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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Measurement of the severity of rosacea.
Journal of the American Academy of Dermatology 2004 November
BACKGROUND: There are no standardized measures for the severity of rosacea.
OBJECTIVES: To determine what clinical signs correlate best with global severity of rosacea, and to examine inter-rater reliability. Methods Four clinicians each made 82 assessments of rosacea patients. Each assessment used 60 0-to-10 Likert-like scales for the signs of rosacea. Subjects also assessed the severity of their rosacea.
RESULTS: The clinicians' assessment of global severity correlated strongly with erythema, especially on the cheeks. Subjects' assessment of global severity correlated more strongly with papules/pustules. Different methods of assessing severity--estimation of area involved, intensity, or lesion counts--did not produce significantly different results. Inter-rater reliability was low on 11-point (0-10) scales, but improved when scales were collapsed to 5 or 4 points.
CONCLUSIONS: Clinicians and patients assess severity of rosacea differently, with clinicians focusing on erythema and patients focusing on papules/pustules. New instruments for assessing severity must address inter-rater reliability.
OBJECTIVES: To determine what clinical signs correlate best with global severity of rosacea, and to examine inter-rater reliability. Methods Four clinicians each made 82 assessments of rosacea patients. Each assessment used 60 0-to-10 Likert-like scales for the signs of rosacea. Subjects also assessed the severity of their rosacea.
RESULTS: The clinicians' assessment of global severity correlated strongly with erythema, especially on the cheeks. Subjects' assessment of global severity correlated more strongly with papules/pustules. Different methods of assessing severity--estimation of area involved, intensity, or lesion counts--did not produce significantly different results. Inter-rater reliability was low on 11-point (0-10) scales, but improved when scales were collapsed to 5 or 4 points.
CONCLUSIONS: Clinicians and patients assess severity of rosacea differently, with clinicians focusing on erythema and patients focusing on papules/pustules. New instruments for assessing severity must address inter-rater reliability.
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