4 citations,
August 2017 in “Journal of Cosmetic Dermatology” Finger length ratio may indicate male hair loss.
Digit ratio likely doesn't predict male hair loss.
October 2023 in “Dermatology practical & conceptual” Finger length ratios might help predict common hair loss.
3 citations,
February 2019 in “Disease Markers” The index to ring finger ratio may indicate disease severity in female ankylosing spondylitis patients, but not in males.
December 2022 in “The Aging Male” Lower 2D:4D ratio and older age increase the risk of severe hair loss in men.