The<unk>  is used to classify the stages of male pattern baldness. The stages are described with a number from 1 to 7. This measurement<unk>  was first introduced by James<unk>  in the 1950s and later revised and updated by O'Tar<unk>  in the 1970s. It is sometimes referred to as the<unk> –Hamilton<unk>  or simply the<unk><unk> . The<unk>  is regularly used by doctors to assess the severity of baldness, but it is not considered very reliable since examiners' conclusions can vary.
Hamilton–Norwood scale
Baux score
Kapandji score
Modified Ashworth scale
Jadad scale
SCORTEN scale
Eagle score
Prader scale