Preterm and postterm birth in immigrant- and Swedish-born parents: a population register-based study

Khanolkar, Amal R.; Wedrén, Sara; Essén, Birgitta; Sparén, Pär; Koupil, Ilona

doi:10.1007/s10654-014-9986-0

Cited by 28 publications

(30 citation statements)

References 43 publications

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“… 25 Another study showed that Swedish fathers and non-Swedish mothers had higher risks of preterm birth but lower risks of post-term birth. 18 In a Canadian study, Canadian-origin fathers and foreign born mothers had lower birth weight and the birth weight was lower when they lived in the same ethnic high concentration area. 26 …”

Section: Discussionmentioning

confidence: 98%

Birth outcomes of immigrant women married to native men in the Republic of Korea: a population register-based study

Song¹,

Kim

Shin

et al. 2017

BMJ Open

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ObjectivesThe Republic of Korea (Korea) has experienced a steady increase in the number of births from immigrant women over the last 20 years. However, little is known about the birth outcomes of immigrant women in Korea. This study compared Korean birth data from immigrant and native women who married native men, and explored the factors that affected birth outcomes among immigrant women.DesignObservational cross-sectional study.SettingNationwide registry-based study in Korea.ParticipantsA total of 70 258 records from immigrant women and 1700 976 records from native women were examined using the National Birth Registration Database, from 2010 to 2013.Independent variableNative Korean women and immigrant women who married native men.OutcomesProportion of preterm births, post-term births, low birth weights and macrosomia.ResultsAdjusted ORs (aOR) were calculated for the adverse birth outcomes, and subgroup analyses were performed according to parity and mothers from three Asian countries (China, Vietnam, the Philippines). Multivariate logistic regression analyses were also conducted to evaluate the association of these factors with birth outcomes among immigrant women. Immigrant women had higher OR of post-term births (aOR 1.62; 95% CI 1.44 to 1.83) and low birth weights (aOR 1.17; CI 1.12 to 1.22). Mothers from the Philippines had higher OR of preterm births (aOR 1.26; CI 1.12 to 1.52) and Chinese mothers had higher OR of macrosomia (aOR 1.55; CI 1.44 to 1.66). The OR of post-term births and low birth weights was significantly higher in the first pregnancies of immigrant women.ConclusionsThis study has demonstrated higher proportions of adverse birth outcomes among immigrant women who married Korean men, compared with native women in Korea. Policies reducing the gap in birth outcomes between native and immigrant women are needed.

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Section: Discussionmentioning

confidence: 98%

Birth outcomes of immigrant women married to native men in the Republic of Korea: a population register-based study

Song¹,

Kim

Shin

et al. 2017

BMJ Open

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“…Confounders were chosen a priori based on literature. [33][34][35][36][37][38][39] We adjusted for the mother's country of birth, educational level, smoking status, parity (except in the sensitivity analyses of parity), age, calendar year of birth and BMI. Further, all models were analysed with and without adjustment for BMI when estimating effects of PsA on different outcomes.…”

Section: Discussionmentioning

confidence: 99%

Maternal and infant pregnancy outcomes in women with psoriatic arthritis: a Swedish nationwide cohort study

Remaeus

Stephansson

Johansson

et al. 2019

BJOG

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Objective Studies on pregnancy outcomes in psoriatic arthritis (PsA) are scarce and typically of small size. Available studies have reported conflicting results. The aim of this study was to describe maternal and infant pregnancy outcomes among women with PsA compared with women without PsA.Design Nationwide cohort study.Setting Nationwide Swedish registers.Population A total of 41 485 singleton pregnancies in 1997-2014, of which 541 pregnancies were identified with PsA exposure and 40 944 pregnancies were unexposed.Methods By linkage of national health and population register data, we obtained information on individual pregnancies and compared outcomes among pregnancies with PsA and non-PsA pregnancies. Relative risks were estimated by odds ratios (ORs) with 95% CIs using a generalised linear regression model with generalised estimating equations. Adjustments were made for maternal factors and calendar year of birth. Main outcome measures Maternal and infant pregnancy outcomes.Results Pregnancies to women with PsA had increased risks of preterm birth (adjusted OR 1.63; 95% CI 1.17-2.28), elective and emergency caesarean deliveries (adjusted OR 1.47; 95% CI 1.10-1.97 and adjusted OR 1.43; 95% CI 1.08-1.88, respectively) compared with non-PsA pregnancies. No increased risks were observed for pre-eclampsia, stillbirth or other infant outcomes apart from preterm birth. ConclusionThe majority of women with PsA have uneventful pregnancies with respect to adverse outcomes. In the present study, we found increased risks of preterm birth and caesarean delivery compared with non-PsA pregnancies.Keywords Pregnancy outcome, preterm birth, psoriatic arthritis.Tweetable abstract Women with psoriatic arthritis have uneventful pregnancies but are at increased risk of preterm birth and caesarean delivery.

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“…For example, some studies found higher risks, some found similar risks and others found mixed risks for specific Indian, Pakistani and Bangladeshi groups . There have been relatively few studies from other high‐income countries . Although a number of socio‐economic, obstetric and genetic explanations have been proposed to explain these differences, the mechanisms or reasons behind them are not well understood.…”

Section: Introductionmentioning

confidence: 99%

Ethnic differences in singleton preterm birth in England and Wales, 2006‐12: Analysis of national routinely collected data

Quigley

Macfarlane

et al. 2019

Paediatric Perinatal Epid

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BackgroundData recorded at birth and death registration in England and Wales have been routinely linked with data recorded at birth notification since 2006. These provide scope for detailed analyses on ethnic differences in preterm birth (PTB).ObjectivesWe aimed to investigate ethnic differences in PTB and degree of prematurity in England and Wales, taking into account maternal sociodemographic characteristics and to further explore the contribution of mother's country of birth to these ethnic differences in PTB.MethodsWe analysed PTB and degree of prematurity by ethnic group, using routinely collected and linked data for all singleton live births in England and Wales, 2006‐2012. Logistic regression was used to adjust for mother's age, marital status/registration type, area deprivation and mother's country of birth.ResultsIn the 4 634 932 births analysed, all minority ethnic groups except ‘Other White’ had significantly higher odds of PTB compared with White British babies (ORs between 1.04‐1.25); highest odds were in Black Caribbean, Indian, Bangladeshi and Pakistani groups. Ethnic differences in PTB tended to be greater at earlier gestational ages. In all ethnic groups, odds of PTB were lower for babies whose mothers were born outside the UK.ConclusionsIn England and Wales, Black Caribbean, Indian, Bangladeshi, Pakistani and Black African babies all have significantly increased odds of being born preterm compared with White British babies. Bangladeshis apart, these groups are particularly at risk of extremely PTB. In all ethnic groups, the odds of PTB are lower for babies whose mothers were born outside the UK. These ethnic differences do not appear to be wholly explained by area deprivation or other sociodemographic characteristics.

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Preterm and postterm birth in immigrant- and Swedish-born parents: a population register-based study

Cited by 28 publications

References 43 publications

Birth outcomes of immigrant women married to native men in the Republic of Korea: a population register-based study

Birth outcomes of immigrant women married to native men in the Republic of Korea: a population register-based study

Maternal and infant pregnancy outcomes in women with psoriatic arthritis: a Swedish nationwide cohort study

Ethnic differences in singleton preterm birth in England and Wales, 2006‐12: Analysis of national routinely collected data

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