Student or educator? Sign up with your school email and get 6 months of Pro free.
CoChat
Sign Up
Cited by 365

The DOI matches its Crossref record; 12 of the 12 references it cites were found in a registry or an index.

The Reduction in Risk of Ovarian Cancer Associated with Oral-Contraceptive Use

The Cancer and Steroid Hormone Study of the Centers for Disease Control and the National Institute of Child Health and Human Development*·1987·New England Journal of Medicine
DOI 10.1056/nejm198703123161102
Open this paper in CoChat — free account

Abstract

Although several studies have reported that the use of oral contraceptives decreases the risk of ovarian cancer, it is not clear whether the effect varies according to the oral-contraceptive formulation or the histologic type of cancer. To characterize this association more fully, we used data from a case-control study, the Cancer and Steroid Hormone Study. From 1980 to 1982, 546 women 20 to 54 years of age with ovarian cancer were enrolled from eight population-based cancer registries. The controls were 4228 women selected from the same areas. Women who had used oral contraceptives had a risk of epithelial ovarian cancer of 0.6 (95 percent confidence interval, 0.5 to 0.7) as compared with those who had never used them. This protective effect was seen in women who had used oral contraceptives for as little as three to six months, and it continued for 15 years after use ended; it was independent of the specific oral-contraceptive formulation and of the histologic type of epithelial ovarian cancer. (We could not adequately assess the association with nonepithelial ovarian cancers because of an insufficient number of cases.) We conclude that the use of oral contraceptives decreases the risk of epithelial ovarian cancer.

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 · 10.1056/nejm198703123161102

Cites

12 of 12 references verified0 citation errors · 0 not checkable

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

Cites

Show all 12 references

Cited by

See all 365

Metadata

Authors
The Cancer and Steroid Hormone Study of the Centers for Disease Control and the National Institute of Child Health and Human Development*
Venue
New England Journal of Medicine
Publisher
Massachusetts Medical Society
Published
1987-03-12
Volume
316
Issue
11
Pages
650-655
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
DOI
10.1056/nejm198703123161102
OpenAlex
W4240178516
Cited by
365
References
12
FWCI
4.10
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: The Reduction in Risk of Ovarian Cancer Associated with Oral-Contraceptive Use. https://app.cochat.ai/papers/10.1056/nejm198703123161102
The paper
The Cancer and Steroid Hormone Study of the Centers for Disease Control and the National Institute of Child Health and Human Development*. (1987). The Reduction in Risk of Ovarian Cancer Associated with Oral-Contraceptive Use. New England Journal of Medicine. https://doi.org/10.1056/nejm198703123161102

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.