The British journal of dermatology
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Randomized Controlled Trial Multicenter Study
Psychometric properties of the Itch Numeric Rating Scale in patients with moderate-to-severe plaque psoriasis.
Itching is a profoundly distressing symptom for many patients with psoriasis, but it has not been rigorously studied using validated tools for this condition. ⋯ The Itch NRS demonstrated sufficient reliability, validity and responsiveness, and appropriate interpretation standards for evaluating change over time in itch severity among patients with moderate-to-severe plaque psoriasis when validated using clinical trial data for this condition.