‘Diagnostic yield’ dependent on age and the YFCCP giving a ‘number needed to test’ (NNT) for a positive diagnosis of OCD
| Referral pathway | Diagnostic yield expressed as a percentage based on use or non-use of the YFCCP (absolute numbers) | NNT | ||||
| 18-29 years | 30-39 years | 40-49 years | 50-59 years | Total | ||
| YFCCP | 32.9% (78/237) | 33.0% (82/248) | 22.9% (61/266) | 18.5% (53/287) | 26.4% (274/1038) | 3.8 |
| Non-YFCCP | 20.1% (143/709) | 19.2% (193/1003) | 12.7% (237/1864) | 12.3% (225/1828) | 14.8% (798/5404) | 6.8 |
OCD, organic colonic disease; YFCCP, York faecal calprotectin care pathway.