Table 5.
Optimal Thresholds for T-Scores and their Sensitivity and Specificity for Item Banks as Predictors of Itch Severity
| Item bank 1 | Item bank 2 | Item bank 3 | Item bank 4 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
||||||||||||
| Average itch | Threshold | Sensitivity | Specificity | Threshold | Sensitivity | Specificity | Threshold | Sensitivity | Specificity | Threshold | Sensitivity | Specificity |
|
| ||||||||||||
| Mild vs. no itch | 46.4 | 52.2% | 100% | 44.8 | 56.1% | 75.0% | 48.5 | 58.0% | 100% | 42.2 | 36.3% | 100% |
| Moderate vs. mild | 50.5 | 58.5% | 67.5% | 49.7 | 70.7% | 73.2% | 49.8 | 72.8% | 65.6% | 49.7 | 67.1% | 71.3% |
| Severe vs. moderate | 56.5 | 66.2% | 69.9% | 56.9 | 69.1% | 72.0% | 57.9 | 63.2% | 80.5% | 58.1 | 61.8% | 77.6% |
| Very severe vs. severe | 62.7 | 61.4% | 70.6% | 65.0 | 59.6% | 75.7% | 65.3 | 56.1% | 80.9% | 63.0 | 54.4% | 71.3% |