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Reproducibility of two four-point clinical severity scores for lateral canthal lines (crow's feet)
- Source :
- Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.]. 32(10)
- Publication Year :
- 2006
-
Abstract
- BACKGROUND Several clinical scoring systems have been used to evaluate the efficacy of botulinum toxin A in the treatment of hyperkinetic wrinkles. So far very few have been investigated for their reproducibility. OBJECTIVE The aim of this study was to investigate the reproducibility of two clinical four-point scales for lateral canthal lines (crow's feet), at rest and at maximum smile. MATERIAL AND METHODS Based on standardized photographs, a consensus atlas depicting the different severity grades [from 0 (none) to 3 (severe)] was developed. After training based on the atlas, 49 photographs at rest and 48 at maximum smile were graded by the same group of investigators on 2 consecutive days (n=9 on Day 1; n=8 on Day 2). The scores were compared for reproducibility using kappa statistics. RESULTS Overall, reproducibility was good for both scales. Interobserver reproducibility showed an agreement of 0.6 at rest and 0.58 at maximum smile (unweighted kappa). Intraobserver reproducibility showed an agreement between 0.47 and 0.86 at rest and between 0.62 and 0.81 at maximum smile (unweighted kappa). Using weighted kappa analysis, the agreement ranged between 0.63 and 0.91 at rest and between 0.71 and 0.85 at maximum smile. CONCLUSION The clinical scales using scores of 0 to 3 for crow's feet, both at rest and at maximum smile, show a good inter- and intraobserver reproducibility. The use of these scores in clinical trials can be recommended.
- Subjects :
- Male
medicine.medical_specialty
Interobserver reproducibility
Dermatology
Cosmetic Techniques
Botulinum toxin a
Crow's feet
Cohen's kappa
medicine
Photography
Humans
Clinical severity
Orthodontics
Observer Variation
Reproducibility
business.industry
Reproducibility of Results
General Medicine
Surgery
Skin Aging
Face
Female
business
Intraobserver reproducibility
Kappa
Subjects
Details
- ISSN :
- 10760512
- Volume :
- 32
- Issue :
- 10
- Database :
- OpenAIRE
- Journal :
- Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.]
- Accession number :
- edsair.doi.dedup.....9772335ab66aa970046334777b769bb3