“…Based on reported studies of SNHG1 and CRC, 39 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 the pretest probability of the sensitivity of SNHG1 testing was set at 0.6 to 0.9, and the pretest probability of specificity was set at 0.714 to 0.9. On the basis of reported studies of CEA mRNA and CRC, 13 , 14 , 18 , 24 , 25 , 26 , 27 , 28 the pretest probability of the sensitivity of CEA testing was set at 0.33 to 0.667, and the pretest probability of specificity was set at 0.697 to 0.864.Based on the reported studies of IFCCs and CRC, 13 , 14 , 18 , 20 , 21 , 24 , 25 , 26 , 27 , 28 the pretest probability of positive rate sensitivity was set at 0.08 to 0.379.…”