Diagnostic value of DSNRB with the cutoff value for positive result set at 70%
| Estimate | All Patients | Patients Without Two Findings* on Spot Radiographs |
|---|---|---|
| Sensitivity | 57% (27/47) | 71% (25/35) |
| (42, 72)† | (54, 85)† | |
| Specificity | 86% (50/58) | 91% (43/47) |
| (75, 94)† | (80, 98)† | |
| Accuracy | 73% (77/105) | 83% (68/82) |
| (64, 81)† | (73, 90)† | |
| Positive predictive value | 77% (27/35) | 86% (25/29) |
| (60, 90)† | (68, 96)† | |
| Negative predictive value | 71% (50/70) | 81% (43/53) |
| (59, 82)† | (68, 91)† |
* Two findings indicate inadequate blocks (including insufficient infiltration, insufficient passage, and intraepineural injection) and overflow.
† Shown in parentheses are 95% confidence intervals.