Longitudinal trends in symptom counts are somewhat different for males and females (Figure 1 and Table 1). For males, symptom counts significantly increase from age 11 to late adolescence, peak during the early 20’s, and decline thereafter. For females there is a more prolonged plateau during the late teens and early 20’s with a marked drop only by age 29. Mean symptom counts increased more rapidly for males than females, with males maintaining higher mean-level symptoms after age 14. Variances also increased during adolescence, and decreased during the late 20’s.
