ArticleBMC pregnancy and childbirth2014
Preterm subtypes by immigrants' length of residence in Norway: a population-based study.
Article in BMC pregnancy and childbirth, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 3 of them syntheses that pooled it.
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Who cites it
17 citing papers in PubMed, 3 syntheses or guidelines pooled it, 41 citations in OpenAlex.
- Perinatal and Neonatal Outcomes in Immigrants From Conflict-Zone Countries: A Systematic Review and Meta-Analysis of Observational Studies.Frontiers in public health · 2022Pooled it
- Adverse Pregnancy Outcomes and International Immigration Status: A Systematic Review and Meta-analysis.Annals of global health · 2022Pooled it
- A Systematic Review of the Prevalence of Gestational Diabetes in Norway.International journal of environmental research and public health · 2021Pooled it
- Multicultural doula support and obstetric and neonatal outcomes: a multi-centre comparative study in Norway.BMC pregnancy and childbirth · 2024Article
- Pregnancy outcomes of forced migrants in the Netherlands: A national registry-based study.Journal of migration and health · 2024Article
- Experiences of childbirth care among immigrant and non-immigrant women: a cross-sectional questionnaire study from a hospital in Norway.BMC pregnancy and childbirth · 2023Article
- Use of non-governmental maternity services and pregnancy outcomes among undocumented women: a cohort study from Norway.BMC pregnancy and childbirth · 2022Article
- Association between maternal country of birth and preterm birth: A population-based register study of 910,752 deliveries.Scandinavian journal of public health · 2021Article
- Challenges and barriers to optimal maternity care for recently migrated women - a mixed-method study in Norway.BMC pregnancy and childbirth · 2021Article
- Variations in Relationships Between Perceived Stress and Birth Outcomes by Immigration Status.Maternal and child health journal · 2020Article
- The provision of epidural analgesia during labor according to maternal birthplace: a Norwegian register study.BMC pregnancy and childbirth · 2020Article
- Health Advantages and Disparities in Preterm Birth Among Immigrants Despite Disparate Sociodemographic, Behavioral, and Maternal Risk Factors in San Diego, California.Maternal and child health journal · 2020Article
- Article
- Are risk factors for preterm and early-term live singleton birth the same? A population-based study in France.BMJ open · 2018Article
- Diabetes Risk by Length of Residence among Somali Women in Oslo Area.Journal of diabetes research · 2016Article
- What contributes to disparities in the preterm birth rate in European countries?Current opinion in obstetrics & gynecology · 2015Review
- Birth Outcomes of Latin Americans in Two Countries with Contrasting Immigration Admission Policies: Canada and Spain.PloS one · 2015Article
Corrections and comments
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Authors and funding
4 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe reduction of the preterm delivery (PTD) rate is a maternal and child health target. Elevated rates have been found among several immigrant groups, but few studies have distinguished between PTD according to the mode of birth start. In addition, migrants' birth outcomes have further been shown to be affected by the time in residence; however, the association to PTD subtypes has not previously been assessed. In this study we examined if the risk of spontaneous and non-spontaneous, or iatrogenic, PTD among immigrants in Norway varied according to the length of residence and the country of birth, and compared with the risks among the majority population.
methodsWe linked population-based birth and immigration data for 40 709 singletons born to immigrant women from Iraq, Pakistan, the Philippines, Somalia, Sri Lanka and Vietnam and 868 832 singletons born to non-immigrant women from 1990-2009. Associations between the length of residence and subtypes of PTD were estimated as relative risks (RRs) with 95% confidence intervals (CIs) from multivariable models.
resultsIn total, 48 191 preterm births occurred. Both spontaneous and non-spontaneous PTD rates were higher among immigrants (4.8% and 2.0%) than among non-immigrants (3.6% and 1.6%). Only non-spontaneous PTD was associated with longer lengths of residence (p trend <0.001). Recent immigrants (<5 years of residence) and non-immigrants had a similar risk of non-spontaneous PTD, whereas immigrants with lengths of residence of 5-9 years, 10-14 years and ≥ 15 years had adjusted RRs of 1.18 [95% CI 1.03,1.35], 1.43 [95% CI 1.20,1.71] and 1.66 [95% CI 1.41,1.96]. The association was reduced after further adjustments for maternal and infant morbidity. Conversely, the risk of spontaneous PTD among immigrants was not mitigated by length of residence, but varied with country of birth according to the duration of pregnancy in term births.
conclusionsNon-spontaneous PTD increased with the length of residence whereas spontaneous PTD remained elevated regardless of the length of residence. Policies to improve birth outcomes in ethnically mixed populations should address the modifiable causes of PTD rather than aiming to reduce absolute PTD rates.
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