Are reported preterm birth rates reliable? An analysis of interhospital differences in the calculation of the weeks of gestation at delivery and preterm birth rate

被引：15
|
作者：
Balchin, I
Whittaker, JC
Steer, PJ
Lamont, RF
机构：
[1] Univ London Imperial Coll Sci & Technol, Fac Med, Chelsea & Westminster Hosp, Acad Dept Obstet & Gynaecol, London SW10 9NH, England
[2] Univ London Imperial Coll Sci Technol & Med, Fac Med, Dept Epidemiol & Publ Hlth, London, England
[3] Northwick Pk Hosp & Clin Res Ctr, Dept Obstet & Gynaecol, Harrow, Middx, England
来源：
BJOG-AN INTERNATIONAL JOURNAL OF OBSTETRICS AND GYNAECOLOGY | 2004年 / 111卷 / 02期
关键词：
D O I：
10.1046/j.1471-0528.2003.00026.x
中图分类号：
R71 [妇产科学];
学科分类号：
100211 ;
摘要：
We investigated the possibility of preterm birth misclassification as a determinant of variation in its reported rates. Using a database of 497,105 deliveries from 17 hospitals, the best estimate of gestational age made at delivery and entered into the database at that time was recalculated from the menstrual dates and midtrimester ultrasound scan. The recalculated completed weeks of gestation at delivery was compared with that made at birth. Calculation of estimated gestational age varied between hospitals due to inconsistencies in 'rounding' and 'truncating' the weeks of gestation at delivery. This resulted in preterm birth misclassification rates of up to 10.1%.
引用
收藏
页码：160 / 163
页数：4
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