494: IN-HOSPITAL RISK FACTORS TO PREDICT CHILDREN AT RISK OF POSTTRAUMATIC STRESS AFTER PICU ADMISSION. (16th December 2021) - Chau, Ariya; Eckberg, Ryan A; Ehrlich, Lili; Ledbetter, David; Eugene, Laksana; Aczon, Melissa; Gold, Jeffrey; Wetzel, Randall; Nelson, Lara