ABSTRACT
BACKGROUND: New treatment methods for cellulite require globally accepted scales for aesthetic research and patient evaluation. OBJECTIVE: To develop a set of grading scales for objective assessment of cellulite dimples on female buttocks and thighs and assess their reliability and validity. MATERIALS AND METHODS: Two photonumeric grading scales were created and validated for dimples in the buttocks in female patients: Cellulite Dimples-At Rest, and Cellulite Dimples-Dynamic. Sixteen aesthetic experts rated photographs of 50 women in 2 validation sessions. Responses were analyzed to assess inter-rater and intra-rater reliability. RESULTS: Overall inter-rater reliability and intra-rater reliability were both "almost perfect" (≥0.81, intraclass correlation efficient and weighted kappa) for the At Rest scale. For the Dynamic scale, inter-rater reliability and intra-rater reliability were "substantial" (0.61-0.80). There was a high correlation between the cellulite scales and body mass index, age, weight, and skin laxity assessments. CONCLUSION: Consistent outcomes between raters and by individual raters at 2 time points confirm the reliability of the cellulite dimple grading scales for buttocks and thighs in female patients and suggest they will be a valuable tool for use in research and clinical practice.
Subject(s)
Buttocks , Cellulite/diagnosis , Esthetics , Physical Examination/methods , Thigh , Adult , Age Factors , Body Mass Index , Body Weight , Cellulite/therapy , Cosmetic Techniques , Female , Humans , Observer Variation , Photography , Reproducibility of Results , Skin Physiological Phenomena , Young AdultABSTRACT
BACKGROUND: The demand for noninvasive skin-tightening body procedures is increasing. OBJECTIVE: To develop a set of grading scales for the objective assessment of skin laxity and assess their reliability and validity. MATERIALS AND METHODS: Two photonumeric grading scales were created and validated for skin laxity in female patients: Skin Laxity-Posterior Thighs/Buttocks, and Anterior Thighs/Knees. Fifteen aesthetic experts rated photographs of 50 women in 2 validation sessions. Responses were analyzed to assess inter-rater and intra-rater reliability. RESULTS: Overall inter-rater reliability according to intraclass correlation efficient (ICC) 2.1 and weighted kappa was at least "substantial" for both scales in both sessions, and "almost perfect" (≥0.81) for the Anterior Thighs and Knees scale in session 2. Intra-rater reliability was "almost perfect" for both scales (ICC 2.1) and "substantial" to "almost perfect" by weighted kappa. A correlation between the skin laxity scales and body mass index, age, weight, sun exposure, and cellulite severity was observed. CONCLUSION: The skin laxity photonumeric grading scales are valid and reliable instruments for assessing laxity on the posterior thighs and buttocks, and anterior thighs and knees. The scales will be of value for standardizing clinical evaluations and quantifying outcome measurements in research and clinical practice.
