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Assessment of the usefulness of skin phototype and skin color as the parameter of cutaneous narrow band UVB sensitivity in psoriasis patients

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Abstract:

Background:

Many reports have been released to assess skin types, skin colors and cutaneous sensitivity to broad band UVB or UVA. Objective:

This study was performed to investigate the usefulness of skin type and skin color as the parameter of narrow band UVB (NBUVB) sensitivity. Methods:

The minimal erythema dose (MED) of 40 psoriasis patients was investigated by irradiating several doses ranging from 200 to 1500 mJ/cm2. Before phototesting, the skin color of buttock was measured with a tristimulus colorimeter. Results:

The median and mode value of MED of NBUVB was 950 mJ/cm2. Skin type was well correlated with the MED and there was a significant relationship between the L* value and MED, but not for the a* and b* values. Conclusion:

The MED value of NBUVB in our study is a basic data to set the phototherapy protocol. Our result showed that skin type and L* value might be useful for predicting the sensitivity to NBUVB irradiation.

Keywords: narrow band UVB; skin color; skin phototype

Document Type: Research Article

DOI: https://doi.org/10.1034/j.1600-0781.2003.00047.x

Affiliations: 1: Department of Dermatology, Seoul National University College of Medicine and Clinical Research Institute, Seoul National University Hospital, Seoul, Korea 2: Department of Dermatology, Konkuk University College of Medicine, Seoul, Korea

Publication date: 2003-10-01

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