Sørbye Ingvil K, Vangen Siri, Juarez Sol P, Bolumar Francisco, Morisaki Naho, Gissler Mika, Andersen Anne-Marie N, Racape Judith, Small Rhonda, Wood Rachael, Urquia Marcelo L
Norwegian Advisory Unit for Women's Health, Department of Obstetrics, Oslo University Hospital, Norway.
Department of Public Health Sciences, Stockholm University, Sweden.
SSM Popul Health. 2019 Oct 21;9:100503. doi: 10.1016/j.ssmph.2019.100503. eCollection 2019 Dec.
Birthweights of babies born to migrant women are generally lower than those of babies born to native-born women. Favourable integration policies may improve migrants' living conditions and contribute to higher birthweights. We aimed to explore associations between integration policies, captured by the Migrant Integration Policy Index (MIPEX), with offspring birthweight among migrants from various world regions. In this cross-country study we pooled 31 million term birth records between 1998 and 2014 from ten high-income countries: Australia, Belgium, Canada, Denmark, Finland, Japan, Norway, Spain, Sweden and United Kingdom (Scotland). Birthweight differences in grams (g) were analysed with regression analysis for aggregate data and random effects models. Proportion of births to migrant women varied from 2% in Japan to 28% in Australia. The MIPEX score was not associated with birthweight in most migrant groups, but was positively associated among native-born (mean birthweight difference associated with a 10-unit increase in MIPEX: 105 g; 95% CI: 24, 186). Birthweight among migrants was highest in the Nordic countries and lowest in Japan and Belgium. Migrants from a given origin had heavier newborns in countries where the mean birthweight of native-born was higher and vice versa. Mean birthweight differences between migrants from the same origin and the native-born varied substantially across destinations (70 g-285 g). Birthweight among migrants does not correlate with MIPEX scores. However, birthweight of migrant groups aligned better with that of the native-born in destination counties. Further studies may clarify which broader social policies support migrant women and have impacts on perinatal outcomes.
移民女性所生孩子的出生体重通常低于本地出生女性所生孩子的出生体重。有利的融合政策可能会改善移民的生活条件，并有助于提高出生体重。我们旨在探讨由移民融合政策指数（MIPEX）衡量的融合政策与来自世界不同地区移民的后代出生体重之间的关联。在这项跨国研究中，我们汇总了1998年至2014年期间来自十个高收入国家的3100万例足月出生记录：澳大利亚、比利时、加拿大、丹麦、芬兰、日本、挪威、西班牙、瑞典和英国（苏格兰）。使用汇总数据的回归分析和随机效应模型分析了以克（g）为单位的出生体重差异。移民女性生育的比例从日本的2%到澳大利亚的28%不等。在大多数移民群体中，MIPEX分数与出生体重无关，但在本地出生人群中呈正相关（MIPEX增加10个单位相关的平均出生体重差异：105 g；95% CI：24，186）。移民的出生体重在北欧国家最高，在日本和比利时最低。来自特定原籍的移民在本地出生人口平均出生体重较高的国家所生新生儿体重更重，反之亦然。来自同一原籍的移民与本地出生人群之间的平均出生体重差异在不同目的地之间差异很大（70 g - 285 g）。移民的出生体重与MIPEX分数无关。然而，移民群体的出生体重在目的地国家与本地出生人群的出生体重更趋一致。进一步的研究可能会阐明哪些更广泛的社会政策支持移民女性并对围产期结局产生影响。
