Table 1.
VSE and visual estimation classification (underestimation, correct, overestimation) based on size category per clinically relevant size threshold.
| Threshold (mm) | VSE | VA | Total misclassified VSE versus VA (P value) |
Underestimation VSE versus VA (P value) |
Overestimation VSE versus VA (P value) |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| UE | CC | OE | Total misclassified | UE | CC | OE | Total misclassified | ||||
| 3 (n = 47 VSE) (n = 30 visual) |
7 (15 percent) | 30 (64 percent) | 10 (21 percent) | 17 (36 percent) | 7 (23 percent) | 16 (54 percent) | 7 (23 percent) | 14 (46 percent) | 0.3853 | 0.3772 | 0.8368 |
| 5 (n = 105 VSE) (n = 83 visual) |
14 (13 percent) | 74 (72 percent) | 17 (15 percent) | 31 (28 percent) | 20 (24 percent) | 46 (55 percent) | 17 (21 percent) | 37 (45 percent) | 0.0159 | 0.0511 | 0.2852 |
| 10 (n = 102 VSE) (n = 72 visual) |
19 (19 percent) | 75 (74 percent) | 8 (7 percent) | 27 (26 percent) | 27 (38 percent) | 40 (56 percent) | 5 (6 percent) | 32 (44 percent) | 0.0135 | 0.0055 | 0.7940 |
| 20 (n = 97 VSE) (n = 89 visual) |
21 (22 percent) | 60 (62 percent) | 16 (16 percent) | 37 (38 percent) | 40 (45 percent) | 48 (54 percent) | 1 (1 percent) | 41 (46 percent) | 0.2705 | 0.0009 | 0.0003 |
| Total (n = 491 VSE) (N = 372 Visual) |
69 (14 percent) | 363 (74 percent) | 59 (12 percent) | 128 (26 percent) | 118 (32 percent) | 213 (57 percent) | 41 (11 percent) | 159 (43 percent) | <0.0001 | <0.0001 | 0.6494 |
UE, underestimation; OE, overestimation; CC, correct classification, VSE, virtual scale estimation; VA, visual assessment.