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Validity and reliability of itch assessment scales for chronic pruritus in adults: A prospective multicenter study

Authors
 Yong Hyun Jang  ;  Seok Min Kim  ;  Dong Hyuk Eun  ;  Kyung Duck Park  ;  Gyeong-Hun Park  ;  Byung-Soo Kim  ;  Kapsok Li  ;  Chang Ook Park  ;  Hye One Kim  ;  Hei Sung Kim  ;  Min Soo Jang  ;  Eun Jin Doh  ;  Dong Hun Lee  ;  Yang Won Lee  ;  Do Won Kim  ;  Seong-Jin Kim 
Citation
 JOURNAL OF THE AMERICAN ACADEMY OF DERMATOLOGY, Vol.82(1) : 80-86, 2020 
Journal Title
 JOURNAL OF THE AMERICAN ACADEMY OF DERMATOLOGY 
ISSN
 0190-9622 
Issue Date
2020
Keywords
atopic dermatitis ; eczema ; itch ; pruritus ; quality of life ; urticaria
Abstract
BACKGROUND: Several tools can provide a reliable and accurate evaluation of pruritus, including the visual analog scale (VAS), numeric rating scale (NRS), verbal rating scale (VRS), and multidimensional questionnaires such as the Itch Severity Scale (ISS). However, no single method is considered a gold standard. OBJECTIVE: We evaluated the validity and reliability of VAS, NRS, VRS, and ISS and their correlation with a pruritus-specific quality of life instrument, ItchyQoL. METHODS: A total of 419 patients (215 men and 204 women) with chronic pruritus (mean age, 46.58 years) recorded their pruritus intensity on VAS, NRS, VRS, and ISS. Retest reliability was analyzed in a second assessment 3 hours after the initial assessment. All participants answered ItchyQoL. RESULTS: A strong correlation between VAS, NRS, and VRS was found. ISS showed a low intercorrelation validity with these tools. However, ISS was more strongly correlated with ItchyQoL. The retest reliability scores were similar for VAS, NRS, and VRS but lower than the scores obtained for ISS. LIMITATIONS: Limitations include patient heterogeneity and recall bias. CONCLUSION: The assessment of pruritus is challenging because of the subjective symptoms and the multifactorial nature. Therefore, more studies are needed to determine the best strategy to assess itch intensity.
Full Text
https://www.sciencedirect.com/science/article/pii/S0190962219310424
DOI
10.1016/j.jaad.2019.06.043
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Dermatology (피부과학교실) > 1. Journal Papers
Yonsei Authors
Park, Chang Ook(박창욱) ORCID logo https://orcid.org/0000-0003-3856-1201
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/174910
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