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- W4381094790 abstract "Sleep is often disturbed in patients with prurigo nodularis (PN). To address the lack of validated patient-reported outcome (PRO) measures for quantifying sleep disturbance in PN, we evaluated the Sleep Disturbance Numerical Rating Scale (SD NRS) as a single-item PRO measure for quantifying sleep disturbance in PN. Adults with PN participated in qualitative interviews, which included concept elicitation and cognitive debriefing of the SD NRS. The SD NRS was evaluated psychometrically using data from a phase 2 randomized trial in adults with PN (NCT03181503). Other PRO assessments included the Average Pruritus (AP) NRS, AP Verbal Rating Scale (VRS), peak pruritus (PP) NRS, PP VRS, and Dermatology Life Quality Index (DLQI). Reliability, validity, and responsiveness of the SD NRS were evaluated, and meaningful within-patient change was estimated from qualitative interview responses and quantitative trial data. All interview participants (N = 21) experienced sleep disturbance and most (95%) understood the SD NRS as intended. The SD NRS demonstrated test–retest reliability based on intra-class correlation coefficients for itch-stable participants of 0.87 for the AP VRS and 0.76 for the PP VRS. At baseline, Spearman’s rank-order correlation coefficients were moderate to strong (0.3–0.8) between the SD NRS and the AP NRS, AP VRS, PP NRS, PP VRS, and DLQI. Known-groups validity was demonstrated by higher (worse) SD NRS scores in participants with worse scores on the AP NRS, AP VRS, PP VRS, and DLQI. Improvements in SD NRS scores were greater in participants classified as “improved” versus “worsened/unchanged” on the anchor PROs. A 2- to 4-point decrease on the 11-point SD NRS scale was identified as a meaningful within-patient change. The SD NRS is a well-defined, reliable, and valid PRO measure that can be used in daily practice and clinical trials to capture sleep disturbance in adults with PN. Patients with the skin disease prurigo nodularis often sleep badly because their skin is very itchy in the evening and at night. In assessing the effectiveness of new treatments for prurigo nodularis, it is useful to know whether patients sleep better when taking them. Here, we tested whether the “Sleep Disturbance Numerical Rating Scale” (SD NRS), a tool for measuring sleep, can be used by patients with prurigo nodularis. The SD NRS asks patients to score their sleep loss during the previous night on a scale of 0 (“no sleep loss”) to 10 (“I did not sleep at all”). When we interviewed 21 patients with prurigo nodularis, 19 of them had problems falling asleep and 18 of them woke up every night. Most of the patients found the SD NRS easy to use. To further explore whether the SD NRS is suitable for patients with prurigo nodularis, we also analyzed data from a European clinical study in which patients with prurigo nodularis received nemolizumab, a new treatment being developed for the disease. Patients completed the SD NRS each morning during the clinical study. We found that the SD NRS has the necessary properties to be useful for assessing sleep on a daily basis. We also determined that a 2- to 4-point decrease on the SD NRS scale would represent a meaningful improvement in sleep for patients with prurigo nodularis. We conclude that the SD NRS is a useful tool for assessing sleep in prurigo nodularis patients participating in clinical studies." @default.
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- W4381094790 date "2023-06-17" @default.
- W4381094790 modified "2023-10-16" @default.
- W4381094790 title "The Sleep Disturbance Numerical Rating Scale: Content Validity, Psychometric Validation, and Meaningful Within-Patient Change in Prurigo Nodularis" @default.
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- W4381094790 doi "https://doi.org/10.1007/s13555-023-00962-8" @default.
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