Fig. 1
ROC curves of the NICE referral criteria, faecal haemoglobin concentration and the COLONPREDICT and FAST Scores for colorectal cancer detection. The area under the curve of the ROC curves are shown. 1Significance of the discriminatory ability differences when compared with the NG12 referral criteria in Chi square homogeneity test. Differences with p < 0.05 are considered statistically significant. ROC, Receiver-operating characteristics; NICE, National Institute for Health and Care Excellence