Table 2.
Comparison of both imaging modalities regarding the primary and the secondary outcomes
| 3D-CBCT sialography | Ultrasonography | Both modalities | |
|---|---|---|---|
| Identification of a lesion (primary outcome) | |||
| Normal examination, n (%) Abnormal examination, n (%) Sensitivity, mean [CI 95%] Specificity, mean [CI 95%] Negative predictive value, mean [CI 95%] Positive predictive value, mean [CI 95%] |
44/157 (28.0) 113/157 (72.0) 0.85 [0.76–0.91] 0.44 [0.33–0.55] 0.70 [0.56–0.82] 0.65 [0.55–0.73] |
71/157 (45.2) 86/157 (54.8) 0.65 [0.55–0.73] 0.70 [0.56–0.82] 0.44 [0.33–0.55] 0.85 [0.76–0.91] |
31/157 (19.7) 73/157 (46.5) |
| Type of lesion (secondary outcome) | |||
| Lithiasis, n (%) Dilatation, n (%) Stenosis, n (%) |
71/88 (80.7) 27/35 (77.1) 19/19 (100.0) |
70/88 (79.6) 20/35 (57.1) 0/19 (0) |
54/88 (62.5) 12/35 (34.3) 19/19 (100.0) |
| Characteristics of the lithiasis | |||
| Number: single / multiple, n (%) Radiopaque / radiolucent, n (%) Location, n (%): Anterior third of main canal Middle third of main canal Posterior third or IG Not specified Sensitivity, mean [CI 95%] Specificity, mean [CI 95%] Negative predictive value, mean [CI 95%] Positive predictive value, mean [CI 95%] |
52 (73.2) / 19 (26.8) 60 (84.5) / 11 (15.5) 14 (19.7) 9 (12.7) 48 (67.6) 0 (0) 0.80 [0.69–0.88] 0.82 [0.67–0.91] 0.88 [0.78–0.94] 0.70 [0.56–0.82] |
56 (80.0) / 14 (20.0) – 3 (4.3) 2 (2.9) 33 (47.1) 32 (45.7) 0.75 [0.63–0.83] 0.67 [0.53–0.79] 0.78 [0.67–0.86] 0.63 [0.49–0.75] |
|
| Characteristics of the dilatations: | |||
| Location, n (%): Anterior third of main canal Middle third of main canal Posterior third or IG Not specified |
1 (3.7) 13 (48.1) 6 (22.2) 7 (25.9) |
0 (0) 6 (30.0) 1 (5.0) 13 (65.0) |
|
| Characteristics of the dilatations: | |||
| Location, n (%): Anterior third of main canal Middle third of main canal Posterior third or IG Not specified |
– – – – |
4 (21.0) 12 (63.2) 3 (15.8) 0 (0) |
|
CI, confidence interval; IG, intraglandular; n, number of patients.