Fig. 2

Receiver operating characteristic curves for diagnosing SCD for the basic diagnostic model, and the POC FIT and the calprotectin POC test extended models. FIT faecal immunochemical test for haemoglobin; POC point-of-care; SCD significant colorectal disease. Areas under the curve (before optimism-correction): basic model 0.741 (95Ā % CI, 0.694ā0.789); calprotectin POC test extended 0.763 (95Ā % CI, 0.718ā0.809); POC FIT extended 0.831 (95Ā % CI, 0.791ā0.872); Both faecal POC tests extended 0.837 (95Ā % CI, 0.798ā0.876). Dashed line is reference line