PD05 Investigating the course of atopic eczema up to 1 year following completion of narrowband ultraviolet B phototherapy

Abstract

Abstract Narrowband UVB (NBUVB) is a recommended second-line treatment for moderate-to-severe atopic eczema unresponsive to adequate topical therapy, and is known to induce good short-term improvement of eczema severity (Reynolds NJ, Franklin V, Gray JC et al. NBUVB and broad-band ultraviolet A phototherapy in adult atopic eczema: a randomised controlled trial. Lancet 2001; 357:2012–16). However, it is unclear how adult patients fare with their eczema severity long after completion of a course of NBUVB. We aimed to investigate the severity of atopic eczema in adults, 1 year following the completion of NBUVB, using validated clinical activity measures. We hypothesized that, after 1 year, eczema severity would remain better than at baseline (prior to having NBUVB). We undertook a multicentre prospective observational study of adults with atopic eczema (as per Hanifin and Rajka criteria) prescribed NBUVB as part of their standard clinical care. Participants had moderate-to-severe disease, with a minimum objective SCORAD of 15 and minimum Investigator’s Global Assessment (IGA) of 3, and were resistant to at least one conventional treatment (e.g. potent topical steroid). Eczema severity was assessed by selected investigators using SCORAD and IGA. Assessments were made at baseline, at the end of NBUVB and at 4, 8 and 12 months after completion of NBUVB. We aimed to recruit 80 patients at the outset to provide us with about 25–30 patients for analysis at the 1 year post-NBUVB follow-up. Eighty patients (47 men, 33 women) with a mean age of 37 years (range 18–83) were recruited, with a baseline mean (SD) SCORAD of 39.2 (12.5). Forty-nine patients could not attend to complete NBUVB or the follow-up visits thereafter. Three patients had to stop NBUVB as their eczema flared. Mean baseline SCORAD of the 28 patients who completed the study was 41.3 (14.7), with the mean IGA being 3 (range 3–4; reflecting moderate to severe disease, respectively). Compared with baseline, mean SCORAD was significantly lower at the end of NBUVB [19.1 (13); P < 0.001] and at 4 months post-NBUVB [21.9 (11.9); P < 0.001]. Furthermore, compared with baseline, there was a sustained ongoing reduction of mean SCORAD at 8 months [22.6 (13.1); P < 0.001] and 12 months post-NBUVB [21.1 (14.8); P < 0.001]. Mean SCORAD at 1 year was not statistically significantly different to that on completion of NBUVB (P > 0.5). Change in IGA matched similar sustained improvement trends with SCORAD. These findings indicate that NBUVB may provide a long-lasting effect for patients who complete a course, helping to diminish their eczema severity to a more manageable level. These data can further inform consultations with patients, when outlining the approach of NBUVB for their care.