Table 1.
Descriptive properties of analysis variables
| Variable | No. of items | Range | Mean (SD) or % |
| Had a drink of alcohol in past 6 months | |||
| Wave 1 | 1 | 0 = no/1 = yes | 54% |
| Wave 2 | 1 | 0 = no/1 = yes | 54% |
| Wave 3 | 1 | 0 = no/1 = yes | 58% |
| Wave 4 | 1 | 0 = no/1 = yes | 54% |
| Wave 5 | 1 | 0 = no/1 = yes | 55% |
| Wave 6 | 1 | 0 = no/1 = yes | 51% |
| Predictors (Wave 1) | |||
| Self-reported grades | 1 | 1 = mostly D's or lower/4 = mostly A's | 2.59 (0.77) |
| How feel about school | 1 | 1 = hate school/5 = like school very much | 4.03 (0.91) |
| Ever run away | 1 | 0 = no/1 = yes | 15% |
| Ever had sex | 1 | 0 = no/1 = yes | 43% |
| Acting-out behaviors, past 6 months | 5 | 1 = never/5 = 5 or more times | 1.70 (0.78) |
| Competencies | 7 | 1 = rarely or never/4 = almost always | 2.76 (0.68) |
| Self-esteem | 6 | 1 = disagree/5 = agree | 3.91 (0.80) |
| Sensation-seeking | 6 | 1 = disagree/5 = agree | 2.34 (1.00) |
| Pro-social peer values | 6 | 1 = disagree/5 = agree | 3.34 (0.67) |
| Positive alcohol outcome expectancies | 8 | 1 = disagree/5 = agree | 2.01 (0.97) |
| Mother had serious problem with alcohol in past | 1 | 0 = no/1 = yes | 20% |
| Mother has serious problem with alcohol now | 1 | 0 = no/1 =yes | 6% |
| Father had serious problem with alcohol in past | 1 | 0 = no/1 = yes | 16% |
| Father has serious problem with alcohol now | 1 | 0 = no/1 = yes | 47% |
| Frequency of smoking cigarettes | 1 | 0 = not at all/5 = >1 pack/day | 0.67 (0.89) |
| No. of drugs ever tried (among those who had drunk alcohol at least once at Wave 1) | 7 | count of 7 drug categories | 1.01 (1.32) |
| No. of days drank alcohol | 1 | 0 - 31 days | 2.80 (5.01) |
| Average no. of drinks | 1 | 0 - 21 or more drinks | 4.54 (6.18) |
| Most to drink in one day | 1 | 0 - 21 or more drinks | 4.83 (6.21) |
| Problems with alcohol, past month | 8 | 0 = rarely or never/1 = yes | 0.36 (0.42) |
| Outcomes (Wave 7) | |||
| Currently married/living with partner | 1 | 0 = no/1 = yes | 42% |
| Ever attended college | 1 | 0 = no/1 = yes | 49% |
| Working at least half-time | 1 | 0 = no/1 = yes | 48% |
| Not enough money for food, clothing housing | 1 | 1 = never/4 = always | 1.79 (0.92) |
| No. of legal convictions, lifetime | 7 | count of 7 convictions | 0.15 (0.45) |
| How often smoke cigarettes | 1 | 0 = not at all/4 = every day | 0.75 (1.10) |
| No. of drugs ever tried | 8 | count of 8 drug categories | 1.05 (1.47) |
| No. of days drank alcohol | 1 | 0-31 days | 2.36 (4.94) |
| Average no. of drinks | 1 | 0-99 | 4.79 (10.01) |
| Most to drink in one day | 1 | 0-99 | 4.36 (7.92) |
| Problems with alcohol, past month | 8 | 0 = rarely or never/1 = yes | 0.90 (0.72) |