Table 1.
Descriptive Statistics (Mean or Percentage) by Drinking Status (N= 12,551)
| Overall | Three levels of drinking | ||||
|---|---|---|---|---|---|
|
| |||||
| Individual and network characteristics | Non-drinkers | Occasional drinkers | Frequent drinkers | Measures of association | |
| Age (in years) | 15.04 (1.70) | 14.67 (1.74) | 15.33 (1.54) | 15.70 (1.50) | η2=0.06 |
| Female | 51.68 % | 52.22% | 54.90% | 44.97% | V=0.07 |
| Race/Ethnicity | V=0.10 | ||||
| Hispanic | 18.29% | 17.76% | 19.36% | 18.65 % | |
| African American | 19.06% | 23.22% | 14.67% | 13.06% | |
| Asian | 7.35% | 8.89% | 6.23% | 4.48% | |
| White | 51.79% | 46.62% | 56.31% | 60.34% | |
| Other | 3.50% | 3.51% | 3.43% | 3.47% | |
| Academic grade (GPA) | 2.56 (0.91) | 2.64 (0.91) | 2.49 (0.89) | 2.39 (0.88) | η2=0.01 |
| Live with married biological Parents | 53.17% | 55.03% | 51.46% | 47.76% | V=0.05 |
| Parental education | 3.05 (1.20) | 3.06 (1.23) | 3.05 (1.17) | 3.04 (1.18) | η2=0.00 |
| Receive public assistance | 8.56% | 9.62% | 7.25% | 8.11% | V=0.04 |
| CES-D | 11.09 (7.50) | 10.10 (7.00) | 11.69 (7.55) | 13.20 (8.39) | η2=0.02 |
| Parental monitoring | 1.80 (1.55) | 2.06 (1.59) | 1.61 (1.46) | 1.33 (1.42) | η2=0.03 |
| Popularity (indegree) | 4.53 (3.81) | 4.17 (3.62) | 4.92 (4.00) | 5.01 (3.96) | η2=0.01 |
| Isolates | 4.10% | 5.18% | 2.83% | 3.62% | V=0.05 |
| Non-school nomination | 17% | 16% | 19% | 18% | η2=0.00 |
| Number of sport participation | 1.06 (1.38) | 1.08 (1.42) | 1.02 (1.29) | 1.07 (1.43) | η2=0.00 |
| Number of club participation | 0.94 (1.51) | 0.98 (1.52) | 0.88 (1.38) | 0.89 (1.71) | η2=0.00 |
| Network exposures | |||||
| Affiliation exposure | |||||
| Sports | 0.66 (0.69) | 0.61 (0.64) | 0.70 (0.71) | 0.78 (0.77) | η2=0.01 |
| Clubs | 0.52 (0.64) | 0.49 (0.60) | 0.55 (0.67) | 0.57 (0.72) | η2=0.00 |
| Exposure to nominated friends | 1.04 (1.02) | 0.76 (0.86) | 1.22 (1.02) | 1.58 (1.19) | η2=0.10 |
| Exposure to recip. friends | 0.76 (1.09) | 0.51 (0.88) | 0.92 (1.11) | 1.29 (1.36) | η2=0.08 |
| School-level variables | |||||
| School size | 941.90 (623.06) | 916.20 (631.39) | 987.43 (627.53) | 943.85 (583.28) | η2=0.00 |
| Prevalence of drinking | 0.51 (0.13) | 0.48 (0.13) | 0.54 (0.12) | 0.56 (0.11) | η2=0.07 |
|
| |||||
| N | 12,525 | 6,721 | 3,704 | 2,100 | |
| Percent | 99.79% | 53.66% | 29.57% | 16.77% | |
Note: The parentheses next to a given mean value denote the standard deviation. There are 26 (0.21%) missing values for the variable of level of past-year drinking. As for measures of association, V represents Cramer’s V that measures the strength of association between two categorical variables, and η2 measures the proportion of the total variance attributed to the effect.