Saraiya M, Berg C J, Shulman H, Green C A, Atrash H K
Epidemic Intelligence Service, Epidemiology Program Office, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA.
Am J Epidemiol. 1999 Jun 1;149(11):1025-9. doi: 10.1093/oxfordjournals.aje.a009747.
The authors estimated the number of clinically recognized pregnancies that occurred annually from 1981 to 1991 in the United States by type of outcome and by race. Estimates of the numbers of livebirths, induced abortions, ectopic pregnancies, and fetal deaths were obtained by using data from the Centers for Disease Control and Prevention in Atlanta, Georgia. The number of spontaneous abortions was estimated by using previously published, age-specific rates. More than 67 million pregnancies occurred during the study period. Overall, 62.5% of these pregnancies resulted in livebirths, 21.9% in legal induced abortions, 13.8% in spontaneous abortions, 1.3% in ectopic pregnancies, and 0.5% in fetal deaths. These data can be used to provide denominators for the calculation of a variety of pregnancy outcome-specific rates.
作者按结局类型和种族估算了1981年至1991年美国每年临床上确认的妊娠数量。活产、人工流产、宫外孕和胎儿死亡数量的估算数据来自佐治亚州亚特兰大市疾病控制与预防中心。自然流产数量是根据先前公布的特定年龄发病率估算得出。研究期间发生了超过6700万次妊娠。总体而言，这些妊娠中有62.5%为活产，21.9%为合法人工流产，13.8%为自然流产，1.3%为宫外孕，0.5%为胎儿死亡。这些数据可用于提供计算各种特定妊娠结局发生率的分母。
