Figure 2. Box plot of the relative expression levels of candidate miRNAs in the training cohort (n = 120).

The y axis indicates log₁₀ 2^−△△Ct relative expression of miRNA. Among all the circulating miRNAs selected (n = 30), the expression of 5 miRNAs was significantly higher in CRC than in HC (miR-15b, p = 0.0005; miR-17, p = 0.0007; miR-21, p < 0.0001; miR-26b, p = 0.0001; miR-145, p = 0.0008).