The demographic characteristics of the entire survey sample, and the characteristics of the sample split into those with complete data and those without complete data are summarized in Table 1. Of the 4523 adolescents who participated in the survey, 2733 (60.4%) had complete data for the analyses conducted here. Of those 1790 adolescents with missing data, 624 (34.9% of those with missing data) were only missing data on current alcohol use patterns, 880 (49.2% of those with missing data) were missing data from the impulsive sensation seeking scale and 286 (16.0% of those with missing data) were missing data from both. Comparisons of subjects with complete data and those without complete data revealed that students with complete data were more likely to be female, slightly older, in a later grade (i.e., 11th or 12th grades), of medium or higher income, and of Caucasian ethnicity and were less likely to be of Hispanic/Latino, African-American or “Other” descent. These data are summarized in Table 1.
