Department of Clinical Epidemiology, Aarhus University and Aarhus University Hospital, Aarhus, Denmark.
Int J Epidemiol. 2023 Dec 25;52(6):1783-1794. doi: 10.1093/ije/dyad130.
Women's reproductive health is associated with cardiovascular morbidity. However, an association of vaginal bleeding (VB) in pregnancy with diabetes and cardiovascular outcomes has scarcely been investigated.
We conducted a population-based cohort study in Denmark (1994-2018). Using nationwide registries, among 903 327 women we identified 1 901 725 pregnancies: 39 265 ended in childbirth and were affected by VB; 1 389 285 ended in childbirth and were unaffected by VB; 333 785 ended in a termination, and 139 390 ended in a miscarriage. The outcomes were diabetes types 1 and 2, hypertension, ischaemic heart disease including myocardial infarction, atrial fibrillation or flutter, heart failure and ischaemic and haemorrhagic stroke. We computed incidence rates and hazard ratios (HRs) with 95% confidence intervals (CIs) adjusted for age, calendar year of pregnancy end, morbidities and reproductive and socioeconomic factors, using inverse probability of treatment-weighted Cox proportional hazards regression.
In analyses of VB-affected vs VB-unaffected pregnancies, aHRs were 1.15 (1.03-1.28) for diabetes type 1, 1.19 (1.13-1.26) for diabetes type 2, 1.19 (1.14-1.25) for hypertension, 1.26 (1.16-1.37) for ischaemic heart disease, 1.21 (1.03-1.42) for myocardial infarction, 1.32 (1.14-1.51) for atrial fibrillation or flutter and 1.23 (0.99-1.52) for heart failure. aHRs were 1.41 (1.26-1.57) and 1.46 (1.23-1.72) for ischaemic and haemorrhagic stroke, respectively. When contrasting VB-affected pregnancies with terminations, aHRs were up to 1.3-fold increased for diabetes and hypertension; however, when contrasting VB-affected pregnancies with miscarriages, estimates were below or close to the null value.
Women's risks of diabetes and cardiovascular outcomes later in life were increased following VB-affected vs VB-unaffected pregnancy or termination, but not following VB-affected pregnancy vs miscarriage.
女性的生殖健康与心血管发病率有关。然而,妊娠期间阴道出血(VB)与糖尿病和心血管结局的关系鲜有研究。
我们在丹麦进行了一项基于人群的队列研究(1994-2018 年)。利用全国性登记处,我们在 903327 名女性中确定了 1901725 例妊娠:39265 例分娩并伴有 VB;1389285 例分娩且无 VB;333785 例妊娠终止且伴有 VB;139390 例妊娠终止且无 VB。结局为 1 型和 2 型糖尿病、高血压、包括心肌梗死在内的缺血性心脏病、心房颤动或扑动、心力衰竭以及缺血性和出血性中风。我们使用逆概率治疗加权 Cox 比例风险回归,根据年龄、妊娠结束的日历年份、合并症以及生殖和社会经济因素,计算发病率和危险比(HRs)及其 95%置信区间(CI)。
在 VB 影响与 VB 无影响妊娠的分析中,1 型糖尿病的校正 HR 为 1.15(1.03-1.28),2 型糖尿病为 1.19(1.13-1.26),高血压为 1.19(1.14-1.25),缺血性心脏病为 1.26(1.16-1.37),心肌梗死为 1.21(1.03-1.42),心房颤动或扑动为 1.32(1.14-1.51),心力衰竭为 1.23(0.99-1.52)。缺血性和出血性中风的校正 HR 分别为 1.41(1.26-1.57)和 1.46(1.23-1.72)。与足月产相比,VB 影响妊娠与妊娠终止的校正 HR 最高增加了 1.3 倍;然而,与流产相比,VB 影响妊娠的估计值低于或接近零值。
与 VB 无影响妊娠或妊娠终止相比,VB 影响妊娠后女性患糖尿病和心血管结局的风险增加;然而,与流产相比,VB 影响妊娠后风险并未增加。