Carcinoma embryonic antigen

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Within-participant biological variation

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Carcinoma embryonic antigen increases within-participant biological variation in humans (11.3% (95% CI: 10.2%-12.5%) vs 6.4% (95% CI: 6.0%-6.7%)).
“CEA had higher CVI (11.3%, 95% confidence interval [CI]: 10.2%-12.5%) than European data (6.4%, 95% CI: 6.0%-6.7%).”
Humanshealthybloodn = 45
Monthly Biological Variation of Five Lung Cancer Markers in Healthy Older Individuals: Evidence from Combined Prospective Cohort and Real-World Data Analyses
Annals of laboratory medicineFeb 12, 2026

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