Ludwig Classification for Women
In addition to the Ludwig scale for female pattern baldness, Olsen in 1999 graded female hair loss into 3 stages based on a frontal accentuation pattern in which the hair loss was more profound in the frontal region that gradually tapered back toward less hair loss in the occiput when viewed with a central hair part. This pattern of hair loss resembles a Christmas tree when viewed with the patient looking down, and according to Olsen accounts for 70% of female pattern loss. In stage 1, there is mild to moderate frontal accentuation loss. In stage 2, there is both frontal accentuation that can be more severe than in stage 1 and mixed with diffuse hair loss. In stage 3, the loss is so severe that only diffuse thinning is principally noted.