Follicular fluorescence quantity to characterize acne severity: a validation study.
Skin Res Technol
; 22(4): 451-459, 2016 Nov.
Article
en En
| MEDLINE
| ID: mdl-26804729
ABSTRACT
BACKGROUND:
Porphyrins are native fluorophores in the follicle openings, visible under ultraviolet-A light. Acne severity might be associated with increased Propionibacterium acnes colonization and porphyrin production. Aim of this study was to investigate whether the parameter fluorescence quantity can be used to measure acne severity.METHODS:
A validation study was conducted in 24 patients with acne using split-face design. Acne severity was measured using Investigator Static Global Assessment scores and lesion counts. Reliability, construct validity and sensitivity to change in fluorescence quantity were investigated.RESULTS:
Mean baseline Investigator Static Global Assessment score was 2.7 (SD 0.1). Mean baseline fluorescence quantities were 24.8 (SD 4.0) on the cheek and 20.3 (SD 4.6) on the chin. On day 25, values ranged from 6.0 (SD 6.0) to 18.1 (SD 18.4) on the cheek and from 2.6 (SD 4.4) to 14.7 (SD 16.2) on the chin. The intraclass correlation coefficients of fluorescence quantity ranged from 0.513 to 0.987. Effect sizes for fluorescence measurements were highest on the chin and cheek ranging from 0.24 to 0.77 and 0.32 to 0.75, respectively.CONCLUSION:
Fluorescence quantity indicates acne severity, especially on the inner cheek and chin areas. Fluorescence quantity is reliable but is not as sensitive as manual lesion counting.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Porfirinas
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Espectrometría de Fluorescencia
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Acné Vulgar
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Microscopía Fluorescente
Tipo de estudio:
Clinical_trials
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Diagnostic_studies
Límite:
Adolescent
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Adult
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Female
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Humans
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Male
Idioma:
En
Año:
2016
Tipo del documento:
Article