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Maternal body mass index and risk of obstetric, maternal and neonatal outcomes: A cohort study of nulliparous women with spontaneous onset of labor.

孕产妇体重指数与产科、孕产妇和新生儿结局的风险: 自然分娩未产妇的队列研究。

  • 影响因子:2.21
  • DOI:10.1111/aogs.14017
  • 作者列表:"Dalbye R","Gunnes N","Blix E","Zhang J","Eggebø T","Nistov Tokheim L","Øian P","Bernitz S
  • 发表时间:2021-03-01
Abstract

INTRODUCTION:This study investigates associations between maternal body mass index (BMI) early in pregnancy and obstetric interventions, maternal and neonatal outcomes. MATERIAL AND METHODS:This is a cohort study of nulliparous women originally included in a cluster randomized controlled trial carried out at 14 Norwegian obstetric units between 2014 and 2017. The sample included 7189 nulliparous women with a singleton fetus, cephalic presentation and spontaneous onset of labor at term, denoted as group 1 in the Ten-Group Classification System. The women were grouped according to the World Health Organization BMI classifications: underweight (BMI <18.5), normal weight (BMI 18.5-24.9), pre-obesity (BMI 25.0-29.9), obesity class I (BMI 30.0-34.9), and obesity classes II and III (BMI ≥35.0). We used binary logistic regression to estimate crude and adjusted odds ratios (ORs) of the interventions and outcomes, with associated 95% confidence intervals (CIs), comparing women in different BMI groups with women of normal weight. RESULTS:We found an increased risk of intrapartum cesarean section in women of obesity class I and obesity classes II and III, with adjusted OR of 1.70 (95% CI 1.21-2.38) and 2.31 (95% CI 1.41-3.77), respectively. Women in obesity groups had a gradient of risk of epidural analgesia and use of continuous CTG (including STAN), with adjusted OR of 2.39 (95% CI 1.69-3.38) and 3.28 (95% CI 1.97-5.48), respectively. Women in obesity classes II and III had higher risk of amniotomy (adjusted OR = 1.42, 95% CI 1.02-1.96), oxytocin augmentation (adjusted OR = 1.54, 95% CI 1.11-2.15), obstetric anal sphincter injuries (adjusted OR = 2.21, 95% CI 1.01-4.85) and postpartum hemorrhage ≥1000 mL (adjusted OR = 2.20, 95% CI 1.29-3.78). We found a reduced likelihood of spontaneous vaginal delivery for pre-obese women (adjusted OR = 0.85, 95% CI 0.74-0.97) and no associations between maternal BMI and neonatal outcomes. CONCLUSIONS:Obese women in Ten-Group Classification System group 1 had increased risks of obstetric interventions and maternal complications. There was a gradient of risk for intrapartum cesarean section, with the highest risk for women in obesity classes II and III. No associations between maternal BMI and neonatal outcomes were observed.

摘要

引言: 本研究调查了妊娠早期产妇体重指数 (BMI) 与产科干预措施、产妇和新生儿结局之间的关系。 材料和方法: 这是一项队列研究,最初纳入2014年至2017年间在14个挪威产科单位进行的整群随机对照试验。该样本包括7189名具有单胎胎儿、头位表现和足月自然分娩开始的未产妇,在10组分类系统中表示为组1。这些女性根据世界卫生组织BMI分类进行分组: 体重过轻 (BMI <18.5),体重正常 (BMI 18.5-24.9),肥胖前期 (BMI 25.0-29.9),肥胖I级 (BMI 30.0-34.9),和II和III级肥胖 (BMI ≥ 35.0)。我们使用二元逻辑回归来估计干预和结局的粗比值比和校正比值比 (ORs),以及相关的95% 置信区间 (ci),比较不同BMI组的女性与正常体重的女性。 结果: 我们发现肥胖I级和肥胖II级和III级妇女产时剖宫产风险增加,调整后的OR分别为1.70 (95% CI 1.21-2.38) 和2.31 (95% CI 1.41-3.77)。肥胖组女性的硬膜外镇痛和使用连续CTG (包括STAN) 的风险梯度,调整后的OR分别为2.39 (95% CI 1.69-3.38) 和3.28 (95% CI 1.97-5.48)。肥胖 ⅱ 级和 ⅲ 级的女性患羊膜切开术 (校正后OR = 1.42,95% CI 1.02-1.96) 、催产素强化 (校正后OR = 1.54,95% CI 1.11-2.15) 、产科肛门括约肌损伤 (校正后OR = 2.21,95% CI 1.01-4.85) 的风险较高和产后出血 ≥ 1000 mL (调整OR = 2.20,95% CI 1.29-3.78)。我们发现肥胖前期妇女自然阴道分娩的可能性降低 (校正后OR = 0.85,95% CI 0.74-0.97),母亲BMI与新生儿结局之间无关联。 结论: 10组分类系统第1组的肥胖妇女增加了产科干预和产妇并发症的风险。产时剖宫产的风险呈梯度分布,II级和III级肥胖女性的风险最高.没有观察到母亲BMI和新生儿结局之间的关联。

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