Table 1 Description of the values used in the calculation of ARM indexes

N_Tp

Number of comparisons where the target gene is present

N_{Tp, Xp}

Number of comparisons where both the target gene and gene X are present

N_{Tm, Xm}

Number of comparisons where the target gene and the gene X are both modulated

N_{Tm, Xp}

Number of comparisons where the target gene is modulated and the gene X is present

N_{Tp, Xm}

Number of comparisons where the target gene is present and the gene X is modulated