Another limitation of the age-based approach is that a varying number of assessments were available within each age range. This might be of concern if widely varying numbers of assessments were present so that power issues might affect one age range and not another. Examination of the number of assessments by age shows remarkable uniformity in available data up to the age of 22. Therefore, our conclusion that the 8–12 age range was associated with risk status but the other age range (13–18) was not could not have been based on insufficient cases in the older age ranges under age 22.
