Diagnostic characteristics for RAC presence as a predictor of Helicobacter pylori negative status (either naïve or eradicated)
| N | Sensitivity % (95% CI) | Specificity % (95% CI) | Positive predictive value % (95% CI) | Negative Predictive Value % (95% CI) | Accuracy % (95% CI) | |
| RAC (all patients) | 153 | 78.4 (70.2 to 85.3) | 64.3 (44.1 to 81.4) | 90.7 (85.5 to 94.2) | 40.0 (30.2 to 50.7) | 75.8 (68.2 to 82.4) |
| RAC (patients aged <50 years) | 60 | 85.1 (71.7 to 93.8) | 76.9 (46.2 to 95.0) | 93.0 (83.1 to 97.3) | 58.8 (40.4 to 75.1) | 83.3 (71.5 to 91.7) |
| RAC (patients aged <55 years) | 74 | 84.8 (73.0 to 92.8) | 73.3 (44.9 to 92.2) | 92.6 (84.4 to 96.7) | 55.0 (38.4 to 70.6) | 82.4 (71.8 to 90.3) |
| RAC (patients aged <60 years) | 86 | 82.9 (72.0 to 90.8) | 75.0 (47.6 to 92.7) | 93.6 (86.0 to 97.2) | 50.0 (35.7 to 64.3) | 81.4 (71.6 to 89.0) |
Examined using combined WLE and NBI. Results are presented for different age cohorts.
NBI, negative predictive value; RAC, regular arrangement of collecting venules; WLE, white-light endoscopy.