Threshold Values for Optimal Accuracy, with Associated Values for Sensitivity, Specificity, and Predictive Values
| Gastric retention | Sensitivity | Specificity | Positive predictive value | Negative predictive value | Accuracy |
|---|---|---|---|---|---|
| >91% at 1 h | 29 | 97 | 76 | 79 | 79 |
| >52% at 2 h | 80 | 89 | 71 | 93 | 87 |
| >30% at 3 h | 82 | 95 | 84 | 94 | 91 |
Data are percentages.