The DOI matches its Crossref record.
Lack of benefit from semi‐annual screening for cancer of the lung: Follow‐up report of a randomized controlled trial on a population of high‐risk males in czechoslovakia
Abstract
Cigarette‐smoking males (6,364), aged 40–64, were randomized into an intervention group which received 6‐monthly screening by chest X‐ray and sputum cytology, and a control group which received no asymptomatic investigation. After 3 years, both groups entered a follow‐up period during which they received annual chest X‐rays. Lung cancer cases detected by screening were identified at an earlier stage, more often resectable, and had a significantly better survival than “interval” cases diagnosed mainly because of symptoms. Comparison of the 2 groups showed a higher incidence of lung cancer in the intervention group, despite the follow‐up period when both groups received annual examinations. There was no significant difference in mortality between the 2 groups.
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.
Integrity signals
Registry
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.
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
Advances in diagnostic imaging and overestimations of disease prevalence and the benefits of therapy
Black, W. C., & Welch, H. G. (1993) · New England Journal of Medicine · doi:10.1056/nejm199304293281706 · Cited by 547
Metadata
- Authors
- Kubik, A., Parkin, D. M., Khlat, M., Erban, J., Polak, J., & Adamec, M.
- Venue
- International Journal of Cancer
- Publisher
- Wiley
- Published
- 1990-01-15
- Volume
- 45
- Issue
- 1
- Pages
- 26-33
- ISSN
- 0020-7136 (ISSN-L)
- 1097-0215
- OpenAlex
- W2073179893
- Cited by
- 258
- References
- 0
- FWCI
- 6.47
- 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: Lack of benefit from semi‐annual screening for cancer of the lung: Follow‐up report of a randomized controlled trial on a population of high‐risk males in czechoslovakia. https://app.cochat.ai/papers/10.1002/ijc.2910450107
- The paper
- Kubik, A., Parkin, D. M., Khlat, M., Erban, J., Polak, J., & Adamec, M. (1990). Lack of benefit from semi‐annual screening for cancer of the lung: Follow‐up report of a randomized controlled trial on a population of high‐risk males in czechoslovakia. International Journal of Cancer. https://doi.org/10.1002/ijc.2910450107
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.
