Altman D G, Chitty L S
ICRF Medical Statistics Group, Centre for Statistics in Medicine, Institute of Health Sciences, Oxford, UK.
Ultrasound Obstet Gynecol. 1997 Sep;10(3):174-91. doi: 10.1046/j.1469-0705.1997.10030174.x.
We describe new charts and tables for dating pregnancies derived from data collected in a study designed to enable the construction of these and charts of fetal size. This was a prospective study in which 663 fetuses seen in the routine ultrasound clinic in a London teaching hospital were scanned once only for the purpose of this study. We discuss the statistical methodology in detail and compare the new charts with other published charts. We suggest that the differences seen may be due to variation in study methodology.
我们描述了用于确定妊娠日期的新图表，这些图表源自一项研究收集的数据，该研究旨在构建这些图表以及胎儿大小图表。这是一项前瞻性研究，在伦敦一家教学医院的常规超声诊所对663例胎儿进行了扫描，仅为本研究目的进行了一次扫描。我们详细讨论了统计方法，并将新图表与其他已发表的图表进行了比较。我们认为观察到的差异可能是由于研究方法的不同。
