Clinical features of atopic dermatitis in a hospital‐based setting in China

Background Atopic dermatitis (AD) is a chronic relapsing inflammatory skin disease. There have been few detailed reports of the clinical evaluation of Chinese patients with AD. Objectives To give a profile of the clinical features of Chinese AD patients in a university hospital setting. Methods A total of 1008 cases met Hanifin and Rajka diagnostic criteria of AD were recruited at Xinhua Hospital, Shanghai Jiaotong University School of Medicine, China. Results In our survey, 22.7% patients were mild, 66.6% were moderate and 10.7% were severe according to the SCORAD index. Both the frequency and severity of the male patients were slightly higher. The frequency of asthma among the AD patients was 16.7% and it was increased with the age (χ² = 205.20, P = 0.000). The frequencies of objective minor signs were demonstrated with age‐related changes. Besides, three localized variants including eyelid eczema (49.8%), scalp dermatitis (49.7%), infra‐auricular and retroauricular fissuring (44.8%) were commonly observed, especially in the infantile phase (P < 0.01). It was showed significant differences in serum total immunoglobulin E (IgE) and eosinophil cationic protein (ECP) levels of different age groups. The positive rate of Phadiatop was raised after 3 years old and that of the common food allergens were decreased after 6 years old. Conclusions More males than females had ongoing AD in our survey. Most AD debuted in the first year of the cases. High incidence of the three clinical signs: eyelid eczema, scalp dermatitis and infra‐auricular and retroauricular fissuring among the patients suggests it can be a potential valuable diagnostic clue to AD.