Figure 2From: Association between adolescent idiopathic scoliosis prevalence and age at menarche in different geographic latitudes A. Illustration of the regression of age at menarche (in years) by latitude (in degrees) (p < 0.001). B. The linear correlation between age at menarche and geographic latitude is better shown in the figure where all observations below latitude of 25 degrees are not described.Back to article page