Skjaerven R, Gjessing H K, Bakketeig L S
Section for Medical Statistics and the Medical Birth Registry of Norway, University of Bergen, Bergen, Norway.
Am J Obstet Gynecol. 2000 Sep;183(3):689-96. doi: 10.1067/mob.2000.106590.
This study was undertaken to provide new standards for birth weight according to gestational age through the addition of family data on maternal birth weight and birth weights of previous siblings.
The analyses were based on 1.7 million births in Norway from 1967 through 1998. These population data were arranged into sibships and mother-offspring units through unique personal numbers. We categorized first births by sex and maternal birth weight and second births by sex and birth weight of the older sibling.
Standards for birth weight per gestational age percentiles differed by >1100 g when the birth weight of an older sibling was considered and by almost 700 g when maternal birth weight was considered. The value of these new standards for birth weight according to gestational age was demonstrated through variation in perinatal mortality.
Maternal birth weight and birth weights of previous siblings allow improved predictions of birth weight according to gestational age and should be used for classification of small-for-gestational-age births.
本研究旨在通过纳入母亲出生体重及先前子女出生体重的家庭数据，为根据孕周确定出生体重提供新的标准。
分析基于1967年至1998年挪威的170万例出生数据。这些人口数据通过唯一的个人编号整理成同胞关系和母婴单元。我们按性别和母亲出生体重对头胎进行分类，按性别和年长同胞的出生体重对二胎进行分类。
当考虑年长同胞的出生体重时，按孕周百分位数划分的出生体重标准相差超过1100克；当考虑母亲出生体重时，相差近700克。围产期死亡率的差异证明了这些根据孕周确定出生体重的新标准的价值。
母亲出生体重及先前子女的出生体重有助于更好地根据孕周预测出生体重，应用于小于胎龄儿出生的分类。
