Spearman rank coefficients (rs) between the quantitative fecal Hb measurements across all 36 two-test comparisons ranged from 0.81 to 0.98 (median: 0.89) for CRC (n = 16), from 0.60 to 0.95 (median: 0.78) for AA (n = 200), from 0.22 to 0.81 (median: 0.44) for participants without CRC and AA (n = 300), and from 0.51 to 0.90 (median: 0.66) for all study participants of screening colonoscopy (n = 516) (Table 3). The gene discussed is GSTM1; the disease is colorectal carcinoma.