Observational studyInternational journal of clinical oncology2026
Impact of medical oncologist certification on survival outcomes in metastatic colorectal cancer: evidence from the SCRUM-Japan MONSTAR-SCREEN Observational Study.
Observational study in International journal of clinical oncology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The trial behind it
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Who cites it
2 citing papers in PubMed.
- Facility-level JSMO specialist availability and reconstructable treatment-process measures in colorectal cancer using C-CAT data.International journal of clinical oncology · 2026Article
- Facility-Level Availability of Japanese Society of Medical Oncology Specialists and Recorded First-Line Treatment-Process Duration in Pancreatic Cancer: A Nationwide Center for Cancer Genomics and Advanced Therapeutics Registry Analysis.Current oncology (Toronto, Ont.) · 2026Article
Corrections and comments
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Authors and funding
13 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundBoard certification in surgical oncology improves cancer outcomes, but the impact of medical oncologist certification on systemic therapy outcomes is unknown. We investigated whether the Japanese Society of Medical Oncology (JSMO) board certification of the enrolling physician was associated with treatment quality and survival.
methodsThis retrospective cohort study used data from the SCRUM-Japan MONSTAR-SCREEN observational study, a nationwide multicenter genomic screening program enrolling patients from 2019 to 2022. Standard treatment implementation rates were compared across cancer types as a secondary outcome. The primary outcome was overall survival (OS) in patients with metastatic colorectal cancer (mCRC) using Kaplan-Meier analysis and Cox proportional hazards regression with sequential adjustment for clinical and molecular covariates.
resultsAmong 2,184 patients, standard treatment rates were comparable between board-certified and non-board-certified groups (97.0% vs. 96.9%). In 358 patients with mCRC, enrollment by a board-certified physician was associated with longer OS (median, 36.5 vs. 30.7 months; hazard ratio (HR): 0.66, 95% CI 0.50-0.87; log-rank p = 0.003) even after adjustment for age, sex, tumor sidedness, region, trial participation, molecular targeted therapy, metastatic organ count (HR, 0.73; 95% CI 0.55-0.97; p = 0.029), and after additional adjustment for RAS and BRAF V600E status (HR, 0.64; 95% CI 0.47-0.88; p = 0.005). Board-certified physicians used molecular targeted therapy more frequently (89.5% vs. 80.4%; p = 0.036).
conclusionsJSMO board certification was independently associated with improved OS in mCRC despite comparable guideline adherence, suggesting that specialist expertise extends beyond treatment selection.
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