Table 1 summarizes descriptive statistics for the key study variables, separately for EA and AA. In the EA sample, age at initiation of regular drinking was 17.08 years. Approximately 40% of the EA sample was exposed to parental separation. In the AA sample, age at initiation of regular drinking was 18.07 years. Approximately 66% of the AA sample experienced parental separation. Table S1, available online, presents mean and standard deviation for frequency of HED by age and ancestry. Table S2, available online, provides zero-correlations for EA and AA separately. Although parental discord and parental separation were related, they represent distinct constructs. Parental discord was only moderately correlated with parental separation in both the EA (r = 0.31, p < .05) and the AA (r = 0.23, p < .05) samples.Table 1Descriptive Statistics for Key Study Variables in the European American and African American ParticipantsEAAAMean (SD) or %Mean (SD) or %Participants, n1,761894Sex, female51%52%Age at first assessment16.41 (3.29)16.36 (3.31)Age at last assessment24.80 (4.87)24.99 (4.56)No. of assessments4.71 (1.99)4.61 (1.81)Age at initiation of regular drinking17.08 (2.78)18.07 (2.88)Parental education, y13.91 (2.14)12.29 (1.84)Parental separation40%66%Parental discord1.00 (1.15)1.11
