A Psychometric Evaluation of the Chinese Version of the 5D Itch Scale in Taiwanese Elderly
Jong-Ni Lin, PhD, RN; Dai-Ling Chiang; Tzu-Ying Chen

Abstract
Purpose: To translate the English version of the 5D itch scale into Chinese and test psychometric properties of the Chinese version of the 5D itch scale (C5D-IS) in a sample of 257 older adults with chronic pruritus lasting 6 weeks in Taiwan. Results: The expert's content validity index was 0.94. Concurrent validity between the C5D-IS and the Chinese version of Pittsburgh Sleep Quality Index was 0.30.Spearman’s rho correlations between subscales were statistically significant (all p < 0.001). Item 3 (direction) had the lowest but item 2 (degree) had the highest correlation to other items. Cronbach’s alpha test of internal consistency was 0.71 for the five domains of the C5D-IS. Conclusion: The C5D-ISis a reliable instrument that can help Chinese-speaking caregivers determine the pruritic symptoms of older adults and assess the effects of the treatment on the symptoms. However, further testing of the reliability of the scale in different population is recommended.

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