National Rates of Uterine Rupture are not Associated with Rates of Previous Caesarean Delivery: Results from the Nordic Obstetric Surveillance Study

Lotte B. Colmorn; Jens Langhoff-Roos; Maija Jakobsson; Anna Maija Tapper; Mika Gissler; Pelle G Lindqvist; Karin Källen; Karin Gottvall; Kari Klungsøyr; Per Bøhrdahl; Ragnhild I Bjarnadóttir; Lone Krebs

doi:10.1111/ppe.12356

National Rates of Uterine Rupture are not Associated with Rates of Previous Caesarean Delivery: Results from the Nordic Obstetric Surveillance Study

Lotte B. Colmorn, Jens Langhoff-Roos, Maija Jakobsson, Anna Maija Tapper, Mika Gissler, Pelle G Lindqvist, Karin Källen, Karin Gottvall, Kari Klungsøyr, Per Bøhrdahl, Ragnhild I Bjarnadóttir, Lone Krebs

Department of Clinical Medicine

3 Citations (Scopus)

Abstract

BACKGROUND: Previous caesarean delivery and intended mode of delivery after caesarean are well-known individual risk factors for uterine rupture. We examined if different national rates of uterine rupture are associated with differences in national rates of previous caesarean delivery and intended mode of delivery after a previous caesarean delivery.

METHODS: This study is an ecological study based on data from a retrospective cohort in the Nordic countries. Data on uterine rupture were collected prospectively in each country as part of the Nordic obstetric surveillance study and included 91% of all Nordic deliveries. Information on the comparison population was retrieved from the national medical birth registers. Incidence rate ratios by previous caesarean delivery and intended mode of delivery after caesarean were modelled using Poisson regression.

RESULTS: The incidence of uterine rupture was 7.8/10 000 in Finland and 4.6/10 000 in Denmark. Rates of caesarean (21.3%) and previous caesarean deliveries (11.5%) were highest in Denmark, while the rate of intended vaginal delivery after caesarean was highest in Finland (72%). National rates of uterine rupture were not associated with the population rates of previous caesarean but increased by 35% per 1% increase in the population rate of intended vaginal delivery and in the subpopulation of women with previous caesarean delivery by 4% per 1% increase in the rate of intended vaginal delivery.

CONCLUSION: National rates of uterine rupture were not associated with national rates of previous caesarean, but increased with rates of intended vaginal delivery after caesarean.

Original language	English
Journal	Paediatric and Perinatal Epidemiology
Volume	31
Issue number	3
Pages (from-to)	176-182
Number of pages	7
ISSN	0269-5022
DOIs	https://doi.org/10.1111/ppe.12356
Publication status	Published - May 2017

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Journal Article

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10.1111/ppe.12356

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Colmorn, L. B., Langhoff-Roos, J., Jakobsson, M., Tapper, A. M., Gissler, M., Lindqvist, P. G., Källen, K., Gottvall, K., Klungsøyr, K., Bøhrdahl, P., Bjarnadóttir, R. I., & Krebs, L. (2017). National Rates of Uterine Rupture are not Associated with Rates of Previous Caesarean Delivery: Results from the Nordic Obstetric Surveillance Study. Paediatric and Perinatal Epidemiology, 31(3), 176-182. https://doi.org/10.1111/ppe.12356

National Rates of Uterine Rupture are not Associated with Rates of Previous Caesarean Delivery : Results from the Nordic Obstetric Surveillance Study. / Colmorn, Lotte B.; Langhoff-Roos, Jens; Jakobsson, Maija et al.

In: Paediatric and Perinatal Epidemiology, Vol. 31, No. 3, 05.2017, p. 176-182.

Research output: Contribution to journal › Journal article › Research › peer-review

Colmorn, LB, Langhoff-Roos, J, Jakobsson, M, Tapper, AM, Gissler, M, Lindqvist, PG, Källen, K, Gottvall, K, Klungsøyr, K, Bøhrdahl, P, Bjarnadóttir, RI & Krebs, L 2017, 'National Rates of Uterine Rupture are not Associated with Rates of Previous Caesarean Delivery: Results from the Nordic Obstetric Surveillance Study', Paediatric and Perinatal Epidemiology, vol. 31, no. 3, pp. 176-182. https://doi.org/10.1111/ppe.12356

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abstract = "BACKGROUND: Previous caesarean delivery and intended mode of delivery after caesarean are well-known individual risk factors for uterine rupture. We examined if different national rates of uterine rupture are associated with differences in national rates of previous caesarean delivery and intended mode of delivery after a previous caesarean delivery.METHODS: This study is an ecological study based on data from a retrospective cohort in the Nordic countries. Data on uterine rupture were collected prospectively in each country as part of the Nordic obstetric surveillance study and included 91% of all Nordic deliveries. Information on the comparison population was retrieved from the national medical birth registers. Incidence rate ratios by previous caesarean delivery and intended mode of delivery after caesarean were modelled using Poisson regression.RESULTS: The incidence of uterine rupture was 7.8/10 000 in Finland and 4.6/10 000 in Denmark. Rates of caesarean (21.3%) and previous caesarean deliveries (11.5%) were highest in Denmark, while the rate of intended vaginal delivery after caesarean was highest in Finland (72%). National rates of uterine rupture were not associated with the population rates of previous caesarean but increased by 35% per 1% increase in the population rate of intended vaginal delivery and in the subpopulation of women with previous caesarean delivery by 4% per 1% increase in the rate of intended vaginal delivery.CONCLUSION: National rates of uterine rupture were not associated with national rates of previous caesarean, but increased with rates of intended vaginal delivery after caesarean.",

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author = "Colmorn, {Lotte B.} and Jens Langhoff-Roos and Maija Jakobsson and Tapper, {Anna Maija} and Mika Gissler and Lindqvist, {Pelle G} and Karin K{\"a}llen and Karin Gottvall and Kari Klungs{\o}yr and Per B{\o}hrdahl and Bjarnad{\'o}ttir, {Ragnhild I} and Lone Krebs",

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doi = "10.1111/ppe.12356",

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T1 - National Rates of Uterine Rupture are not Associated with Rates of Previous Caesarean Delivery

T2 - Results from the Nordic Obstetric Surveillance Study

AU - Colmorn, Lotte B.

AU - Langhoff-Roos, Jens

AU - Jakobsson, Maija

AU - Tapper, Anna Maija

AU - Gissler, Mika

AU - Lindqvist, Pelle G

AU - Källen, Karin

AU - Gottvall, Karin

AU - Klungsøyr, Kari

AU - Bøhrdahl, Per

AU - Bjarnadóttir, Ragnhild I

AU - Krebs, Lone

PY - 2017/5

Y1 - 2017/5

N2 - BACKGROUND: Previous caesarean delivery and intended mode of delivery after caesarean are well-known individual risk factors for uterine rupture. We examined if different national rates of uterine rupture are associated with differences in national rates of previous caesarean delivery and intended mode of delivery after a previous caesarean delivery.METHODS: This study is an ecological study based on data from a retrospective cohort in the Nordic countries. Data on uterine rupture were collected prospectively in each country as part of the Nordic obstetric surveillance study and included 91% of all Nordic deliveries. Information on the comparison population was retrieved from the national medical birth registers. Incidence rate ratios by previous caesarean delivery and intended mode of delivery after caesarean were modelled using Poisson regression.RESULTS: The incidence of uterine rupture was 7.8/10 000 in Finland and 4.6/10 000 in Denmark. Rates of caesarean (21.3%) and previous caesarean deliveries (11.5%) were highest in Denmark, while the rate of intended vaginal delivery after caesarean was highest in Finland (72%). National rates of uterine rupture were not associated with the population rates of previous caesarean but increased by 35% per 1% increase in the population rate of intended vaginal delivery and in the subpopulation of women with previous caesarean delivery by 4% per 1% increase in the rate of intended vaginal delivery.CONCLUSION: National rates of uterine rupture were not associated with national rates of previous caesarean, but increased with rates of intended vaginal delivery after caesarean.

AB - BACKGROUND: Previous caesarean delivery and intended mode of delivery after caesarean are well-known individual risk factors for uterine rupture. We examined if different national rates of uterine rupture are associated with differences in national rates of previous caesarean delivery and intended mode of delivery after a previous caesarean delivery.METHODS: This study is an ecological study based on data from a retrospective cohort in the Nordic countries. Data on uterine rupture were collected prospectively in each country as part of the Nordic obstetric surveillance study and included 91% of all Nordic deliveries. Information on the comparison population was retrieved from the national medical birth registers. Incidence rate ratios by previous caesarean delivery and intended mode of delivery after caesarean were modelled using Poisson regression.RESULTS: The incidence of uterine rupture was 7.8/10 000 in Finland and 4.6/10 000 in Denmark. Rates of caesarean (21.3%) and previous caesarean deliveries (11.5%) were highest in Denmark, while the rate of intended vaginal delivery after caesarean was highest in Finland (72%). National rates of uterine rupture were not associated with the population rates of previous caesarean but increased by 35% per 1% increase in the population rate of intended vaginal delivery and in the subpopulation of women with previous caesarean delivery by 4% per 1% increase in the rate of intended vaginal delivery.CONCLUSION: National rates of uterine rupture were not associated with national rates of previous caesarean, but increased with rates of intended vaginal delivery after caesarean.

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DO - 10.1111/ppe.12356

M3 - Journal article

C2 - 28425589

SN - 0269-5022

VL - 31

SP - 176

EP - 182

JO - Paediatric and Perinatal Epidemiology

JF - Paediatric and Perinatal Epidemiology

IS - 3

ER -

National Rates of Uterine Rupture are not Associated with Rates of Previous Caesarean Delivery: Results from the Nordic Obstetric Surveillance Study

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