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The effect of maintenance narrow‐band ultraviolet B therapy on the duration of remission for psoriasis: a prospective randomized clinical trial
Author(s) -
Boztepe Gonca,
Karaduman Ayşen,
Şahin Sedef,
Hayran Murat,
Kölemen Fikret
Publication year - 2006
Publication title -
international journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 93
eISSN - 1365-4632
pISSN - 0011-9059
DOI - 10.1111/j.1365-4632.2004.02398.x
Subject(s) - medicine , maintenance therapy , psoriasis , plaque psoriasis , psoriasis area and severity index , randomized controlled trial , maintenance dose , surgery , ultraviolet b , dermatology , chemotherapy
Background Narrow‐band (311 nm) UVB is an effective treatment modality for moderate to severe psoriasis. The effect of maintenance narrow‐band UVB on the duration of remission is unknown. Aim To determine whether maintenance narrow‐band UVB affects the duration of remission. Methods After clinically significant improvement [defined as 75% reduction in the initial Psoriasis Area and Severity Index (PASI) = “PASI 75”], patients were randomly assigned to one of two groups, namely maintenance and no maintenance. The first group received 2 months of maintenance therapy; the second group received no further treatment. Both groups were followed up for 1 year. Results At the end of 12 weeks, 46 of 50 patients (92%) achieved “PASI 75”. Of these 46 patients, 32 had plaque‐type psoriasis and 14 had guttate‐type psoriasis. The numbers of patients assigned to the maintenance and no maintenance groups were 22 and 24, respectively. At the end of the study, 12 of the 22 patients (55%) in the maintenance group and, by contrast, eight of the 24 patients (33%) in the no maintenance group were still in remission. When the patients in both groups were categorized according to the type of psoriasis, eight of 14 (57%) patients with plaque‐type psoriasis in the maintenance group and, by contrast, three of 18 (17%) in the no maintenance group were still in remission. Although numerically significant, life‐table analysis indicated no statistically significant difference for the probability of remaining in remission between maintenance and no maintenance groups. Conclusions The results provide some evidence that maintenance narrow‐band UVB may achieve longer remission durations for patients with plaque‐type psoriasis.