Wen S W, Demissie K, Liu S, Marcoux S, Kramer M S
Bureau of Reproductive and Child Health, Laboratory Center for Disease Control, Health Canada, Ottawa, Ontario, Canada.
Paediatr Perinat Epidemiol. 2000 Oct;14(4):300-4. doi: 10.1046/j.1365-3016.2000.00280.x.
This study examined the relationship between male sex at birth and placenta praevia in 433031 mother/infant dyads (linked by a common institutional code and hospital admission number) in the Canadian province of Quebec, during the fiscal years of 1991/92-1995/96. The male-to-female ratio among pregnancies with and without placenta praevia was calculated and compared. The male-to-female ratio at birth was higher in pregnancies complicated by a placenta praevia (1.19) than in those without it (1.04; P < 0.02). This increased ratio persisted after accounting separately for the potential confounding and/or modifying effects of maternal age, infant birthweight and gestational age by stratified and multiple logistic regression analyses. We conclude that pregnant women with male babies carry a higher risk of placenta praevia.
本研究调查了1991/92至1995/96财政年度加拿大魁北克省433031对母婴（通过共同的机构代码和医院入院编号关联）中出生性别与前置胎盘之间的关系。计算并比较了有前置胎盘和无前置胎盘妊娠的男女比例。前置胎盘妊娠的出生男女比例（1.19）高于无前置胎盘妊娠（1.04；P<0.02）。通过分层和多因素逻辑回归分析分别考虑母亲年龄、婴儿出生体重和孕周的潜在混杂和/或修正效应后，这一升高的比例仍然存在。我们得出结论，怀有男婴的孕妇前置胎盘风险更高。
