Table 1.
Prevalence and Frequency of Alcohol Use From Grade 9 to Grade 12 by Ethnic Groups and Gender
| Caucasian (N = 191) % (n) |
African American (N = 94) % (n) |
Latino (N = 79) % (n) |
Females (N = 195) % (n) |
Males (N = 169) % (n) |
Total (N = 364) /)% (n) |
|
|---|---|---|---|---|---|---|
| Grade | M (SD) | M (SD) | M (SD) | M (SD) | M (SD) | M (SD) |
| Grade 9 spring | 25.0 (47) 0.92 (0.93) |
29.2 (26) 0.74 (0.42) |
21.8 (17) 0.61 (0.54) |
28.0 (54) 0.72 (0.67) |
22.2 (36) 0.94 (0.85) |
25.4 (90) 0.81 (0.75) |
| Grade 10 fall | 26.9 (46) 0.83 (0.62) |
25.0 (22) 0.71 (0.73) |
27.4 (20) 0.72 (0.61) |
27.9 (50) 0.77 (0.66) |
24.8 (38) 0.79 (0.64) |
26.5 (88) 0.78 (0.64) |
| Grade 10 spring | 34.5 (57) 1.08 (0.90) |
37.2 (29) 1.06 (0.74) |
33.9 (21) 0.85 (0.76) |
36.5 (61) 0.95 (0.78) |
33.3 (46) 1.13 (0.90) |
35.1 (107) 1.03 (0.83) |
| Grade 11 fall | 34.9 (52) 1.29 (0.92) |
32.9 (25) 0.91 (0.88) |
30.8 (16) 1.10 (0.80) |
37.8 (56) 1.01 (0.80) |
28.7 (37) 1.37 (0.98) |
33.6 (93) 1.15 (0.89) |
| Grade 11 spring | 36.9 (52) 1.56 (0.93) |
40.6 (26) 0.74 (0.76) |
36.5 (19) 0.68 (0.34) |
36.8 (50) 1.07 (0.86) |
38.8 (47) 1.27 (0.94) |
37.7 (97) 1.17 (0.90) |
| Grade 12 fall | 41.4 (60) 1.48 (1.06) |
34.3 (23) 1.12 (0.90) |
30.8 (16) 0.98 (0.64) |
36.1 (52) 1.19 (1.00) |
39.2 (47) 1.45 (0.95) |
37.5 (99) 1.31 (0.98) |
Note. For each time point, the top row displays the percentage and number of participants who reported any alcohol use (i.e., probability of alcohol use) and the bottom row displays the mean and standard deviation of alcohol use frequency among adolescents who reported any use. Raw scores of alcohol use frequency are presented, yet, to correct for positive skewness, log-transformed values were used to examine group differences (e.g., ethnic differences) in the frequency of alcohol use.