Figure 1. Time line of trial. Measures include EASI (Emotionality, Activity, Sociability, Impulsivity Instrument), STAI (State Trait Anxiety Inventory), VAS (Visual Analog Scale), HR (heart rate), BP (blood pressure), YPAS (Yale Preoperative Anxiety Scale), CARS (Clinical Anxiety Rating Scale), and PHBQ (Post Hospitalization Behavior Questionnaire). Subjects measured at different times across the trial included the child (C), parent (P), and the anesthesiologist (A).