There are known differences between men and women with regard to index to ring finger length ratio. The index finger is referred to as the second digit, and the ring finger is referred to as the fourth digit. Men typically have shorter second digit (index) than fourth digits (ring). In women, the second and fourth digits are usually equal in length. Researchers concluded that having uncommonly long ring fingers raises the risk of developing knee osteoarthritis, particularly among women -- independent of all other risk factors for osteoarthritis.
My index finger is a good bit shorter than my ring finger. I have OA in my knees. It's right in my case. It would be interesting to hear if this is the case for other's here.