ArticleBreast cancer research and treatment2020
Prediction of contralateral breast cancer: external validation of risk calculators in 20 international cohorts.
Article in Breast cancer research and treatment, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
14 citing papers in PubMed, 1 synthesis or guideline pooled it, 21 citations in OpenAlex.
- Feasibility and Efficacy of Decision Aids to Improve Decision-Making for Contralateral Prophylactic Mastectomy: A Systematic Review.Annals of surgical oncology · 2025Pooled it
- Clinicopathological characteristics and potential impact of previous treatment history in metachronous contralateral breast cancer: Insights from a real-world retrospective study.Oncology letters · 2026Article
- Can DNA Methylation in Peritumoral and Contralateral Breast Tissue Predict Recurrence or Second Breast Cancers?Current issues in molecular biology · 2026Article
- Reproductive factors and risk of contralateral breast cancer by age and hormone receptor status: The California Breast Cancer Survivorship Consortium.International journal of cancer · 2026Article
- Overall and central adiposity and risk of contralateral breast cancer: The California Breast Cancer Survivorship Consortium.International journal of cancer · 2026Article
- Society of Surgical Oncology Breast Disease Site Working Group Statement on Contralateral Mastectomy: Indications, Outcomes, and Risks.Annals of surgical oncology · 2024Review
- Contralateral prophylactic mastectomy for unilateral breast cancer in Chinese female population: a retrospective cohort study.Gland surgery · 2023Article
- Trends in Radiation Dose to the Contralateral Breast During Breast Cancer Radiation Therapy.Radiation research · 2023Article
- EBCC-13 manifesto: Balancing pros and cons for contralateral prophylactic mastectomy.European journal of cancer (Oxford, England : 1990) · 2023Review
- The Contribution of Germline Pathogenic Variants in Breast Cancer Genes to Contralateral Breast Cancer Risk inCancers · 2023Article
- CBCRisk-Black: a personalized contralateral breast cancer risk prediction model for black women.Breast cancer research and treatment · 2022Article
- The risk of contralateral breast cancer: a SEER-based analysis.British journal of cancer · 2021Article
- Breast adipocyte size associates with ipsilateral invasive breast cancer risk after ductal carcinoma in situ.NPJ breast cancer · 2021Article
- Clinical characteristics and the associated risk factors of the development of bilateral breast cancers: A case-control study.Annals of medicine and surgery (2012) · 2020Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
57 authors at 20 institutions in 11 countries.
Funding
Abstract
backgroundThree tools are currently available to predict the risk of contralateral breast cancer (CBC). We aimed to compare the performance of the Manchester formula, CBCrisk, and PredictCBC in patients with invasive breast cancer (BC).
methodsWe analyzed data of 132,756 patients (4682 CBC) from 20 international studies with a median follow-up of 8.8 years. Prediction performance included discrimination, quantified as a time-dependent Area-Under-the-Curve (AUC) at 5 and 10 years after diagnosis of primary BC, and calibration, quantified as the expected-observed (E/O) ratio at 5 and 10 years and the calibration slope.
resultsThe AUC at 10 years was: 0.58 (95% confidence intervals [CI] 0.57-0.59) for CBCrisk; 0.60 (95% CI 0.59-0.61) for the Manchester formula; 0.63 (95% CI 0.59-0.66) and 0.59 (95% CI 0.56-0.62) for PredictCBC-1A (for settings where BRCA1/2 mutation status is available) and PredictCBC-1B (for the general population), respectively. The E/O at 10 years: 0.82 (95% CI 0.51-1.32) for CBCrisk; 1.53 (95% CI 0.63-3.73) for the Manchester formula; 1.28 (95% CI 0.63-2.58) for PredictCBC-1A and 1.35 (95% CI 0.65-2.77) for PredictCBC-1B. The calibration slope was 1.26 (95% CI 1.01-1.50) for CBCrisk; 0.90 (95% CI 0.79-1.02) for PredictCBC-1A; 0.81 (95% CI 0.63-0.99) for PredictCBC-1B, and 0.39 (95% CI 0.34-0.43) for the Manchester formula.
conclusionsCurrent CBC risk prediction tools provide only moderate discrimination and the Manchester formula was poorly calibrated. Better predictors and re-calibration are needed to improve CBC prediction and to identify low- and high-CBC risk patients for clinical decision-making.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.