Weather extremes and perinatal mortality - Seasonal and ethnic differences in northern Sweden, 1800-1895
BACKGROUND: Many studies have shown the impact of heat and cold on total and age-specific mortality, but knowledge gaps remain regarding weather vulnerability of very young infants. This study assessed the association of temperature extremes with perinatal mortality (stillbirths and deaths in the fi...
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Umeå universitet, Institutionen för epidemiologi och global hälsa
2019
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ftumeauniv:oai:DiVA.org:umu-165076 2023-10-09T21:54:30+02:00 Weather extremes and perinatal mortality - Seasonal and ethnic differences in northern Sweden, 1800-1895 Schumann, Barbara Häggström Lundevaller, Erling Lena, Karlsson 2019 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-165076 https://doi.org/10.1371/journal.pone.0223538 eng eng Umeå universitet, Institutionen för epidemiologi och global hälsa Umeå universitet, Enheten för demografi och åldrandeforskning (CEDAR) Umeå universitet, Sociologiska institutionen PLOS PLOS ONE, 2019, 14:10, orcid:0000-0002-9722-0370 orcid:0000-0002-1561-4094 orcid:0000-0002-7406-7836 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-165076 doi:10.1371/journal.pone.0223538 PMID 31639133 ISI:000532571400009 Scopus 2-s2.0-85073743418 info:eu-repo/semantics/openAccess Public Health Global Health Social Medicine and Epidemiology Folkhälsovetenskap global hälsa socialmedicin och epidemiologi Article in journal info:eu-repo/semantics/article text 2019 ftumeauniv https://doi.org/10.1371/journal.pone.0223538 2023-09-22T13:54:22Z BACKGROUND: Many studies have shown the impact of heat and cold on total and age-specific mortality, but knowledge gaps remain regarding weather vulnerability of very young infants. This study assessed the association of temperature extremes with perinatal mortality (stillbirths and deaths in the first week of life), among two ethnic groups in pre-industrial northern Sweden. METHODS: We used population data of indigenous Sami and non-Sami in selected parishes of northern Sweden, 1800-1895, and monthly temperature data. Multiple logistic regression models were conducted to estimate the association of cold (<10th percentile of temperature) and warmth (>90th percentile) in the month of birth with perinatal mortality, adjusted for cold and warmth in the month prior birth and period, stratified by season and ethnicity. RESULTS: Perinatal mortality was slightly higher in Sami than in non-Sami (46 vs. 42 / 1000 live and stillbirths), but showed large variations across the region and over time. Both groups saw the highest perinatal mortality in autumn. For Sami, winter was a high-risk time as well, while for non-Sami, seasonality was less distinct. We found an association between exposure to cold and perinatal mortality among winter-born Sami [Odds ratio (OR) 1.91, 95% confidence interval (CI) 1.26-2.92, compared to moderate temperature], while there was little effect of cold or warmth during other seasons. Non-Sami, meanwhile, were affected in summer by warmth (OR 0.20, CI 0.05-0.81), and in autumn by cold (OR 0.39, CI 0.19-0.82). CONCLUSIONS: In this pre-industrial, subarctic setting, the indigenous Sami's perinatal mortality was influenced by extreme cold in winter, while non-Sami seemed to benefit from high temperature in summer and low temperature in autumn. Climate vulnerability of these two ethnic groups sharing the same environment was shaped by their specific lifestyles and living conditions. Article in Journal/Newspaper Northern Sweden sami Subarctic Umeå University: Publications (DiVA) PLOS ONE 14 10 e0223538 |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Public Health Global Health Social Medicine and Epidemiology Folkhälsovetenskap global hälsa socialmedicin och epidemiologi |
spellingShingle |
Public Health Global Health Social Medicine and Epidemiology Folkhälsovetenskap global hälsa socialmedicin och epidemiologi Schumann, Barbara Häggström Lundevaller, Erling Lena, Karlsson Weather extremes and perinatal mortality - Seasonal and ethnic differences in northern Sweden, 1800-1895 |
topic_facet |
Public Health Global Health Social Medicine and Epidemiology Folkhälsovetenskap global hälsa socialmedicin och epidemiologi |
description |
BACKGROUND: Many studies have shown the impact of heat and cold on total and age-specific mortality, but knowledge gaps remain regarding weather vulnerability of very young infants. This study assessed the association of temperature extremes with perinatal mortality (stillbirths and deaths in the first week of life), among two ethnic groups in pre-industrial northern Sweden. METHODS: We used population data of indigenous Sami and non-Sami in selected parishes of northern Sweden, 1800-1895, and monthly temperature data. Multiple logistic regression models were conducted to estimate the association of cold (<10th percentile of temperature) and warmth (>90th percentile) in the month of birth with perinatal mortality, adjusted for cold and warmth in the month prior birth and period, stratified by season and ethnicity. RESULTS: Perinatal mortality was slightly higher in Sami than in non-Sami (46 vs. 42 / 1000 live and stillbirths), but showed large variations across the region and over time. Both groups saw the highest perinatal mortality in autumn. For Sami, winter was a high-risk time as well, while for non-Sami, seasonality was less distinct. We found an association between exposure to cold and perinatal mortality among winter-born Sami [Odds ratio (OR) 1.91, 95% confidence interval (CI) 1.26-2.92, compared to moderate temperature], while there was little effect of cold or warmth during other seasons. Non-Sami, meanwhile, were affected in summer by warmth (OR 0.20, CI 0.05-0.81), and in autumn by cold (OR 0.39, CI 0.19-0.82). CONCLUSIONS: In this pre-industrial, subarctic setting, the indigenous Sami's perinatal mortality was influenced by extreme cold in winter, while non-Sami seemed to benefit from high temperature in summer and low temperature in autumn. Climate vulnerability of these two ethnic groups sharing the same environment was shaped by their specific lifestyles and living conditions. |
format |
Article in Journal/Newspaper |
author |
Schumann, Barbara Häggström Lundevaller, Erling Lena, Karlsson |
author_facet |
Schumann, Barbara Häggström Lundevaller, Erling Lena, Karlsson |
author_sort |
Schumann, Barbara |
title |
Weather extremes and perinatal mortality - Seasonal and ethnic differences in northern Sweden, 1800-1895 |
title_short |
Weather extremes and perinatal mortality - Seasonal and ethnic differences in northern Sweden, 1800-1895 |
title_full |
Weather extremes and perinatal mortality - Seasonal and ethnic differences in northern Sweden, 1800-1895 |
title_fullStr |
Weather extremes and perinatal mortality - Seasonal and ethnic differences in northern Sweden, 1800-1895 |
title_full_unstemmed |
Weather extremes and perinatal mortality - Seasonal and ethnic differences in northern Sweden, 1800-1895 |
title_sort |
weather extremes and perinatal mortality - seasonal and ethnic differences in northern sweden, 1800-1895 |
publisher |
Umeå universitet, Institutionen för epidemiologi och global hälsa |
publishDate |
2019 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-165076 https://doi.org/10.1371/journal.pone.0223538 |
genre |
Northern Sweden sami Subarctic |
genre_facet |
Northern Sweden sami Subarctic |
op_relation |
PLOS ONE, 2019, 14:10, orcid:0000-0002-9722-0370 orcid:0000-0002-1561-4094 orcid:0000-0002-7406-7836 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-165076 doi:10.1371/journal.pone.0223538 PMID 31639133 ISI:000532571400009 Scopus 2-s2.0-85073743418 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0223538 |
container_title |
PLOS ONE |
container_volume |
14 |
container_issue |
10 |
container_start_page |
e0223538 |
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1779318082088468480 |