Signals of inequity in the care pathway: rural lab diagnosis, systemic therapy delays, and RAS mutation differences in metastatic colorectal cancer - Scorecard - MDSpire
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Signals of inequity in the care pathway: rural lab diagnosis, systemic therapy delays, and RAS mutation differences in metastatic colorectal cancer
Clinical Scorecard: Disparities in the Care Pathway for Metastatic Colorectal Cancer: Rural Diagnostic Challenges, Delays in Systemic Therapy, and Variations in RAS Mutations
At a Glance
Category
Detail
Condition
Metastatic Colorectal Cancer (mCRC)
Key Mechanisms
Biomarker testing for RAS, BRAF, and microsatellite instability (MSI)
Target Population
Patients diagnosed with stage IV colorectal cancer in Saskatchewan
Care Setting
Rural and urban healthcare settings in Saskatchewan
Key Highlights
Rural patients had higher odds of right-sided and rectal tumors.
RAS mutations were more frequently identified in rural patients (11.2% vs. 1.6%).
Delays in chemotherapy initiation were longer for patients diagnosed in rural laboratories (66.5 vs. 55 days).
Overall survival did not significantly differ between rural and urban patients (median 250 vs. 270 days).
Older age and poorer performance status were primary predictors of mortality.
Guideline-Based Recommendations
Diagnosis
Universal mismatch repair (MMR) testing for all CRC patients.
Extended RAS and BRAF testing for metastatic disease.
Management
Biomarker-driven treatment strategies including immune checkpoint inhibition for dMMR tumors.
Monitoring & Follow-up
Risks
Longer delays in systemic therapy initiation linked to rural diagnostic laboratory locations.
Patient & Prescribing Data
Patients diagnosed with stage IV colorectal cancer in Saskatchewan between 2017 and 2022.
Equitable access to first-line systemic therapy observed, but delays in treatment initiation noted for rural patients.
Clinical Best Practices
Timely biomarker testing is essential for treatment selection.
Addressing systemic therapy delays in rural settings is critical for improving patient outcomes.
