Risks of small-for-gestational-age births in immigrants: A nationwide epidemiological study in Sweden

Li, Xinjun; Sundquist, Kristina; Sundquist, Jan

doi:10.1177/1403494812458845

Cited by 16 publications

(11 citation statements)

References 24 publications

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“…In agreement with our results, several previous studies report that immigrant women from developing countries give birth to infants with lower birthweight than European women . In particular, women from conflict‐zone countries seem to give birth to low birthweight infants …”

Section: Discussionsupporting

confidence: 93%

Offspring birthweight and placental weight in immigrant women from conflict‐zone countries; does length of residence in the host country matter? A population study in Norway

Eskild

Sommerfelt

Skau

et al. 2019

Acta Obstet Gynecol Scand

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Acta Obstet Gynecol Scand. 2020;99:615-622. | 615 wileyonlinelibrary.com/journal/aogs | INTRODUC TI ONLow birthweight has been associated with increased morbidity and mortality in childhood, and also in adult life. [1][2][3][4] Low birthweight is considered a significant global health problem, and the World Health Organization has a goal of 30% reduction in the occurrence of low birthweight by 2025. 5 Such a goal assumes that low birthweight is caused by modifiable factors. AbstractIntroduction: We aimed to estimate differences in offspring birthweight and placental weight between Norwegian women and immigrants in Norway from countries with armed conflicts. We also studied whether length of residence in Norway was associated with offspring birthweight and placental weight. Material and methods:We included in our study all singleton births in Norway at gestational week 28 or beyond during the years 1999-2014, to mothers who were born in Somalia, Afghanistan, Iraq (total immigrants n = 18 817), or Norway (n = 668 439).Data were obtained from The Medical Birth Registry of Norway and the Central Person Registry of Norway. We estimated the differences between Norwegian and immigrant women in mean offspring birthweight and mean placental weight by applying linear regression analyses. Adjustments were made for maternal age, parity, year of delivery, gestational age at delivery, preeclampsia, and diabetes. Results:The immigrant women had 206 g (95% CI 199 to 213 g) lower mean offspring birthweight and 16 g (95% CI 14 to 18 g) lower mean placental weight than Norwegian women. Immigrant women with ≥5 years of residence in Norway had higher offspring birthweight (40 g) and higher placental weight (17 g) than immigrant women with <5 years of residence.Conclusions: Immigrant mothers from Somalia, Afghanistan, and Iraq gave birth to infants and placentas with lower weight than Norwegian women. However, the difference between Norwegian women and immigrant women was reduced by length of residence in Norway. K E Y W O R D S birthweight, immigrants, placental weight, population study, refugeesThis is an open access article under the terms of the Creat ive Commo ns Attri bution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Discussionsupporting

confidence: 93%

Offspring birthweight and placental weight in immigrant women from conflict‐zone countries; does length of residence in the host country matter? A population study in Norway

Eskild

Sommerfelt

Skau

et al. 2019

Acta Obstet Gynecol Scand

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“…Compared to the results of Li et al with data from 1982 to 2006, FGR was twice as common in our cohort (8.5% vs. 4.1%) and newborn boys were more likely to be small for gestational age (boys 12.8% vs. 4.7%). Previous studies did not differentiate by gender [14].…”

Section: Discussionmentioning

confidence: 64%

“…Li et al investigated more than 1 million births in Sweden from 1982 to 2006. The authors found that 4.1% of newborns born to non-Swedish mothers met the criteria for SGA, compared to 3.3% in the Swedish population[14]. In Denmark, Pedersen et al conducted a similar analysis from 1978 to 2007 and found that migration was related to SGA rather than preterm births.…”

mentioning

confidence: 99%

Intrauterine growth restriction in a cohort of migrants in Germany

Ankert

Groten

Pletz

et al. 2020

Preprint

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Background: Migrant women may have an increased risk of adverse birth outcomes. This study analyses the occurrence of low birth weight, preterm birth and intrauterine growth restriction (IUGR) in pregnant migrants. Method: Cross-sectional study of 82 mother-child pairs of pregnant migrants attending medical care in Germany.Results: Median age was 27 years, 49% were of oriental-asian ethnicity and median year of migration was 2015. At least one previous pregnancy was reported in 76%. Delivery mode was caesarian section in 40%. Median gestational age was 39.7 weeks. Preterm birth occurred in 6.1%. Median gestational age for preterm birth was 32.3 weeks. Low birth weight (<2500 g) occurred in 6.1%. Birth weights below the 10th percentile of birth weight for gestational age were observed in 8.5% of the total cohort. Conclusions: Compared to German data no increased occurrence of low birth weight, preterm birth or IUGR was found. Of note, rate of caesarian section was higher than in the general population for reasons yet to be identified. The authors propose stratification according to migration status for the national documentation of birth outcomes in Germany.Trial registration: ClinicalTrails.gov, NCT03158298. Registered 18 May 2017 - Retrospectively registered, https://clinicaltrials.gov/ct2/show/NCT03158298

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“…However, the opposite factor, a higher risk of adverse birth outcomes for immigrant parents in Sweden [16], might then be at hand for boys of foreignborn parents. The risk of small for gestational age is found to be higher amongst immigrants in Sweden, especially from South European, African and Asian countries [18]. The risk of preterm birth is also higher in immigrants [19].…”

Section: Discussionmentioning

confidence: 92%

Epilepsy in second‐generation immigrants: a cohort study of all children up to 18 years of age in Sweden

Wändell

Fredrikson

Carlsson

et al. 2019

Euro J of Neurology

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Background and purpose Our purpose was to study the association between country of birth and incident epilepsy in second‐generation immigrants in Sweden. Methods The study population included all children (n = 4 023 149) aged up to 18 years in Sweden. Epilepsy was defined as at least one registered diagnosis of epilepsy in the National Patient Register. The incidence of epilepsy, using individuals with Swedish‐born parents as referents, was assessed by Cox regression, expressed in hazard ratios (HRs) and 95% confidence interval (95% CI). All models were stratified by sex and adjusted for age, geographical residence in Sweden, educational level, marital status, neighbourhood socioeconomic status and comorbid conditions, also using data from the Total Population Register. Results A total of 26 310 individuals had a registered epilepsy event, i.e. 6.5/1000 (6.6/1000 amongst boys and 6.3/1000 amongst girls). After adjustment, the risk of epilepsy was lower than in children of Swedish‐born parents. Amongst girls the significant HR was 0.85 (95% CI 0.81–0.88), but in boys only when adjusting also for comorbidity (HR 0.96, 95% CI 0.92–0.99). Amongst specific immigrant groups, a higher incidence of epilepsy was observed amongst boys with parents from Turkey and Africa, but not when adjusting for comorbidity, and a lower risk was observed in many other groups (boys with parents from Latvia, girls with parents from Finland, Iceland, Southern Europe, countries from the former Yugoslavia, and Asia). Conclusion The risk of epilepsy was lower in second‐generation immigrant children compared to children with Swedish‐born parents, but with substantial differences between different immigrant groups.

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Risks of small-for-gestational-age births in immigrants: A nationwide epidemiological study in Sweden

Cited by 16 publications

References 24 publications

Offspring birthweight and placental weight in immigrant women from conflict‐zone countries; does length of residence in the host country matter? A population study in Norway

Offspring birthweight and placental weight in immigrant women from conflict‐zone countries; does length of residence in the host country matter? A population study in Norway

Intrauterine growth restriction in a cohort of migrants in Germany

Epilepsy in second‐generation immigrants: a cohort study of all children up to 18 years of age in Sweden

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