Kissin Dmitry M, Anderson John E, Kraft Joan Marie, Warner Lee, Jamieson Denise J
Division of Reproductive Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA.
J Adolesc Health. 2008 Oct;43(4):364-71. doi: 10.1016/j.jadohealth.2008.02.013. Epub 2008 May 29.
The majority of births to young women are unintended (either mistimed or unwanted), bearing an increased risk of poor health outcomes for both mother and child. In this analysis, we describe trends of unwanted, mistimed, and intended births reported by all women and specifically by young women in the National Survey of Family Growth (NSFG).
Using data from the 1982, 1988, 1995, and 2002 NSFG surveys, we calculated the proportion of unwanted, mistimed, and intended births by maternal age at birth. For the 1995 and 2002 NSFG surveys, we also assessed birth intentions among 15-24-year-old nulliparous women and the mean number of unwanted births in the past 5 years among all 15-24-year-old women.
The proportion of unintended births decreased between 1988 and 1995 but increased between 1995 and 2002. This recent increase was attributed to the increased proportion of unwanted births reported by women <25 years of age from 10.4% in 1995 to 18.6% in 2002 (p < .01). Between 1995 and 2002, the proportion of 15-24-year-old nulliparous women who intended no future births increased from 8.1% to 10.4% (p < .05), and the mean number of unwanted births per 1000 women aged 15-24 years increased from 25 to 48 (p < .01).
Our analyses suggest an increasing trend in unwanted childbearing among young women between 1995 and 2002. Further research is needed to understand the meaning and causes of increased unwanted childbearing among young women and to identify characteristics of those at risk.
大多数年轻女性生育属于意外怀孕(时机不当或意外怀孕),这会增加母婴健康不良后果的风险。在本分析中,我们描述了在全国家庭成长调查(NSFG)中所有女性,特别是年轻女性报告的意外怀孕、时机不当怀孕和计划内怀孕的趋势。
利用1982年、1988年、1995年和2002年NSFG调查的数据,我们按生育时的母亲年龄计算了意外怀孕、时机不当怀孕和计划内怀孕的比例。对于1995年和2002年的NSFG调查,我们还评估了15至24岁未生育女性的生育意愿,以及所有15至24岁女性在过去5年中意外怀孕生育的平均数量。
意外怀孕比例在1988年至1995年间下降,但在1995年至2002年间上升。近期这一增长归因于25岁以下女性报告的意外怀孕比例从1995年的10.4%增至2002年的18.6%(p < 0.01)。1995年至2002年间,打算未来不再生育的15至24岁未生育女性比例从8.1%增至10.4%(p < 0.05),每1000名15至24岁女性中意外怀孕生育的平均数量从25增至48(p < 0.01)。
我们的分析表明,1995年至2002年间年轻女性意外生育呈上升趋势。需要进一步研究以了解年轻女性意外生育增加的意义和原因,并确定高危人群的特征。