Fig. 6From: Difference between the biologic and chronologic age as an individualized indicator for the skin care intensity selection: skin topography and immune system state studies, parameter correlations with age differenceAverage skin roughness Sa (a) and maximum stretching of the roughness profile difference between the highest “peak” and the deepest “valley” within the whole measured area) Smax (b) for all participants. In the corresponding trend lines, best fit is given by exponential curves (see Table 1). Note that positive normalized age difference (BA – CA)/CA corresponds to young, negative difference to elderly participantsBack to article page