Table 4 Best thresholds for the diagnosis of superior oblique palsy according to SOM ratios between patients and controls, based on surface, area and composite criteria of surface OR area.
Parameters | Cut-off point | Cut-off point | Composite threshold |
|---|---|---|---|
Threshold | Ratio SOM surface* 0.9 | Ratio SOM area 0.8 | Ratio SOM surface < 0.9 or ratio SOM area < 0.8 |
Subject reached value of cut-off point - n (%) | 51 (42.9%) | 41 (34.5%) | 55 (46.2%) |
Subject reached value of cut-off point in paralyzed population - n (%) | 47 (78.3%) | 44 (73.3%) | 47 (78.3%) |
Area under curve (95%CI) | 0.85 [0.77–0.92] | 0.80 [0.72–0.89] | – |
Sensitivity (95%CI) | 0.73 [0.60–0.84] | 0.63 [0.50–0.75) | 0.78 [0.66–0.88] |
Specificity (95%CI) | 0.88 [0.77–0.95] | 0.95 [0.86–0.99) | 0.86 [0.75–0.94] |
Positive predictive value (95%CI) | 0.86 [0.74–0.94] | 0.93 [0.80–0.98) | 0.85 [0.73–0.94] |
Negative predictive value (95%CI) | 0.76 [0.65–0.86] | 0.72 [0.60–0.81] | 0.80 [0.68–0.89] |
Positive likelihood ratio (95%CI) | 6.18 [3.03–12.60] | 12.46 [4.07–38.14] | 5.78 [2.99–11.15] |
Negative likelihood ratio (95%CI) | 0.30 [0.20–0.47] | 0.39 [0.28–0.54] | 0.25 [0.15–0.41] |
