Impact of Events Scale–Revised (IES-R) total score (range, 0-88; at least 33 indicates probable presence of a posttraumatic stress disorder). Submeasures include IES-R Avoidance Score, Intrusion Score, and Hyperarousal Score (range, 0-4, no thresholds available). IES-R was administered 1 to 3 days after the amyloid–positron emission tomography result disclosure. The horizontal line inside the box indicates the median; lower and upper hinges of the box, 25th and 75th percentiles, respectively; lower whisker, smallest observation greater than or equal to lower hinge − 1.5 × IQR; upper whisker, largest observation less than or equal to upper hinge + 1.5 × IQR; and individual points (when present), outliers.
aIndicates statistically significant difference (P < .05).