November 14, 2025Open Access

Inferential Z-Test Validation of Dual Structural Bias in Cancer Risk Assessment within Large COVID-19 Vaccine Cohorts

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The assessment identified a critical selection bias inflating cancer risk in vaccinated individuals, disrupting true incidence rates.
Statistical analysis showcased a Z-score of -252.15 for demographic biases, correlating with severe cancer risk misrepresentation.
Assessing the cohort's alignment with national cancer rates unveiled a significant -45% baseline cancer risk deficit for unvaccinated groups.
Findings underscore the necessity for rigorous inferential validation to ensure accuracy in cancer risk assessments within large databases.

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Analysis reveals significant cancer risk assessment bias in vaccinated cohorts, suggesting verification is essential.

Roccetti Marco (2025) studied this question.

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