Figure 1From: Association of ENPP1gene polymorphisms with hand osteoarthritis in a Chuvasha populationAge-dependence of osteoarthritis of the hand in men and women in the Chuvashian population sample. FS1-OA is the first factor score obtained from the principal component analysis of OA (osteoarthritis). The regression coefficients were calculated using the statistical package FISHER [25].Back to article page