Ambient temperature and stillbirth risks in northern Sweden, 1880–1950
Background: Climate vulnerability of the unborn can contribute to adverse birth outcomes, in particular, but it is still not well understood. We investigated the association between ambient temperature and stillbirth risk among a historical population in northern Sweden (1880–1950). Methods: We used...
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Online Access: | http://dx.doi.org/10.1097/ee9.0000000000000176 https://journals.lww.com/10.1097/EE9.0000000000000176 |
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crovidcr:10.1097/ee9.0000000000000176 2024-09-15T18:26:04+00:00 Ambient temperature and stillbirth risks in northern Sweden, 1880–1950 Karlsson, Lena Junkka, Johan Lundevaller, Erling Häggström Schumann, Barbara 2021 http://dx.doi.org/10.1097/ee9.0000000000000176 https://journals.lww.com/10.1097/EE9.0000000000000176 en eng Ovid Technologies (Wolters Kluwer Health) http://creativecommons.org/licenses/by-nc-nd/4.0/ Environmental Epidemiology volume 5, issue 6, page e176 ISSN 2474-7882 journal-article 2021 crovidcr https://doi.org/10.1097/ee9.0000000000000176 2024-08-27T04:11:50Z Background: Climate vulnerability of the unborn can contribute to adverse birth outcomes, in particular, but it is still not well understood. We investigated the association between ambient temperature and stillbirth risk among a historical population in northern Sweden (1880–1950). Methods: We used digitized parish records and daily temperature data from the study region covering coastal and inland communities some 600 km north of Stockholm, Sweden. The data included 141,880 births, and 3,217 stillbirths, corresponding to a stillbirth rate of 22.7 (1880–1950). The association between lagged temperature (0–7 days before birth) and stillbirths was estimated using a time-stratified case-crossover design. Incidence risk ratios (IRR) with 95% confidence intervals were computed, and stratified by season and sex. Results: We observed that the stillbirth risk increased both at low and high temperatures during the extended summer season (April to September), at −10°C, and the IRR was 2.3 (CI 1.28, 4.00) compared to the minimum mortality temperature of +15°C. No clear effect of temperature during the extended winter season (October to March) was found. Climate vulnerability was greater among the male fetus compared to the female counterparts. Conclusion: In this subarctic setting before and during industrialization, both heat and cold during the warmer season increased the stillbirth risk. Urbanization and socio-economic development might have contributed to an uneven decline in climate vulnerability of the unborn. Article in Journal/Newspaper Northern Sweden Subarctic Ovid Environmental Epidemiology 5 6 e176 |
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English |
description |
Background: Climate vulnerability of the unborn can contribute to adverse birth outcomes, in particular, but it is still not well understood. We investigated the association between ambient temperature and stillbirth risk among a historical population in northern Sweden (1880–1950). Methods: We used digitized parish records and daily temperature data from the study region covering coastal and inland communities some 600 km north of Stockholm, Sweden. The data included 141,880 births, and 3,217 stillbirths, corresponding to a stillbirth rate of 22.7 (1880–1950). The association between lagged temperature (0–7 days before birth) and stillbirths was estimated using a time-stratified case-crossover design. Incidence risk ratios (IRR) with 95% confidence intervals were computed, and stratified by season and sex. Results: We observed that the stillbirth risk increased both at low and high temperatures during the extended summer season (April to September), at −10°C, and the IRR was 2.3 (CI 1.28, 4.00) compared to the minimum mortality temperature of +15°C. No clear effect of temperature during the extended winter season (October to March) was found. Climate vulnerability was greater among the male fetus compared to the female counterparts. Conclusion: In this subarctic setting before and during industrialization, both heat and cold during the warmer season increased the stillbirth risk. Urbanization and socio-economic development might have contributed to an uneven decline in climate vulnerability of the unborn. |
format |
Article in Journal/Newspaper |
author |
Karlsson, Lena Junkka, Johan Lundevaller, Erling Häggström Schumann, Barbara |
spellingShingle |
Karlsson, Lena Junkka, Johan Lundevaller, Erling Häggström Schumann, Barbara Ambient temperature and stillbirth risks in northern Sweden, 1880–1950 |
author_facet |
Karlsson, Lena Junkka, Johan Lundevaller, Erling Häggström Schumann, Barbara |
author_sort |
Karlsson, Lena |
title |
Ambient temperature and stillbirth risks in northern Sweden, 1880–1950 |
title_short |
Ambient temperature and stillbirth risks in northern Sweden, 1880–1950 |
title_full |
Ambient temperature and stillbirth risks in northern Sweden, 1880–1950 |
title_fullStr |
Ambient temperature and stillbirth risks in northern Sweden, 1880–1950 |
title_full_unstemmed |
Ambient temperature and stillbirth risks in northern Sweden, 1880–1950 |
title_sort |
ambient temperature and stillbirth risks in northern sweden, 1880–1950 |
publisher |
Ovid Technologies (Wolters Kluwer Health) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1097/ee9.0000000000000176 https://journals.lww.com/10.1097/EE9.0000000000000176 |
genre |
Northern Sweden Subarctic |
genre_facet |
Northern Sweden Subarctic |
op_source |
Environmental Epidemiology volume 5, issue 6, page e176 ISSN 2474-7882 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1097/ee9.0000000000000176 |
container_title |
Environmental Epidemiology |
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5 |
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6 |
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e176 |
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1810466519384064000 |