The Harkavy-Asnis Suicide Scale (HASS), one of the few self-report scales assessing suicidal behavior was evaluated and ideation, was evaluated and predictors of suicide attempts (SAs) were identified with the goal of developing a model that clinicians can use for monitoring SA risk. Participants were 131 pediatric emergency department (ED) patients with suicidal behavior. The HASS and Diagnostic Interview Schedule for Children (DISC-IV) were administered approximately 2 months after ED presentation. When compared with DISC-IV ratings, sensitivity of the HASS SA items was excellent (100%), and overall classification accuracy was 72%. SA planning was the strongest predictor of SAs. (Contains 5 tables and 1 figure.)