Example of how quantitative variables displaying a nonhomogeneous risk in visual display were split in high- and low-risk categories. Example of how quantitative variables displaying a nonhomogeneous risk in visual display were split in high- and low-risk categories. Cumulative incidence of diabetes in women with previous GDM is depicted according to the quintile of prepregnancy BMI (A) and after grouping the first four quintiles (B). Mercè Albareda et al. Dia Care 2003;26:1199-1205 ©2003 by American Diabetes Association