TY - JOUR
T1 - Development and Initial Psychometric Properties of Two Itch-Related Measures
T2 - Scratch Intensity and Impact, Sleep-Related Itch and Scratch
AU - Heckman, Carolyn J.
AU - Riley, Mary
AU - Valdes-Rodriguez, Rodrigo
AU - Yosipovitch, Gil
N1 - Funding Information:
Funding sources included Pfizer WI206759, NIH P30CA006927, and NIH P30CA072720. The authors thank Jaqueline Kloss, Jerod Stapleton, Baichen Xu, and Kristen Sorice for their assistance with item development as well as data management and analysis. We have obtained written permission from the copyright owner of the Morisky Medication Adherence Scale-8 and have credited the source in the manuscript. Conceptualization: CJH, RVR, GY; Data Curation: CJH, MR; Formal Analysis: MR; Funding Acquisition: CJH, GY; Investigation: CJH, RVR; Methodology: CJH, GY; Project Administration: CJH; Resources: CJH, GY; Software: MR; Supervision: CJH, GY; Validation: CJH, MR; Visualization: CJH, MR; Writing - Original Draft Preparation: CJH, MR; Writing - Review and Editing: CJH, MR, RVR, GY
Publisher Copyright:
© 2020 The Authors
PY - 2020/11
Y1 - 2020/11
N2 - Self-report measures are needed to better understand the relationships among sleep, itching, scratching, and chronic itch conditions and their associations with disease severity, QOL, health, and functioning. Two scales related to sleep and/or scratch were recently developed and assessed in 137 patients with chronic itch and atopic dermatitis or psoriasis. The Scratch Intensity and Impact Scale consisted of two factors (scratching intensity and impact of scratching on QOL) that accounted for 64.59% of the variance with a total of 13 items, overall Cronbach's α of 0.93, and test–retest reliability of 0.66. The Sleep-Related Itch and Scratch Scale consisted of one factor that accounted for 63.01% of the variance with a total of 16 items, overall Cronbach's α of 0.98, and test–retest reliability of 0.66. Both measures demonstrated significant correlations with each other as well as other itch-related measures and nonsignificant correlations with scales hypothesized to be unrelated. The final measures demonstrated adequate preliminary psychometric characteristics. It is hoped that these scales will be used for future research and clinical purposes to help fill recognized gaps in understanding about sleep, itch, scratching, atopic dermatitis, and psoriasis.
AB - Self-report measures are needed to better understand the relationships among sleep, itching, scratching, and chronic itch conditions and their associations with disease severity, QOL, health, and functioning. Two scales related to sleep and/or scratch were recently developed and assessed in 137 patients with chronic itch and atopic dermatitis or psoriasis. The Scratch Intensity and Impact Scale consisted of two factors (scratching intensity and impact of scratching on QOL) that accounted for 64.59% of the variance with a total of 13 items, overall Cronbach's α of 0.93, and test–retest reliability of 0.66. The Sleep-Related Itch and Scratch Scale consisted of one factor that accounted for 63.01% of the variance with a total of 16 items, overall Cronbach's α of 0.98, and test–retest reliability of 0.66. Both measures demonstrated significant correlations with each other as well as other itch-related measures and nonsignificant correlations with scales hypothesized to be unrelated. The final measures demonstrated adequate preliminary psychometric characteristics. It is hoped that these scales will be used for future research and clinical purposes to help fill recognized gaps in understanding about sleep, itch, scratching, atopic dermatitis, and psoriasis.
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U2 - 10.1016/j.jid.2020.03.961
DO - 10.1016/j.jid.2020.03.961
M3 - Article
C2 - 32298670
AN - SCOPUS:85084242199
VL - 140
SP - 2138-2145.e1
JO - Journal of Investigative Dermatology
JF - Journal of Investigative Dermatology
SN - 0022-202X
IS - 11
ER -