Table 2.
Polyp diagnosis using HDWL and BLI in experienced and trainee groups.
| Variable | HDWL % (95% CI) | BLI % (95% CI) | Odds ratioa (95% CI) | p value |
|---|---|---|---|---|
| Experienced group | ||||
| Sensitivity | 69 (60, 77) | 79 (69, 85) | 2.52 (1.14, 5.59) | 0.02 |
| Specificity | 97 (92, 99) | 95 (90, 99) | 0.43 (0.10, 1.99) | 0.28 |
| PPV | 96 (93, 100) | 94 (90, 98) | 0.58 (0.14, 2.38) | 0.45 |
| NPV | 75 (69, 83) | 81 (73, 88) | 1.46 (0.81, 2.61) | 0.21 |
| Accuracy | 83 (78, 87) | 87 (82, 91) | 1.70 (0.86, 3.38) | 0.13 |
| High confidence | 52 (45, 58) | 71 (65, 77) | 2.80 (1.77, 4.43) | <0.001 |
| Trainee group | ||||
| Sensitivity | 75 (67, 82) | 79 (70, 85) | 1.43 (0.68, 3.02) | 0.35 |
| Specificity | 97 (93, 98) | 96 (93, 99) | 0.72 (0.15, 3.56) | 0.69 |
| PPV | 97 (91, 99) | 96 (89, 98) | 0.79 (0.17, 3.65) | 0.77 |
| NPV | 79 (72, 87) | 82 (74, 88) | 1.20 (0.65, 2.19) | 0.56 |
| Accuracy | 86 (81, 91) | 88 (83, 92) | 1.26 (0.65, 2.48) | 0.49 |
| High confidence | 40 (35, 48) | 67 (60, 72) | 2.95 (2.01, 4.33) | <0.001 |
| All | ||||
| Sensitivity | 72 (64, 77) | 79 (72, 84) | 1.87 (1.09, 3.20) | 0.02 |
| Specificity | 97 (94, 99) | 95 (92, 98) | 0.55 (0.19, 1.64) | 0.29 |
| PPV | 96 (92, 98) | 95 (91, 97) | 0.66 (0.24, 1.86) | 0.43 |
| NPV | 77 (71, 81) | 81 (77, 86) | 1.33 (0.87, 2.02) | 0.18 |
| Accuracy | 84 (81, 88) | 87 (84, 90) | 1.46 (0.91, 2.35) | 0.12 |
| High confidence | 46 (42, 50) | 69 (64, 73) | 2.70 (2.03, 3.58) | <0.001 |
BLI: Blue Light Imaging; CI: confidence interval; HDWL: high-definition white light; NPV: negative predictive value; PPV: positive predictive value.