Figure 2. Association of Age at Symptomatic Onset (AAO) of Alzheimer Disease in Parents and Offspring.
A, The solid line indicates the r2 regression line; dashed lines, 95% CI. C, Circles indicate participants whose difference in AAO was beyond the interquartile range; center horizontal line, median; top and bottom borders of box, 75% and 25% values of interquartile range, respectively; and whiskers, interquartile range.