ArticleFrontiers in public health2026
Psychometric validation of the Chinese version of the Scratch Intensity and Impact Scale (SIIS) in patients with chronic pruritus.
Article in Frontiers in public health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Chronic pruritus poses a substantial burden on patients, leading to physical discomfort, emotional distress, and psychosocial dysfunction. The Scratch Intensity and Impact Scale (SIIS) is a patient-reported outcome (PRO) measure designed to assess both scratching intensity and its effects on health-related quality of life (HRQoL). However, its psychometric properties have not been validated in a Chinese population. This study aimed to culturally adapt and psychometrically validate the SIIS for Chinese patients with chronic pruritus. Methods: The original SIIS was translated into Chinese following a standardized forward-backward translation procedure. In a cross-sectional study, 358 adult patients with chronic pruritus were recruited from Northeast China. Construct validity was assessed by randomly splitting the sample for exploratory factor analysis (EFA; Results: The 13-item Chinese version of the SIIS exhibited a stable two-factor structure, explaining 84.378% of the total variance. Sampling adequacy was confirmed (KMO = 0.948), and Bartlett's test indicated suitability for factor analysis (χ Conclusion: The Chinese version of the SIIS demonstrates strong psychometric properties, confirming its reliability and validity as a PRO instrument for evaluating scratching intensity and HRQoL impact. In this population, it shows promise as a PRO instrument for adult patients with chronic pruritus due to AD or psoriasis in dermatology settings, pending further validation in broader populations.
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