Severity of disease, rather than xerosis, correlates with pruritus in patients with atopic dermatitis

Authors



Satoshi Takeuchi, MD Department of Dermatology Graduate School of Medical Sciences Kyushu University Maidashi 3-1-1 Higashi-ku Fukuoka 812-8582 Japan E-mail: takeuchs@dermatol.med.kyushu-u.ac.jp

Abstract

Background  Atopic dermatitis (AD) is a chronic, relapsing skin disease characterized by xerosis and pruritus. As pruritus is an unpleasant sensation and the associated scratching aggravates the skin eruption considerably, it is important to control this symptom when treating AD. Dry skin is generally considered to be a potential cause of pruritus in xerotic skin diseases, but a clear correlation between pruritus and atopic xerosis has not been demonstrated.

Aim  To examine the contribution of atopic xerosis to the development of pruritus in AD.

Methods  Twenty-two patients with AD (12 males and 10 females; mean age, 27.5 years) were examined. Xerosis and the severity of disease were evaluated using the Objective Severity Assessment of Atopic Dermatitis (OSAAD) and the SCORing Atopic Dermatitis (SCORAD) index, respectively. A modified SCORAD index was calculated by removing the symptoms potentially associated with pruritus (intensity of itching and insomnia) from the standard SCORAD index. Pruritus was evaluated using both a visual analog scale and the Verbal Itch Score.

Results  The severity of AD (modified SCORAD index) correlated better than atopic xerosis (OSAAD score) with both pruritus scores, possibly indicating that the use of appropriate anti-inflammatory agents may be helpful in controlling pruritus as well as skin eruption in AD.

Conclusion  Our data suggest that the severity of disease (or skin inflammation) provides a greater contribution than xerosis to the development of pruritus in AD.

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