Are Dupa (Diffuse Unpatterned Alopecia) and Age related thinning the same condition, just that the former name is applied if it develops in a young person whereas the latter name is applied when it develops in a person of advanced age?
No, these are not the same. DUPA usually has miniaturization well over 50%, if not 70% or more, while aging expresses itself in two manners, (1) Age Related Thnning. This appears with thinning of the hair shafts that are universal and uniform of (2) loss of hair follicles in the follicular unit. This appears as a drop in total hair count per follicular unit and the entire head.