Symptom combinations predicting all pathology.
| Symptoms | Numbers | Predictive value | Likelihood ratio (95% CI) | Sensitivity | Specificity |
|---|---|---|---|---|---|
| Bleeding and CIBH | 24/119 | 20.2 | 1.724 (1.321 to 2.250) | 71 | 59 |
| Bleeding and no perianal symptoms | 20/63 | 31.7 | 2.686 (1.858 to 3.882) | 59 | 78 |
| Dark blood | 6/31 | 19.4 | 1.608 (0.718 to 3.603) | 19 | 87 |
| Bright blood | 26/199 | 13.1 | |||
CIBH = change in bowel habit.