Unprovoked scratching Q2 OR scratching neck or shoulder Q3 OR phantom scratching Q5 | Aggravation of scratching during emotional arousal Q6 | Aversion to touch on head, neck or shoulder Q7 | A preferred head posture during sleep Q13 | PPV | NPV | |
---|---|---|---|---|---|---|
X | X | 0.74 | 0.58 | |||
X | X | 0.82 | 0.52 | |||
X | X | 0.82 | 0.52 | |||
X | X | X | 0.77 | 0.53 | ||
X | X | X | 0.88 | 0.51 | ||
X | X | X | 0.91 | 0.49 | ||
X | X | X | X | 0.79 | 0.57 |