Table 1.
Descriptive data for cannabis use, alcohol use and alcohol consequences at each time point
| Year 1 | ||||
|---|---|---|---|---|
| Sep | Dec | Feb | Apr | |
| n complete | 934 | 879 | 846 | 855 |
| n co-users | 173(18.5%) | 108(12.3%) | 121(14.3%) | 115(13.5%) |
| Cannabis usea | 0.45(1.11) | 0.39(1.09) | 0.42(1.13) | 0.41(1.15) |
| Alcohol useb | 6.42(9.70) | 5.13(8.70) | 6.02(9.80) | 5.72(9.39) |
| YAACQ | ||||
| TOT | 5.34(7.41) | 3.24(6.20) | 4.03(7.35) | 3.73(6.77) |
| SOC | 1.01(1.44) | 0.61(1.24) | 0.70(1.30) | 0.67(1.29) |
| CONT | 0.83(1.30) | 0.52(1.11) | 0.65(1.31) | 0.60(1.2) |
| SELF-P | 0.44(0.97) | 0.26(0.76) | 0.32(0.89) | 0.29(0.79) |
| SELF-C | 0.72(1.38) | 0.48(1.27) | 0.57(1.43) | 0.51(1.26) |
| RISK | 0.63(1.19) | 0.31(0.87) | 0.42(1.07) | 0.39(1.05) |
| ACOC | 0.26(0.74) | 0.18(0.68) | 0.28(0.88) | 0.24(0.76) |
| DEP | 0.21(0.54) | 0.17(0.48) | 0.19(0.54) | 0.20(0.55) |
| BLK | 1.24(1.81) | 0.71(1.45) | 0.88(1.62) | 0.83(1.57) |
| Year 2 | ||||
| Sep | Dec | Feb | Apr | |
| n complete | 889 | 867 | 857 | 843 |
| n co-users | 140(15.7%) | 122(14.1%) | 120(14.0%) | 123(14.6%) |
| Cannabis usea | 0.48(1.27) | 0.49(1.32) | 0.51(1.34) | 0.53(1.40) |
| Alcohol useb | 6.74(10.19) | 5.38(8.35) | 5.44(8.43) | 5.24(8.35) |
| YAACQ | ||||
| TOT | 4.14(7.12) | 3.41(6.73) | 3.42(6.69) | 3.23(6.31) |
| SOC | 0.78(1.35) | 0.63(1.24) | 0.60(1.24) | 0.58(1.19) |
| CONT | 0.66(1.25) | 0.57(1.20) | 0.55(1.13) | 0.51(1.08) |
| SELF-P | 0.32(0.85) | 0.24(0.75) | 0.26(0.76) | 0.24(0.75) |
| SELF-C | 0.57(1.33) | 0.46(1.23) | 0.44(1.19) | 0.45(1.20) |
| RISK | 0.48(1.14) | 0.38(1.01) | 0.39(1.04) | 0.36(0.99) |
| ACOC | 0.16(0.63) | 0.22(0.78) | 0.20(0.72) | 0.20(0.70) |
| DEP | 0.20(0.56) | 0.16(0.49) | 0.16(0.50) | 0.14(0.44) |
| BLK | 0.98(1.70) | 0.75(1.50) | 0.82(1.64) | 0.75(1.46) |
| Year 3 | ||||
| Sep | Dec | Feb | Apr | |
| n complete | 897 | 856 | 853 | 855 |
| n co-users | 149(16.6%) | 122(14.3%) | 124(14.5%) | 118(13.8%) |
| Cannabis usea | 0.57(1.42) | 0.50(1.35) | 0.52(1.33) | 0.56(1.43) |
| Alcohol useb | 6.22(9.17) | 5.60(9.37) | 5.95(8.91) | 6.24(8.91) |
| YAACQ | ||||
| TOT | 3.62(6.25) | 3.16(5.88) | 3.20(5.92) | 3.55(6.14) |
| SOC | 0.68(1.25) | 0.60(1.17) | 0.55(1.12) | 0.63(1.17) |
| CONT | 0.59(1.11) | 0.49(1.01) | 0.53(1.08) | 0.62(1.16) |
| SELF-P | 0.23(0.67) | 0.20(0.70) | 0.21(0.69) | 0.26(0.78) |
| SELF-C | 0.52(1.30) | 0.46(1.23) | 0.45(1.21) | 0.51(1.25) |
| RISK | 0.46(1.12) | 0.33(0.93) | 0.32(0.89) | 0.36(0.93) |
| ACOC | 0.14(0.54) | 0.16(0.63) | 0.13(0.53) | 0.20(0.68) |
| DEP | 0.15(0.43) | 0.15(0.46) | 0.18(0.49) | 0.16(0.47) |
| BLK | 0.85(1.51) | 0.77(1.44) | 0.83(1.53) | 0.81(1.46) |
Notes.Means shown with standard deviations in parentheses.
Cannabis use frequency (past 30 days) coded 0=Never in the past month, 1=About once in the past month, 2=2–3 times in the past month, 3=Once or twice a week, 4=Three to four times a week, 5=Nearly every day, 7=Every day.
Typical drinks per week in the past month from the Daily Drinking Questionnaire.
YAACQ=Young Adult Alcohol Consequences Questionnaire; TOT=total consequences; SOC=social/interpersonal consequences; CONT=impaired control consequences; SELF-P=self-perception consequences; SELF-C=self-care consequences; RISK=risk behaviors; ACOC=academic/occupational consequences; DEP=dependence consequences; BLK=blackout consequences.