differences in data entry, rather than in the interpretation of signs and symptoms of stroke, were the main cause of disagreement in the second part of the investigation, where the disagreement primarily concerned the cases classified as no stroke in North Karelia. The results also indicate that the different proportions of patients submitted to computerized brain tomography conceivably account for a good part of the difference in the incidence rates of nonfatal stroke between Kuopio and North Karelia. |
format |
Article in Journal/Newspaper |
author |
Sarti, C |
author_facet |
Sarti, C |
author_sort |
Sarti, C |
title |
Geographic variation in the incidence of nonfatal stroke in Finland. Are the observed differences real? FINMONICA Stroke Register Study Group. |
title_short |
Geographic variation in the incidence of nonfatal stroke in Finland. Are the observed differences real? FINMONICA Stroke Register Study Group. |
title_full |
Geographic variation in the incidence of nonfatal stroke in Finland. Are the observed differences real? FINMONICA Stroke Register Study Group. |
title_fullStr |
Geographic variation in the incidence of nonfatal stroke in Finland. Are the observed differences real? FINMONICA Stroke Register Study Group. |
title_full_unstemmed |
Geographic variation in the incidence of nonfatal stroke in Finland. Are the observed differences real? FINMONICA Stroke Register Study Group. |
title_sort |
geographic variation in the incidence of nonfatal stroke in finland. are the observed differences real? finmonica stroke register study group. |
publisher |
Ovid Technologies (Wolters Kluwer Health) |
publishDate |
1993 |
url |
http://dx.doi.org/10.1161/01.str.24.6.787 https://www.ahajournals.org/doi/pdf/10.1161/01.STR.24.6.787 |
genre |
karelia* |
genre_facet |
karelia* |
op_source |
Stroke volume 24, issue 6, page 787-791 ISSN 0039-2499 1524-4628 |
op_doi |
https://doi.org/10.1161/01.str.24.6.787 |
container_title |
Stroke |
container_volume |
24 |
container_issue |
6 |
container_start_page |
787 |
op_container_end_page |
791 |
_version_ |
1788062739079364608 |