Concomitant preterm birth and severe small-for-gestational age birth weight among infants of immigrant mothers in Ontario originating from the Philippines and East Asia: a population-based study

Bartsch, Emily; Park, Alison L.; Jairam, Jennifer A.; Ray, Joel G.

doi:10.1136/bmjopen-2016-015386

Cited by 10 publications

(7 citation statements)

References 27 publications

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“…In a previous study, Filipinos in Japan were reported to have the highest infant and fetal mortality rates [12]. A similar high risk among mothers from the Philippines has been observed in Canada and Korea [5,23]. In addition, in this study, a high risk for preterm birth was observed among mothers from Brazil and other countries.…”

Section: Discussionsupporting

confidence: 83%

Association of maternal nationality with preterm birth and low birth weight rates: analysis of nationwide data in Japan from 2016 to 2020

Okui

Sato

Morokuma

et al. 2023

matern health, neonatol and perinatol

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Background The rate of low birth weight or preterm birth is known to vary according to the birth place of mothers. However, in Japan, studies that investigated the association between maternal nationalities and adverse birth outcomes are few. In this study, we investigated the association between maternal nationalities and adverse birth outcomes. Methods We obtained live birth data from the Vital Statistics 2016–2020 of the Ministry of Health, Labour, and Welfare. We used data on maternal age, sex, parity, gestational age, birth weight, number of fetuses, household occupation, paternal nationality, and maternal nationality for each infant. We compared the rates of preterm birth and low birth weight at term among mothers whose nationalities were Japan, Korea, China, Philippines, Brazil, and other countries. Log binomial regression model was used to investigate the association between maternal nationality and the two birth outcomes using the other infants’ characteristics as covariates. Results In the analysis, data on 4,290,917 singleton births were used. Mothers from Japan, Korea, China, the Philippines, Brazil, and other nations had preterm birth rates of 4.61%, 4.16%, 3.97%, 7.43%, 7.69%, and 5.61%, respectively. The low birth weight rate among Japanese mothers was 5.36% and was the highest among the maternal nationalities. Regression analysis showed that the relative risk for preterm birth among Filipino, Brazilian, and mothers from other countries (1.520, 1.329, and 1.222, respectively) was statistically significantly higher compared with Japanese mothers. In contrast, the relative risk for Korean and Chinese mothers (0.870 and 0.899, respectively) was statistically significantly lower compared with Japanese mothers. Mothers from Korea, China, the Philippines, Brazil, and other nations had a relative risk for low birth weight that was statistically significantly lower than that of Japanese mothers (0.664, 0.447, 0.867, 0.692, and 0.887, respectively). Conclusions Support for mothers from the Philippines, Brazil, and other countries are necessary to prevent preterm birth. A future study is necessary to investigate the differences in characteristics among mothers of different nationalities in order to uncover the reason for the high risk for low birth weight among Japanese mothers.

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Section: Discussionsupporting

confidence: 83%

Association of maternal nationality with preterm birth and low birth weight rates: analysis of nationwide data in Japan from 2016 to 2020

Okui

Sato

Morokuma

et al. 2023

matern health, neonatol and perinatol

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“…We will retrospectively evaluate adverse pregnancy outcomes among Ontario women physicians and nonphysicians of reproductive age who have experienced at least one childbirth >20 weeks GA. All outcomes of interest were chosen for their clinical relevance and established methodology for ascertainment from ICES databases such as MOMBABY, DAD and OHIP, using standard diagnostic and procedural codes [46][47][48][49][50][51][52][53][54] (see online supplemental table 3).…”

Section: Discussionmentioning

confidence: 99%

“…and/or Ontario-specific algorithms to ensure accuracy [46][47][48][49][50][51][52][53][54] ; and have used databases that are validated 55 56 or periodically reabstracted. 57 Aim 1: compare reproductive patterns in women physicians and non-physicians Rationale and overview Numerous survey-based studies suggest that women physicians frequently delay childbearing and subsequently experience a higher rate of infertility compared with the general population.…”

Section: Open Accessmentioning

confidence: 99%

Reproductive patterns, pregnancy outcomes and parental leave practices of women physicians in Ontario, Canada: the Dr Mom Cohort Study protocol

et al. 2020

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IntroductionSurveys and qualitative studies suggest that women physicians may delay childbearing, be at increased risk of adverse peripartum complications when they do become pregnant, and face discrimination and lower earnings as a result of parenthood. Observational studies enrolling large, representative samples of women physicians are needed to accurately evaluate their reproductive patterns, pregnancy outcomes, parental leave practices and earnings. This protocol provides a detailed research plan for such studies.Methods and analysisThe Dr Mom Cohort Study encompasses a series of retrospective observational studies of women physicians in Ontario, Canada. All practising physicians in Ontario are registered with the College of Physicians and Surgeons of Ontario (CPSO). By linking a dataset of physicians from the CPSO to existing provincial administrative databases, which hold health data and physician billing records, we will be able to retrospectively assess the healthcare utilisation, work practices and pregnancy outcomes of women physicians at the population level. Specific outcomes of interest include: (1) rates and timing of pregnancy; (2) pregnancy-related care and complications; and (3) duration of parental leave and subsequent earnings, each of which will be evaluated with regression methods appropriate to the form of the outcome. We estimate that, at minimum, 5000 women physicians will be eligible for inclusion.Ethics and disseminationThis protocol has been approved by the Research Ethics Board at St. Michael’s Hospital in Toronto, Ontario, Canada (#18–248). We will disseminate findings through several peer-reviewed publications, presentations at national and international meetings, and engagement of physicians, residency programmes, department heads and medical societies.

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“…Vaxtarskerðing fósturs og fyrirburafaeðingar haldast oft í hendur en í þessari rannsókn var vaxtarskerðing einungis haerri hjá konum í mið-HDI hópnum miðað við íslenskar konur. Það er í samraemi við niðurstöður rannsóknar 32 sem sýndi mun á tíðni eftir upprunalandi og niðurstöður frá Ástralíu 1 og Danmörku. 7 Sjálfkrafa fyrirburafaeðing var algengari hjá konum í mið-og laegsta-HDI-hópnum en hins vegar var fyrirburafaeðing mark-taekt sjaldnar framkölluð hjá konum í laegsta-HDI-hópnum.…”

Section: Umraeðaunclassified

Preterm birth among Icelandic and migrant women in Iceland during 1997-2018 and main contributing factors

Guðmundsdóttir

Vigfusdottir

Gottfreðsdóttir

2023

LBL

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INTRODUCTION: Migrant women often experience worse perinatal outcomes during pregnancy, birth, and puerperium than native women, but results regarding preterm birth vary. The objective of this study was to detect the prevalence and risk factors of preterm birth among Icelandic and migrant women in Iceland. MATERIAL AND METHODS: The study was a population-based cohort study with data from the Icelandic Medical Birth Register. The cohort included all women who had a singleton birth from 22w0d to 36w6d of pregnancy in the years 1997-2018, a total of 89 170 women. The group was divided in two; women with an Icelandic citizenship and women with foreign citizenship, that were further divided according to the Human Development Index (HDI) of their country of citizenship. Preterm birth rate and risk factor prevalence was analysed according to this classification and significance in differences measured with a chi-square test. RESULTS: Significance in differences of preterm birth was found between Icelandic (4.4%) and migrant women (5.6%) (p<0.001). Migrant women from middle-HDI countries gave birth preterm in 5.5% of cases (p<0.01) and women from low-HDI countries in 6.4% of cases (p<0.001). Migrant women were more often diagnosed with urinary tract infections, diabetes, intrauterine growth restriction and premature rupture of membranes, but less often with pre-eclampsia, obesity, placental defect, mental health issues and age <18 years (p<0.05). CONCLUSION: Migrant women in Iceland from middle-HDI and low-HDI countries give birth preterm more often than Icelandic women. A difference in risk factors is also present and needs further research. The findings can be used in continuing development of prenatal care for migrant women in Iceland.

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Concomitant preterm birth and severe small-for-gestational age birth weight among infants of immigrant mothers in Ontario originating from the Philippines and East Asia: a population-based study

Cited by 10 publications

References 27 publications

Association of maternal nationality with preterm birth and low birth weight rates: analysis of nationwide data in Japan from 2016 to 2020

Association of maternal nationality with preterm birth and low birth weight rates: analysis of nationwide data in Japan from 2016 to 2020

Reproductive patterns, pregnancy outcomes and parental leave practices of women physicians in Ontario, Canada: the Dr Mom Cohort Study protocol

Preterm birth among Icelandic and migrant women in Iceland during 1997-2018 and main contributing factors

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