Observational pilot study of multi-wavelength wearable light dosimetry for erythropoietic protoporphyria

Amy K. Dickey, Jaime Berkovich,Rebecca K. Leaf, Paul Y. Jiang, Gisela Lopez-Galmiche,Lina Rebeiz,Kristen Wheeden,Irene Kochevar, William Savage,Sophia Zhao, Elizabeth Campisi, Seung Y. Heo,Jacob Trueb,Ethan P. M. LaRochelle,John Rogers,Anthony Banks,Jan-Kai Chang

INTERNATIONAL JOURNAL OF DERMATOLOGY(2024)

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摘要
BackgroundErythropoietic protoporphyria (EPP) causes painful light sensitivity, limiting quality of life. Our objective was to develop and validate a wearable light exposure device and correlate measurements with light sensitivity in EPP to predict and prevent symptoms.MethodsA wearable light dosimeter was developed to capture light doses of UVA, blue, and red wavelengths. A prospective observational pilot study was performed in which five EPP patients wore two light dosimeters for 3 weeks, one as a watch, and one as a shirt clip.ResultsStandard deviation (SD) increases from the mean in the daily blue light dose increased the odds ratio (OR) for symptom risk more than the self-reported outdoor time (OR 2.76 vs. 2.38) or other wavelengths, and a one SD increase from the mean in the daily blue light wristband device dose increased the OR for symptom risk more than the daily blue light shirt clip (OR 2.45 vs. 1.62). The area under the receiver operator curve for the blue light wristband dose was 0.78, suggesting 78% predictive accuracy.ConclusionThese data demonstrate that wearable blue light dosimetry worn as a wristband is a promising method for measuring light exposure and predicting and preventing symptoms in EPP.
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关键词
blue light,erythropoietic protoporphyria,light dosimetry,light sensitivity,photosensitivity,protoporphyria,wearable technology
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