FACTORS ASSOCIATED WITH PREMATURE BIRTHS--MISSOURI FOLLOW-BACK SURVEY

其目的是获得更准确的信息， 低出生体重（VLBW）婴儿，<1500克，比现在可从 美国的重要记录 这一目标将通过以下方式实现： （1）向母亲邮寄或发放问卷 的VLBW婴儿，胎儿死亡的母亲，和母亲的样本 中度LBW婴儿（1500-2499克）和正常出生体重婴儿 （大于或等于2500克），以便获得和验证 产前、围产期和新生儿后期的信息; 2） 对未答复者进行电话跟踪访谈， 不完整的受访者和10%的研究母亲样本， 获取和/或核实调查表上的信息;以及3）制定 从医院和医生处提取信息的程序 记录，包括无法获得或缺失的信息 研究对象的发病率、生活方式和社会经济指标。 此外，还将评估死亡率和随访评价结果。 这一出生队列的出生后第一年的可用数据。 初始 对这些数据的分析侧重于极低出生体重的影响， 和中度低出生体重对一年内认知发育的影响， 母亲对体重增加的态度对营养状况的影响 出生体重结果。 目前正在进一步研究产前护理的影响（时间和 内容）对怀孕结果、贫困、社会经济和 社会心理因素对早产和分娩及IUGR的影响 怀孕对妊娠结局的影响，以及产前， 产时和新生儿护理对新生儿结局的影响。

The objective is to obtain more accurate information relating to the very low birth weight (VLBW) infant, <1500 grams, than is now available from the United States vital records. This objective will be accomplished by the following: 1) mailing or administering a questionnaire to mothers of VLBW infants, mothers of fetal deaths, and a sample of mothers of moderately LBW infants (1500-2499 grams) and normal birth weight infants (greater than or equal to 2500 grams) in order to obtain and verify information from the prenatal, perinatal, and post-neonatal periods; 2) conducting telephone follow-up interviews on non-respondents and incomplete respondents, and a 10 percent sample of study mothers to obtain and/or verify information on the questionnaires; and 3) developing procedures for abstracting information from hospital and physician records, including otherwise unavailable or missing information on morbidity, lifestyle, and socioeconomic indicators of the study subjects. In addition, mortality and results of follow-up evaluations will be available through the first year of life for this birth cohort. Initial analyses of these data focused on the impact of very low birth weight and moderate low birth weight on cognitive development at one year, and the effect of maternal attitudes to weight gain on nutritional status and birth weight outcome. Further work is being done on the impact of prenatal care (timing and content) on pregnancy outcome, the impact of poverty, socioeconomic and psychosocial factors on preterm labor and delivery and IUGR, the impact of pregnancy wantedness on pregnancy outcome, and the impact of prenatal, intrapartum and neonatal care on neonatal outcome.