The Urticaria Severity Score (USS) is a new chronic urticaria-specific questionnaire that has 12 questions and 7 response options per question.
The USS was pilot-tested in 28 patients with symptomatic chronic urticaria. A modified version was tested in 80 patients and compared with the validated Dermatology Life Quality Index (DLQI).
There was a positive correlation between the USS and DLQI at baseline (r = 0.64) and follow-up (r = 0.69).
The USS was more sensitive in detecting symptom improvement than the DLQI.
The study authors concluded that the USS is a valid and reliable instrument for monitoring urticaria severity. The USS is more sensitive than the DLQI for quantifying urticaria severity.
The Urticaria Severity Score: a sensitive questionnaire/index for monitoring response to therapy in patients with chronic urticaria. Jariwala SP, Moday H, de Asis ML, Fodeman J, Hudes G, de Vos G, Rosenstreich D. Ann Allergy Asthma Immunol. 2009 Jun;102(6):475-82.
Image source: Urticaria, Wikipedia, public domain.