Objective:

To investigate the association between color vision deficiency (CVD) and survival outcomes in patients with bladder cancer and colorectal cancer, highlighting the potential clinical implications of the findings.

Approach:

Key Findings:

• Patients with bladder cancer and CVD had lower overall survival compared to matched patients without CVD.
• CVD was associated with a 52% higher 20-year mortality risk in bladder cancer patients.
• No significant survival difference was found among colorectal cancer patients based on CVD status, indicating a need for further investigation.

Interpretation:

The findings suggest that impaired color perception may delay recognition of visible blood in urine, a key symptom of bladder cancer, while colorectal cancer presents with a broader range of symptoms that may prompt earlier evaluation, highlighting the importance of awareness in clinical settings.

Limitations:

• Potential misclassification due to reliance on diagnostic coding.
• Undiagnosed CVD may dilute observed effects by including affected patients in comparison cohorts.
• Lack of cancer staging data prevents confirmation of disease advancement related to CVD.
• Retrospective design limits causal conclusions, necessitating caution in interpretation.

Conclusion:

The study's findings are hypothesis-generating and suggest increased clinical suspicion for bladder cancer in patients with CVD. Future research should explore targeted screening strategies for high-risk patients to improve outcomes.

Sources:

• Nature Health
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