An Comprehensive Index (CIB) with Combination of Consistency in both Case Control and Cohort Study to Determine the Efficacy of a Biomarker

Background: This study aimed to describe biomarkers using the comprehensive index of biomarker (CIB) based on consistency rate in both case control (Youden index, Yen) and cohort study (Crc) to determine the efficacy of a biomarker. Methods: The CIB is the geometric mean of Yen and Crc. The simulated data were generated to observe CIB features of sensitivity, specificity, and receiver operating characteristic (ROC) analysis for biomarkersResults: CIB was found to be related to the CRC values ROC analysis. The higher Spe could indicate better diagnostic power and the higher Sen could indicate better joint action for biomarkers with the same Yen. Although Yen is the common index used to evaluate the effectiveness of a biomarker, unfortunately, the Yen value was significantly larger than CIB value under the moderate Spe, showing overestimation.Conclusion: The CIB with combination of consistency in both case control and cohort study could be more reasonable. The CIB could provide a better understanding of the power of a biomarker and would be better at evaluating biomarkers from new systems or concepts.