Maintenance Therapy of Narrow-band UV-B Therapy in Patients With Vitiligo

Study Overview
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Brief Summary
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Although vitiligo is difficult to cure, recurrences are frequent after treatment, and many patients suffer from concerns about recurrence as well as disease. Psoriasis, another indication for ultraviolet radiation treatment, has been established that it can safely and effectively reduce the recurrence of psoriasis through monthly maintenance therapy. The aim of this study was to evaluate the efficacy of Narrow-band UV-B therapy for the prevention of relapse in vitiligo.

Detailed Description
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For a total period of 12 months, perform Narrow-band UV-B treatment once a month. Check for signs of enlarged vitiligo lesions at 3-month intervals for a total period of 12 months. An independent evaluator will obtain the score of vitiligo area (Vitiligo Extent Score) from comparing clinical photographs of before registration and after the clinical trial, and judge whether vitiligo is recurred. This study is a randomized controlled trial, and the investigators plan to compare the recurrence rates of the experimental and control groups using the Chi-squared test.

Official Title
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Maintenance Therapy of Narrow-band UV-B Therapy in Patients With Vitiligo

Conditions
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Phototherapy, Vitiligo, Maintenance Therapy, Narrow-band UV-B

Intervention / Treatment
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* Device: Narrow-band UV-B therapy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients with age of 19 years or older Patients of generalized vitiligo with lesions on the trunk Patients who had treated with Narrow-band UV-B therapy previously and achieved more than 75% lesion improvement Patients who voluntarily agreed to participate in the study Exclusion Criteria: Patients under the age of 19 Patients with localized vitiligo and segmental vitiligo Patients who are in a state of physical or mental impairment to perform treatment or pregnant Patients with spreading of vitiligo lesions Patients who do not want to do thie study or who refuse to write a consent form Any other person deemed unsuitable for the examination at the discretion of the examiner

Ages Eligible for Study
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Minimum Age: 19 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Experimental group<br>For a total period of 12 months, perform Narrow-band UV-B therapy treatment once a month. At this time, the dose of Narrow-band UV-B therapy therapy is based on the 50% of the maximum dose that the patient received for the treatment. | Device: Narrow-band UV-B therapy<br>* Patients treated with NBUVB and showed 75% or more repigmentation rate would be included. For a total period of 12 months, narrow-band UV-B therapy is performed once a month.<br>|
| No Intervention: Control group<br>Check for signs of enlarged vitiligo lesions at 3-month intervals for a total period of 12 months. If recurrence of vitiligo is observed during the follow-up period, visit the clinic and check for recurrence. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Recurrence of vitiligo | Clinical photographs taken before and 12 months after the completion of the study. The photographs will be used to measure the area of vitiligo lesion, and the investigators will compare the area score and judge whether or not there is a recurrence. | change from baseline area score at 12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The assessment of patient satisfaction | The assessment of patient satisfaction using five-point Likert scale. (Scale 1: strongly not-satisfied, Scale 2: Not-satisfied, Scale 3: Neither satisfied nor not-satisfied, Scale 4: Satisfied, Scale 5: Strongly satisfied) | at baseline and at 12 months |