Symptoms | Numbers | Predictive value | Likelihood ratio (95% CI) | Sensitivity | Specificity |
---|---|---|---|---|---|
Bleeding and CIBH | 8/119 | 6.7 | 1.056 (0.626 to 1.781) | 47 | 55 |
Bleeding and no CIBH | 9/147 | 6.1 | |||
Bleeding and CIBH (loose +/− frequent) | 6/83 | 7.2 | 1.081 (0.711 to 1.643) | 75 | 31 |
Bleeding and CIBH (hard +/− infrequent) | 2/36 | 5.6 | |||
Bleeding and no perianal symptoms | 7/63 | 11.1 | 1.831 (0.992 to 3.380) | 41 | 78 |
Bleeding and perianal symptoms | 10/203 | 4.9 | |||
Bleeding, CIBH and abdominal pain | 4/67 | 6 | 0.881 (0.432 to 1.795) | 50 | 43 |
Bleeding, CIBH and no abdominal pain | 4/52 | 7.7 | |||
Dark blood | 2/31 | 6.5 | 0.864 (0.225 to 3.317) | 12 | 86 |
Bright blood | 15/199 | 7.5 |
Total polyps in study: 27/319, 8.5%. Diagnostic yield for polyps in patients sigmoidoscoped: 27/219, 12.3% [95% CI = 8.2 to 17.4]). Diagnostic yield of significant polyps in patients sigmoidoscoped: 17/219, 7.8% [95% CI = 4.6 to 12.1]). CIBH = change in bowel habit.