Development and validation of a photonumeric scale for assessment of chin retrusion

Jonathan M Sykes, Alastair Carruthers, Bhushan Hardas, Diane K. Murphy, Derek Jones, Jean Carruthers, Lisa Donofrio, Lela Creutz, Ann Marx, Sara Dill

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Background: A validated scale is needed for objective and reproducible comparisons of chin appearance before and after chin augmentation in practice and clinical studies. Objective: To describe the development and validation of the 5-point photonumeric Allergan Chin Retrusion Scale. Methods: The Allergan Chin Retrusion Scale was developed to include an assessment guide, verbal descriptors, morphed images, and real subject images for each scale grade. The clinical significance of a 1-point score difference was evaluated in a review of multiple image pairs representing varying differences in severity. Interrater and intrarater reliability was evaluated in a live-subject validation study (N = 298) completed during 2 sessions occurring 3 weeks apart. Results: A difference of ≥1 point on the scale was shown to reflect a clinically meaningful difference (mean [95% confidence interval] absolute score difference, 1.07 [0.94-1.20] for clinically different image pairs and 0.51 [0.39-0.63] for not clinically different pairs). Intrarater agreement between the 2 live-subject validation sessions was substantial (mean weighted kappa = 0.79). Interrater agreement was substantial during the second rating session (0.68, primary end point). Conclusion: The Allergan Chin Retrusion Scale is a validated and reliable scale for physician rating of severity of chin retrusion.

Original languageEnglish (US)
Pages (from-to)S211-S218
JournalDermatologic Surgery
Volume42
DOIs
StatePublished - 2016

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Chin
Validation Studies
Confidence Intervals
Physicians

ASJC Scopus subject areas

  • Surgery
  • Dermatology

Cite this

Sykes, J. M., Carruthers, A., Hardas, B., Murphy, D. K., Jones, D., Carruthers, J., ... Dill, S. (2016). Development and validation of a photonumeric scale for assessment of chin retrusion. Dermatologic Surgery, 42, S211-S218. https://doi.org/10.1097/DSS.0000000000000849

Development and validation of a photonumeric scale for assessment of chin retrusion. / Sykes, Jonathan M; Carruthers, Alastair; Hardas, Bhushan; Murphy, Diane K.; Jones, Derek; Carruthers, Jean; Donofrio, Lisa; Creutz, Lela; Marx, Ann; Dill, Sara.

In: Dermatologic Surgery, Vol. 42, 2016, p. S211-S218.

Research output: Contribution to journalArticle

Sykes, JM, Carruthers, A, Hardas, B, Murphy, DK, Jones, D, Carruthers, J, Donofrio, L, Creutz, L, Marx, A & Dill, S 2016, 'Development and validation of a photonumeric scale for assessment of chin retrusion', Dermatologic Surgery, vol. 42, pp. S211-S218. https://doi.org/10.1097/DSS.0000000000000849
Sykes, Jonathan M ; Carruthers, Alastair ; Hardas, Bhushan ; Murphy, Diane K. ; Jones, Derek ; Carruthers, Jean ; Donofrio, Lisa ; Creutz, Lela ; Marx, Ann ; Dill, Sara. / Development and validation of a photonumeric scale for assessment of chin retrusion. In: Dermatologic Surgery. 2016 ; Vol. 42. pp. S211-S218.
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