The omnibus GLM model examining the relationship of ImpSS scores and frequency of past month alcohol use indicated a significant association (F(3, 2729) = 76.32, p < .001, partial ε2 = .079). Bonferonni-corrected post hoc comparisons indicated that ImpSS scores increased in line with increasing frequency of alcohol consumption, with all groups significantly different (p = .01). Those who consumed alcohol on 10 or more days had the highest ImpSS scores (EMM = 12.61 ± 4.298), followed by those who consumed on three to nine days (EMM = 11.59 ± 4.070). Those who used alcohol on one or two days had the third-highest ImpSS scores (EMM = 10.71 ± 4.224), and adolescents who did not use had the lowest ImpSS scores (EMM = 9.12 ± 4.484). Adolescents who had consumed alcohol in a binge fashion (11.82 ± 4.172) had higher impulsive sensation seeking scores as compared to those who did not binge (9.61 ± 4.490; F(1, 2718) = 157.69, p < .001, partial ε2 = .056). These analyses are summarized in Figure 1.
