Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 201

The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.

Control of Confounding in the Assessment of Medical Technology

GREENLAND, S., NEUTRA, R.·1980·International Journal of Epidemiology

Abstract

Greenland S (Division of Epidemiology, School of Public Health, University of California, Los Angeles, CA 90024, USA) and Neutra R. Control of confounding in the assessment of medical technology. International Journal of Epidemiology 1980, 9: 361–367. Separation of the effects of extraneous variables from the effects of a factor under study (often termed control of confounding) is one of the key prerequisites for validly estimating the magnitude of the study factor's effects. Because of the phenomenon of confounding by indication, confounding of effects of different factors is a common problem in the assessment of medical technology. We give several examples illustrating that the decision of whether a recorded variable is a confounder in a data-set must be decided on the basis of subject-matter knowledge and clinical judgement. There is no alternative to use of such judgement; statistical selection procedures based on significance tests, such as stepwise regression, can be particularly misleading.

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 · 10.1093/ije/9.4.361

Cites

1 of 1 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 1 references

Cited by

See all 201

Metadata

Authors
GREENLAND, S., & NEUTRA, R.
Venue
International Journal of Epidemiology
Published
1980-12-01
Volume
9
Issue
4
Pages
361-367
ISSN
  • 0300-5771 (ISSN-L)
  • 1464-3685
OpenAlex
W2155199182
Cited by
201
References
1
FWCI
1.18
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: Control of Confounding in the Assessment of Medical Technology. https://app.cochat.ai/papers/10.1093/ije/9.4.361
The paper
GREENLAND, S., & NEUTRA, R. (1980). Control of Confounding in the Assessment of Medical Technology. International Journal of Epidemiology. https://doi.org/10.1093/ije/9.4.361

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.