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The Arabic Urticaria Activity Score and Chronic Urticaria Quality of Life Questionnaire: validation and correlations
Samah Tawil1,2, Carla Irani3, Riwa Kfoury4
1Drug Information Center, Lebanese Order of Pharmacists, Beirut, Lebanon.
Background:
The international guideline for urticaria recommends the use of the Urticaria Activity Score 7 (UAS7) and the Chronic Urticaria Quality of Life Questionnaire (CU-Q2oL) to assess patients with chronic spontaneous urticaria (CSU) for their disease activity and impact on quality of life, respectively. Over the last decade, both tools have been validated in many different languages but not in Arabic.
Objective:
To validate the Arabic UAS7 and CU-Q2oL in patients with CSU in Lebanon.
Methods:
After a structured translation process of both instruments into Arabic, their construct and known-groups validity as well as internal consistency reliability were tested in a longitudinal prospective study using a cluster sample of 152 Lebanese CSU patients. The study also included a repetitive administration of both instruments in 2-week intervals in 44 patients in order to assess their test-retest reliability.
Results:
Both the Arabic UAS7 and CU-Q2oL demonstrated high internal consistency (Cronbach alpha of 0.95 and 0.82, respectively) and moderate-to-high test-retest reliability (intraclass coefficient of 0.61 and 0.91, respectively). Exploratory factor analysis of the Arabic CU-Q2oL revealed five components that explained 81.8% of the total variance. Significant correlations were found between the Arabic CU-Q2oL and the Dermatology Life Quality Index (DLQI) (r = 0.86) and mild-to-moderate correlations between the Arabic UAS7 and CU-Q2oL (r = 0.52) as well as the DLQI (r = 0.51).
Conclusions:
Our findings demonstrate that the Arabic versions of the UAS7 and the CU-Q2oL are valid and reliable patient-reported outcome measures in patients with CSU in Lebanon.
