Summary results for York Faecal Calprotectin Care Pathway (YFCCP) compared with non-FC testing pathways (these data assume 100% compliance with the Pathway)
| Comparator | YFCCP | No FC | Incremental | NNT |
| Tibble et al 19 | ||||
| Total costs (£) | 311 159 | 421 642 | −110 483 | |
| Correctly diagnosed IBS cases | 845 | 671 | 175 | |
| Correctly diagnosed IBD cases | 76 | 28 | 47 | |
| Unnecessary colonoscopies | 74 | 248 | −175 | 5.7 |
| Outpatient appointments | 218 | 379 | −162 | 6.2 |
| Waugh et al 3 | ||||
| Total costs (£) | 311 159 | 378 881 | −67 723 | |
| Correctly diagnosed IBS cases | 845 | 726 | 119 | |
| Correctly diagnosed IBD cases | 76 | 81 | −5 | |
| Unnecessary colonoscopies | 74 | 193 | −119 | 8.4 |
| Outpatient appointments | 218 | 328 | −111 | 9.0 |
IBD, inflammatory bowel disease; IBS, irritable bowel syndrome; NNT, numbers needed to treat.