%0 Journal Article
%T ItchApp£¿: An App-based eDiary for Assessment of Chronic Pruritus in Clinical Trials
%A Athanasios Tsianakas
%A Claudia Riepe
%A Claudia Zeidler
%A David Pihan
%A Marvin Gernart
%A Nani Osada
%A Sonja St£¿nder
%J -
%@ 1651-2057
%D 2017
%R 10.2340/00015555-2602
%X Performing a reliable assessment of chronic pruritus remains a challenge. Electronic diaries are often used, but many of the scales have not been validated. ItchApp£¿ was developed for Android smartphones in order to address this lack. A total of 40 subjects with chronic pruritus completed questionnaires both on paper and with ItchApp£¿ (verbal rating scale, numerical rating scale, dynamic pruritus score) in order to validate the software application. Strong correlations were found for test¨Cretest reliability (intraclass correlation coefficient: 0.865¨C0.977) and convergent validity (Spearman¡¯s r: 0.442¨C0.924). A feasibility questionnaire for ItchApp£¿ revealed a high level of user friendliness and compliance. This was confirmed in a randomized controlled trial with 68 subjects, for which the clinically important difference in the numerical rating scale values for ItchApp£¿ was calculated (2.61 points). In summary, ItchApp£¿ is a recently developed eDiary that can provide experts with a reliable evaluation of patients with chronic pruritus. It will be made available for future clinical trials.
%U http://www.medicaljournals.se/acta/content/abstract/10.2340/00015555-2602