"I Want It to Look Natural": Development and Validation of the FACE-Q Aesthetics Natural Module.

BACKGROUND: The concept of "natural" after a facial aesthetic treatment represents an understudied area. We added scales to FACE-Q Aesthetics to provide a means to measure this concept from the patient's perspective. OBJECTIVES: The objective of this study was to develop and validate the FACE-Q Aesthetic Natural module. METHODS: Concept elicitation interviews with people having minimally invasive treatments were conducted to explore the natural concept and develop scales. Patient and expert input refined scale content. An online sample (ie, Prolific) of people who had a facial aesthetic treatment was analyzed with Rasch measurement theory to examine psychometric properties. A test-retest reliability study was performed, and construct validity was examined. RESULTS: Interviews with 26 people were conducted. Three scales were developed and refined with input from 12 experts, 11 patients, and 184 online survey participants. Data from 1358 online participants provided evidence of scale reliability and validity. Reliability was high with person separation index, Cronbach alpha, and intraclass correlation coefficient values without extremes ≥0.82. Tests of construct validity confirmed that the scales functioned as hypothesized. Higher scores on the Expectations scale were associated with how important it was to have a natural look and movement after treatment. In addition, higher scores on the Natural Appearance and Natural Outcome scales correlated with better scores on other FACE-Q Aesthetics scales, and were associated with the face looking and feeling natural and with overall satisfaction with facial appearance. CONCLUSIONS: Many people seeking facial aesthetic treatments want to look natural after treatment. These new FACE-Q Aesthetics scales provide a means to measure the concept of natural from the patient's perspective.

Extending the Range of Measurement for Minimally Invasive Treatments by Adding New Concepts to FACE-Q Aesthetics Scales.

Background: The Satisfaction with Face Overall and Psychological Function scales are the most frequently used FACE-Q Aesthetics module scales. This study aimed to extend their range of measurement by adding and testing new concepts. We aimed to create FACE-Q Aesthetics item libraries. Methods: In-depth concept elicitation interviews were conducted. Concepts were formed into items and refined through multiple rounds of patient and expert input. The items were tested with people living in the United States, Canada, and the United Kingdom who had minimally invasive facial aesthetic treatments. Participants were recruited through an online platform (ie, Prolific). Psychometric properties were examined using Rasch measurement theory analysis, test-retest reliability, and construct validity. Results: We conducted 26 interviews. New concepts were developed into items and refined with input from 12 experts, 11 clinic patients, and 184 Prolific participants. A sample of 1369 Prolific participants completed 52 appearance and 22 psychological items. After removing 10 and 2 items respectively, the psychometric tests provided evidence of reliability with the person separation index, Cronbach alpha, and test-retest reliability values without extremes of 0.88 or more. For validity, lower scores were associated with looking older than one's age, being more bothered by facial skin laxity, treatment wearing off, and having deeper lines on Merz Assessment scales. Short-form scales formed from the 42 appearance items provide examples of item library application. Conclusions: This study provides an innovative means to customize scales to measure appearance and psychological function that maximizes content validity and minimizes respondent burden in the context of minimally invasive treatments.

The SKIN-Q: An Innovative Patient-Reported Outcome Measure for Evaluating Minimally Invasive Skin Treatments for the Face and Body.

Background: As the aesthetics field continues to innovate, it is important that outcomes are carefully evaluated. Objectives: To develop item libraries to measure how skin looks and feels from the patient perspective, that is, SKIN-Q. Methods: Concept elicitation interviews were conducted and data were used to draft the SKIN-Q, which was refined with patient and expert feedback. An online sample (i.e., Prolific) provided field-test data. Results: We conducted 26 qualitative interviews (88% women; 65% ≥ 40 years of age). A draft of the SKIN-Q item libraries were formed and revised with input from 12 experts, 11 patients, and 174 online participants who provided 180 survey responses. The psychometric sample of 657 participants (82% women; 36% aged ≥40 years) provided 713 completed surveys (facial, n = 595; body, n = 118). After removing 14 items, the psychometric analysis provided evidence of reliability (≥0.85) and validity for a 20-item set that measures how skin feels and a 46-item set that measures how skin looks. Short-form scales were tested to provide examples for how to utilize the item sets. Conclusion: The SKIN-Q represents an innovative way to measure satisfaction with skin (face and body) in the context of minimally invasive treatments.