The creation of twin centile curves for size

S. Ong; M. N. Lim; Ann Elizabeth Fitzmaurice; Doris Margaret Campbell; A. P. Smith; Norman Smith

doi:10.1111/j.1471-0528.2002.01361.x

The creation of twin centile curves for size

S. Ong, M. N. Lim, Ann Elizabeth Fitzmaurice, Doris Margaret Campbell, A. P. Smith, Norman Smith

Applied Health Sciences

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

Objective To create twin centile charts for size.

Design Retrospective study.

Setting Aberdeen Maternity Hospital.

Methods Ultrasound measurements of abdominal circumference (AC), biparietal diameter (BPD) and femur length (FL) for 1011 twin pregnancies were extracted from a databank. The methodology is based on that described by Altman and Chitty [Br. J. Obstet. Gynaecol. 101 (1994) 29.]; only one measurement from each twin was used, polynomial regression models were fitted separately to the mean and standard deviation (SD) of the ultrasound parameter as functions of gestational age. The centiles were obtained assuming that at each gestation, the measurements had a normal distribution.

Results The growth pattern of AC for twins appear to follow closely that of singletons until 32 weeks. Thereafter, there is a gradual but definite fall off in growth away from singleton standards. The pattern of growth of FL is largely similar to that of singletons. From mid to early third trimester, the BPD of twin babies was larger than that of singletons.

Original language	English
Pages (from-to)	753-758
Number of pages	5
Journal	BJOG-An International Journal of Obstetrics and Gynaecology
Volume	109
Issue number	7
DOIs	https://doi.org/10.1111/j.1471-0528.2002.01361.x
Publication status	Published - 2002

Keywords

FETAL SIZE
DOPPLER VELOCIMETRY
UMBILICAL ARTERY
CEREBRAL-PALSY
CHARTS
PREGNANCIES
GESTATION
TRIPLETS
GROWTH

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10.1111/j.1471-0528.2002.01361.x

Cite this

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title = "The creation of twin centile curves for size",

abstract = "Objective To create twin centile charts for size.Design Retrospective study.Setting Aberdeen Maternity Hospital.Methods Ultrasound measurements of abdominal circumference (AC), biparietal diameter (BPD) and femur length (FL) for 1011 twin pregnancies were extracted from a databank. The methodology is based on that described by Altman and Chitty [Br. J. Obstet. Gynaecol. 101 (1994) 29.]; only one measurement from each twin was used, polynomial regression models were fitted separately to the mean and standard deviation (SD) of the ultrasound parameter as functions of gestational age. The centiles were obtained assuming that at each gestation, the measurements had a normal distribution.Results The growth pattern of AC for twins appear to follow closely that of singletons until 32 weeks. Thereafter, there is a gradual but definite fall off in growth away from singleton standards. The pattern of growth of FL is largely similar to that of singletons. From mid to early third trimester, the BPD of twin babies was larger than that of singletons.",

keywords = "FETAL SIZE, DOPPLER VELOCIMETRY, UMBILICAL ARTERY, CEREBRAL-PALSY, CHARTS, PREGNANCIES, GESTATION, TRIPLETS, GROWTH",

author = "S. Ong and Lim, {M. N.} and Fitzmaurice, {Ann Elizabeth} and Campbell, {Doris Margaret} and Smith, {A. P.} and Norman Smith",

year = "2002",

doi = "10.1111/j.1471-0528.2002.01361.x",

language = "English",

volume = "109",

pages = "753--758",

journal = "BJOG-An International Journal of Obstetrics and Gynaecology",

issn = "1471-0528",

publisher = "John Wiley & Sons, Ltd (10.1111)",

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T1 - The creation of twin centile curves for size

AU - Ong, S.

AU - Lim, M. N.

AU - Fitzmaurice, Ann Elizabeth

AU - Campbell, Doris Margaret

AU - Smith, A. P.

AU - Smith, Norman

PY - 2002

Y1 - 2002

N2 - Objective To create twin centile charts for size.Design Retrospective study.Setting Aberdeen Maternity Hospital.Methods Ultrasound measurements of abdominal circumference (AC), biparietal diameter (BPD) and femur length (FL) for 1011 twin pregnancies were extracted from a databank. The methodology is based on that described by Altman and Chitty [Br. J. Obstet. Gynaecol. 101 (1994) 29.]; only one measurement from each twin was used, polynomial regression models were fitted separately to the mean and standard deviation (SD) of the ultrasound parameter as functions of gestational age. The centiles were obtained assuming that at each gestation, the measurements had a normal distribution.Results The growth pattern of AC for twins appear to follow closely that of singletons until 32 weeks. Thereafter, there is a gradual but definite fall off in growth away from singleton standards. The pattern of growth of FL is largely similar to that of singletons. From mid to early third trimester, the BPD of twin babies was larger than that of singletons.

AB - Objective To create twin centile charts for size.Design Retrospective study.Setting Aberdeen Maternity Hospital.Methods Ultrasound measurements of abdominal circumference (AC), biparietal diameter (BPD) and femur length (FL) for 1011 twin pregnancies were extracted from a databank. The methodology is based on that described by Altman and Chitty [Br. J. Obstet. Gynaecol. 101 (1994) 29.]; only one measurement from each twin was used, polynomial regression models were fitted separately to the mean and standard deviation (SD) of the ultrasound parameter as functions of gestational age. The centiles were obtained assuming that at each gestation, the measurements had a normal distribution.Results The growth pattern of AC for twins appear to follow closely that of singletons until 32 weeks. Thereafter, there is a gradual but definite fall off in growth away from singleton standards. The pattern of growth of FL is largely similar to that of singletons. From mid to early third trimester, the BPD of twin babies was larger than that of singletons.

KW - FETAL SIZE

KW - DOPPLER VELOCIMETRY

KW - UMBILICAL ARTERY

KW - CEREBRAL-PALSY

KW - CHARTS

KW - PREGNANCIES

KW - GESTATION

KW - TRIPLETS

KW - GROWTH

U2 - 10.1111/j.1471-0528.2002.01361.x

DO - 10.1111/j.1471-0528.2002.01361.x

M3 - Article

SN - 1471-0528

VL - 109

SP - 753

EP - 758

JO - BJOG-An International Journal of Obstetrics and Gynaecology

JF - BJOG-An International Journal of Obstetrics and Gynaecology

IS - 7

ER -

The creation of twin centile curves for size

Abstract

Keywords

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