Perceived age and perceived health among a Chinese cohort : Does it mean the same thing ? / C. Messaraa in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 5 (10/2021)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 5 (10/2021) . - p. 471-481 Titre : Perceived age and perceived health among a Chinese cohort : Does it mean the same thing ? Type de document : document électronique Auteurs : C. Messaraa, Auteur ; T. J. C. Richard, Auteur ; M. Walsh, Auteur ; L. Doyle, Auteur ; C. O'Connor, Auteur ; N. Robertson, Auteur ; A. Mansfield, Auteur ; S. Hurley, Auteur ; Alain Mavon, Auteur ; A. Grenz, Auteur Année de publication : 2020 Article en page(s) : p. 471-481 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chinois(e)s Femmes Peau -- Perception visuelle Perception de l'âge Perception de l'état de santé Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Background & aims : Previous investigations have aimed at investigating parameters affecting age perception on several ethnicities. Perceived health has been a newer focus on Caucasian skin, yet little is known on the skin features used to estimate the health status of Chinese women and we aimed to investigate whether these cues are the same as those used for age perception. - Methods : Age and health appearance of 276 Chinese female volunteers were estimated from their photographs by 1025 female naïve Chinese graders 20-69 years old. Models were built to predict perceived age and health from topographic, colour and biophysical measured variables, in two subsets of the studied volunteers: below and above 50 years. Machine learning‐based predictive models for age and health perception were built on the collected data, and the interpretability of the models was established by measuring feature importance. - Results : Age perception was mostly driven by topographic features, particularly eye bags and eyelid sagging in the group below 50 years old. Wrinkles, notably from the lower part of the face and oval of the lower face, were found to be more relevant in the group above 50 years. Health appearance was primarily signalled by skin imperfections and global pigmentation in the subset below 50 years, whereas colour‐related parameters and skin hydration acted as health cues for the subset above 50 years. - Conclusion : Distinct skin features were acting as cues for age perception and/or health perception and varied per age subset. Their contribution should be borne in mind when designing products for ‘younger looking skin' and 'healthier looking skin'. Note de contenu : - MATERIALS AND METHODS : Volunteers - Photographs followed by facial attributes assessment through expert grading, dermatological grading or image analysis - Antera 3D measurements - Biozoom measurements - Probe measurements - Perceived age and perceived health assessment by naïve graders - Self-declared skin ageing concerns - Statistic analysis - Machine learning analysis - RESULTS : Robustness of the models - Skin features having an impact on perceived age - Skin features having an impact on perceived health - Self-declared skin ageing concerns - Table 1 : List of skin concerns included in the ranking question for the naïve graders - Table 2 : List of facial attributes measured from photographs, probes, Antera 3D and Biozoom according to their category - Table 3 : Average performances over 5 rounds of training/testing/validation of machine learning or dummy models, trained on different data based on demographic age and predicting health score or perceived age DOI : https://doi.org/10.1111/ics.12647 En ligne : https://drive.google.com/file/d/1tC3UerhuY_w5OkV6xYVS2HjYQy-NPaaw/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35412 [article]

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