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NEJM:美国女性意外怀孕率下降

2016-03-07 MedSci MedSci原创

2001-2008年美国女性意外怀孕概率轻度上升, 高于很多其他工业化国家。2008年后就没有国内趋势的报道了。我们根据2008-2011年妇女和女孩的怀孕意向和这些妊娠结局计算妊娠率。数据来源:家庭增长国家调查委员会统计的妊娠意向,国家对堕胎的调查,国家健康统计中心的出生率,全国人口普查的人工流产统计;使用家庭增长国家调查的数据估计流产率。结果:2011年少于一半(45%)的妊娠为非计划性,相比

2001-2008年美国女性意外怀孕概率轻度上升, 高于很多其他工业化国家。2008年后缺少国内趋势报道。

我们根据2008-2011年妇女和女孩的怀孕意向和这些妊娠结局计算妊娠率。数据来源:家庭增长国家调查委员会统计的妊娠意向,国家对堕胎的调查,国家健康统计中心的出生率,全国人口普查的人工流产统计;使用家庭增长国家调查的数据估计流产率。

结果:2011年少于一半(45%)的妊娠为非计划性,相比2008年为51%。15-44岁女性的意外妊娠率下降了18%,2008年为54/1000人,2011年为45/1000人。低于联邦贫困线水平和未婚同居的女性意外妊娠率高于国内水平2-3倍。人群亚组的横断面中,差异持续存在,但2008和2011的差距缩小;在年龄15-17岁,未婚同居、收入为联邦贫困线水平的100%和199%、没有高中文凭、和西班牙裔的女性中意外妊娠率降低了超过25%。意外妊娠以流产为结局的概率相持平(2008年为40%,2011年为42%)。在年龄15-44岁的女性中,意外妊娠以流产为结局的发生率从2008年的27/1000人降到了2011年的22/1000人。

结论:经过前一个时期的极小的变化,美国女性意外妊娠的概率在2008到2011年大幅下降,但在贫困女性和未婚同居女性中依然是最常见的。


原始出处:

Lawrence B. Finer, Ph.D., and Mia R. Zolna,Declines in Unintended Pregnancy in the United States, 2008–2011,N Engl J Med 2016; 374:843-85

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