Table 4 Performance of digital rectal examination, fecal calprotectin and abdominal ultrasound for detecting colorectal polyps
Technique | SE, % (95% CI) | SP, % (95% CI) | PPV, % (95% CI) | NPV, % (95% CI) | ACC, % |
|---|---|---|---|---|---|
Digital rectal examination (DRE) | |||||
• Overall | 26.9% (9–44) | 100% | 100% | 63.5% (59–67) | 67.8% |
• Rectum | 77.8% (51–100) | 100% | 100% | 94.2% (86–100) | 95.2% |
Fecal calprotectin (FC) | 100% | 93.9% (72–100) | 92.8% (84–100) | 100% | 96.6% |
Abdominal ultrasound (AUS) | 50% (31–69) | 100% | 100% | 71.7% (59–84) | 77.9% |
Combination of FC and AUS | 86.6% (75–98) | 100% | 100% | 67.4% (54–80) | 74.6% |
Combination of FC and DRE | 33% (16–50) | 100% | 100% | 59.6% (46–73) | 64.4% |
Combination of AUS and DRE | 53.8% (27–81) | 100% | 100% | 88.4% (71–100) | 89.8% |