Development and Validation of the Jawline Subject Satisfaction Scale

Area of Science:

• Aesthetic Medicine
• Psychometrics
• Item Response Theory

Background:

• Evaluating patient satisfaction is crucial in aesthetic medicine.
• Conventional methods yield imprecise ordinal scores.
• The Rasch model enhances measurement accuracy in subjective evaluations.

Purpose of the Study:

• To develop and validate a multi-item questionnaire for measuring patient satisfaction with aesthetic jawline treatments.
• To utilize the Rasch model for psychometric validation of the new scale.

Main Methods:

• A 10-item Jawline Subject Satisfaction Scale (JS³) was created using a 5-point Likert scale.
• Rasch model analysis was employed to validate psychometric properties.
• Data were collected from forty subjects undergoing aesthetic jawline treatments.

Main Results:

• The JS³ demonstrated high internal consistency (person reliability 0.86, item reliability 0.96).
• Excellent separation estimates for persons (2.50) and items (4.72) were observed.
• The scale confirmed unidimensionality and local independence, with all fit statistics within the acceptable range.

Conclusions:

• The Rasch model application resulted in a valid and reliable scale for assessing jawline aesthetic treatment satisfaction.
• The JS³ provides precise, quantifiable measurements for clinical and research applications.
• This scale enhances the evaluation of treatment outcomes in aesthetic medicine.