Faculty of Health and Social Sciences, Western Norway University of Applied Sciences, Bergen, Norway.
Department of Clinical Science, University of Bergen, Bergen, Norway.
Acta Obstet Gynecol Scand. 2021 Apr;100(4):658-665. doi: 10.1111/aogs.14067. Epub 2021 Jan 23.
Placental abruption is a serious complication in pregnancy. Its incidence varies across countries, but the information of how placental abruption varies in immigrant populations is limited. The aims of this study were to estimate the incidence of placental abruption in immigrant women compared with non-immigrants by maternal country and region of birth, reason for immigration, and length of residence.
We conducted a nationwide population-based study using data from the Medical Birth Registry of Norway and Statistics Norway (1990-2016). The study sample included 1 558 174 pregnancies, in which immigrant women accounted for 245 887 pregnancies and 1 312 287 pregnancies were to non-immigrants. Crude and adjusted odds ratios with 95% CI for placental abruption in immigrant women compared with non-immigrants were estimated by logistic regression with robust standard error estimations (accounting for within-mother clustering). Adjustment variables included year of birth, maternal age, parity, multiple pregnancies, chronic hypertension, and level of education.
The incidence of placental abruption decreased during the study period for both immigrants (from 0.68% to 0.44%) and non-immigrants (from 0.80% to 0.34%). Immigrant women from sub-Saharan Africa had an adjusted odds ratio of 1.35 (95% CI 1.15-1.58) compared with non-immigrants for placental abruption, whereas immigrant women from Ethiopia had an adjusted odds ratio of 2.39 (95% CI 1.67-3.41). We found a small variation in placental abruption incidence by other countries or regions of birth, length of residence, and reason for immigration.
Immigrant women from sub-Saharan Africa, especially Ethiopia, have increased odds for placental abruption when giving birth in Norway. Reason for immigration and length of residence had little impact on the incidence of placental abruption.
胎盘早剥是妊娠的严重并发症。其在各国的发病率不同，但有关移民人群中胎盘早剥的信息有限。本研究的目的是按产妇的母国和出生地区、移民原因和居住时间，估计移民妇女与非移民妇女相比胎盘早剥的发生率。
我们使用挪威医学出生登记处和挪威统计局（1990-2016 年）的数据进行了一项全国性的基于人群的研究。研究样本包括 1 558 174 例妊娠，其中移民妇女占 245 887 例，非移民妇女占 1 312 287 例。采用逻辑回归和稳健标准误差估计（考虑到母亲内聚类），估计移民妇女与非移民妇女相比胎盘早剥的粗比和调整后的比值比及其 95%置信区间。调整变量包括出生年份、产妇年龄、产次、多胎妊娠、慢性高血压和教育程度。
在研究期间，移民（从 0.68%降至 0.44%）和非移民（从 0.80%降至 0.34%）的胎盘早剥发生率均下降。与非移民相比，来自撒哈拉以南非洲的移民妇女发生胎盘早剥的调整比值比为 1.35（95%可信区间 1.15-1.58），而来自埃塞俄比亚的移民妇女发生胎盘早剥的调整比值比为 2.39（95%可信区间 1.67-3.41）。我们发现，其他国家或地区的出生、居住时间和移民原因对胎盘早剥的发生率有很小的差异。
在挪威分娩的来自撒哈拉以南非洲的移民妇女，尤其是来自埃塞俄比亚的移民妇女，发生胎盘早剥的几率增加。移民原因和居住时间对胎盘早剥的发生率影响不大。
