Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 369

The DOI matches its Crossref record.

Charts of fetal size: 1. Methodology

Altman, Douglas G., Chitty, Lyn S.·1994·BJOG: An International Journal of Obstetrics & Gynaecology

Abstract

Objectives To discuss the features of study design and analysis which are necessary to derive valid reference centiles for fetal size. To describe a study which meets the stated criteria. Design Prospective study of 663 fetuses. Results The selection of the sample and adequate sample size are of great importance. Prospective collection of data specifically for the purpose of deriving centiles is recommended. It is essential to use statistical methods that take proper account of the increasing variation among fetuses as pregnancy proceeds; such methods are described and illustrated. A study is described which meets the stated criteria for design and analysis, and from which new fetal size centile charts have been derived and are presented in subsequent papers. Conclusions Many published studies containing charts (standards) of fetal size are methodologically flawed. Research design and statistical analysis must adhere to sound principles for fitted centiles of size to be valid and so clinically relevant.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1111/j.1471-0528.1994.tb13006.x

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

See all 369

Metadata

Authors
Altman, D. G., & Chitty, L. S.
Venue
BJOG: An International Journal of Obstetrics & Gynaecology
Publisher
Wiley
Published
1994-01
Volume
101
Issue
1
Pages
29-34
ISSN
  • 0306-5456 (ISSN-L)
  • 1470-0328
  • 1471-0528
OpenAlex
W2013436278
Cited by
369
References
0
FWCI
5.81
Type
journal article
Language
en
Open access
closed

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Charts of fetal size: 1. Methodology. https://app.cochat.ai/papers/10.1111/j.1471-0528.1994.tb13006.x
The paper
Altman, D. G., & Chitty, L. S. (1994). Charts of fetal size: 1. Methodology. BJOG: An International Journal of Obstetrics & Gynaecology. https://doi.org/10.1111/j.1471-0528.1994.tb13006.x

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.