Frequency of treatment
NB-UVB was prescribed three times a week by 59% of respondents; 31% of respondents prescribed it twice a week; 7%, five times per week; and 2%, four times a week. The typical number of treatments was 21-30 for 53% of respondents, 0-20 treatments for 24%, and 31-40 treatments for 20%.
The dose was typically increased in 10% increments, although there were wide variations in how the treatment was stepped up. Dose was increased after each treatment by almost 50% of respondents, after every two treatments by almost 25%, and after every three treatments by approximately 15%.
For the majority (53%) of respondents, response to NBUVB was assessed after 7-15 treatments, while 43% waited until after 16-30 treatments. Success was defined as a 75% reduction in eczema from baseline by 56% of respondents, while 54% looked to patient satisfaction, and 47% relied on quality of life to determine success of treatment.
Maintenance NB-UVB was never used by 54% of respondents, but 44% said they used it occasionally, and 83% said they did not follow a weaning schedule at the end of treatment.
The most commonly reported adverse effects of NB-UVB were significant erythema, hyperpigmentation, and eczema flare, while the most commonly cited absolute contraindications included a history of melanoma, a history of squamous cell carcinoma, the use of photosensitizing medications, and claustrophobia.
Use of PUVA, UVA1
The next most commonly used phototherapy for atopic eczema was PUVA. Although it was available to 83% of respondents, only 52% of respondents had personally prescribed the treatment for adults, and only 7% prescribed it for children.
Of the respondents, 71% said they would switch from NB-UVB to PUVA if desired treatment outcomes were not achieved with the former, and 44% said they would “sometimes consider” PUVA as second-line therapy instead of systemic treatments. Only 13% said they would use it concomitantly with systemic treatment.
Ultraviolet A1 (UVA1) phototherapy was not widely available, with 66% of respondents declaring that they did not have access to this option and just 29% saying they prescribed it.
But when it was used, UVA1 was cited as being used often in adults by 24% of respondents, while 33% used it was used sometimes, and 43% said it was used rarely. It was used for children by 26% of respondents. In addition, 29% said they favored using UVA1 for chronic atopic eczema, and 33% favored using it for acute eczema while 38% had no preference over whether to use it for chronic versus acute atopic eczema.
Similarly to NB-UVB, there were wide variations in the use of PUVA and UVA1 by respondents in terms of dosing schedules, duration of treatment, and how response to treatment was measured.
No funding for the study has been reported. The authors have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.