A follow-up phone interview was then conducted on a subset of the youth to better understand depressive symptoms, functional impairment, and health behaviors. In particular, the researchers were interested in comparing youth with high levels of depressive symptoms (which we'll label PHQ[ PHQ stands for Patient Health Questionnaire, which was the 2-item depression scale that was used in the study's questionnaire to assess for depressive symptoms. ] high) to youth without high levels of depressive symptoms (which we'll label PHQ low) on a number of questions. For the question of "Have you ever ridden in a car driven by someone (including yourself) who was "high", 46 (out of 202) of the PHQ low said yes and 84 (out of 242) of the PHQ high said yes. [Note: Being "high" refers to being under the influence of drugs or alcohol.]