Development and validation of ibsa photographic scale for the assessment of neck laxity

Antonello Tateo, Gabriel Siquier-Dameto, Ofir Artzi, Dalvi Humzah, Beatriz Molina, Ravi Jain, Arturo Lanzarotti, Malika Laouedj, Nicolas Dapis, Gilberto Bellia*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Objective: To describe the development and validation of the 5-grade photographic IBSA Neck Laxity Scale. Methods: The scale was developed from 2 real images, which led to the creation of 5 morphed images, representing different degrees of severity of laxity of the neck. For validation, a set of 50 images (25 real and 25 morphed) was created and sent for evaluation to 6 trained raters (physicians) in 2 rounds, 1 month apart. Raters had to assess each image according to the 5-image scale. Inter-rater and intra-rater reliability in both rounds was evaluated. Results: As to intra-rater reliability, single rater kappa scores between 0.69 and 0.87, and a global kappa score of 0.78 were observed. Inter-rater agreement was measured by means of the intra-class correlation coefficient and scores higher than 0.85 were reported, indicating excellent reliability. Conclusion: IBSA Neck Laxity Scale is a validated and reliable scale.

Original languageEnglish
Pages (from-to)349-354
Number of pages6
JournalClinical, Cosmetic and Investigational Dermatology
StatePublished - 2021
Externally publishedYes


  • Aesthetic medicine
  • Laxity
  • Neck
  • Photographic scale
  • Scale development
  • Scale validation


Dive into the research topics of 'Development and validation of ibsa photographic scale for the assessment of neck laxity'. Together they form a unique fingerprint.

Cite this