Comparison of first trimester dating methods for gestational age estimation and their implication on preterm birth classification in a North Indian cohort.

ABSTRACT:

Background

Different formulae have been developed globally to estimate gestational age (GA) by ultrasonography in the first trimester of pregnancy. In this study, we develop an Indian population-specific dating formula and compare its performance with published formulae. Finally, we evaluate the implications of the choice of dating method on preterm birth (PTB) rate. This study's data was from GARBH-Ini, an ongoing pregnancy cohort of North Indian women to study PTB.

Methods

Comparisons between ultrasonography-Hadlock and last menstrual period (LMP) based dating methods were made by studying the distribution of their differences by Bland-Altman analysis. Using data-driven approaches, we removed data outliers more efficiently than by applying clinical parameters. We applied a

SUBMITTER: Vijayram R 

PROVIDER: S-EPMC8088008 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature