Table 3.
Polyp diagnosis on HDWL and BLI according to level of confidence in prediction.
| Variable | HDWL % (95% CI) | BLI % (95% CI) | Odds Ratioa (95% CI) | p value |
|---|---|---|---|---|
| High confidence | ||||
| Sensitivity | 81 (73, 89) | 85 (78, 90) | 2.32 (0.9, 5.83) | 0.07 |
| Specificity | 97 (93, 98) | 97 (94, 99) | 0.95 (0.19, 4.70) | 0.95 |
| PPV | 96 (92, 100) | 97 (92, 98) | 1.00 (0.23, 4.32) | 0.99 |
| NPV | 85 (76, 89) | 85 (79, 90) | 1.02 (0.54, 1.96) | 0.95 |
| Accuracy | 89 (86, 94) | 90 (87, 94) | 1.84 (0.84, 4.05) | 0.13 |
| Low confidence | ||||
| Sensitivity | 64 (56, 73) | 65 (55, 79) | 1.15 (0.57, 2.34) | 0.70 |
| Specificity | 97 (95, 100) | 93 (84, 97) | 0.40 (0.08, 1.98) | 0.26 |
| PPV | 96 (88, 99) | 90 (81, 98) | 0.31 (0.07, 1.38) | 0.13 |
| NPV | 71 (63, 78) | 75 (66, 83) | 1.27 (0.71, 2.23) | 0.42 |
| Accuracy | 80 (74, 84) | 80 (76, 87) | 1.11 (0.56, 5.72) | 0.61 |
BLI: Blue Light Imaging; CI: confidence interval; HDWL: high-definition white light; NPV: negative predictive value; PPV: positive predictive value.