F19 ALOPECIA PATTERN OF MALE IN FRANCE
Cartron M1, Jammayrac O1, Bastien P1, Deloche C1, Galan P2, Hercberg S2, de Lacharrière O1
1L’Oréal Recherche, Clichy, France
2ISTNA, Paris, France

The SUVIMAX study is a French national program done in France on 4050 men, aged between 42 and 64 years and 6231 women aged between 35 and 60 years. Data were collected on hair and scalp features on the whole cohort. We present here the results of the male cohort. Based on the Hamilton scale, the prevalence of androgenetic alopecia (AGA) is significantly lower in the South Eastern region of France with 40% of men without alopecia in comparison to an average of 32.4% in the rest of France. In addition focusing on alopecia, we performed a multivariate analysis (MCA and PCA). This statistical approach allowed us to clarify the subjects according to their alopecia profile and also to calculate an alopecia score. The results demonstrate the existence of four different classes of men each with a different alopecia profile: Non alopecic (21.5%), Weak alopecic (31%), Moderate alopecic (32.6%) and Severe alopecic (14.9%). The higher the severity of the alopecia class is, the lower the age of onset for alopecia. Interestingly, the severe alopecia class is the only class characterized by a familial pattern of alopecia. Our results show two important findings: (i) The alopecia prevalence is not equally distributed all over France. The significant lower prevalence in the South Eastern region could be linked to nutritional habits. (ii) The familial hereditary factors for alopecia are only observed for severe alopecia, this could suggest the existence of two forms of alopecia: severe alopecia with a strong genetic influence and a weak/ moderate alopecia linked to the aging process.