Table 6.
Random effect model coefficients for change in drinking between baseline and 3- and 12-month follow-up, by dispositional variablesa
| Interceptb (assess at baseline) | Group effect at baseline (intervention vs assess) | Time effect (3-month vs baseline) | Time effect (12-month vs baseline) | Interaction (3-month × intervention) | Interaction (12-month × intervention) | |
|---|---|---|---|---|---|---|
| Higher risk takingc (N = 205 at baseline) | ||||||
| Primary outcomes | ||||||
| Days of 5+/4+ men/women last 28-day | 0.80 (0.20) | 0.13 (0.12) | −0.46 (0.11)*** | −0.33 (0.11)** | −0.23 (0.16) | −0.35 (0.16)* |
| Any RAPS4 positive last 3 months | −1.09 (0.64) | 0.44 (0.39) | −1.04 (0.37)** | −1.65 (0.41)*** | −0.36 (0.54) | −0.53 (0.58) |
| Secondary outcomes | ||||||
| No. of drinking days per week last 28-day | 0.43 (0.12) | 0.12 (0.07) | −0.18 (0.07)** | −0.03 (0.07) | −0.15 (0.10) | −0.22 (0.10)* |
| Drinks per drinking day last 28-day | 1.53 (0.19) | −0.06 (0.12) | −0.64 (0.11)*** | −0.80 (0.11)*** | −0.03 (0.16) | −0.05 (0.16) |
| Maximum drinks last 28-day | 1.79 (0.22) | −0.01 (0.14) | −0.76 (0.13)*** | −0.83 (0.13)*** | −0.12 (0.18) | −0.16 (0.18) |
| SIPs + 6 count last 3 months | 1.46 (0.20) | 0.09 (0.12) | −0.75 (0.10)*** | −0.88 (0.10)*** | −0.25 (0.15) | −0.22 (0.15) |
| Lower risk taking (N = 414 at baseline) | ||||||
| Primary outcomes | ||||||
| Days of 5+/4+ men/women last 28-day | 0.59 (0.12) | −0.01 (0.07) | −0.42 (0.07)*** | −0.23 (0.06)*** | −0.05 (0.09) | −0.24 (0.09)* |
| Any RAPS4 positive last 3 months | −1.34 (0.55) | 0.01 (0.29) | −0.97 (0.31)** | −1.82 (0.35)*** | −0.32 (0.44) | 0.14 (0.48) |
| Secondary outcomes | ||||||
| No. of drinking days per week last 28-day | 0.35 (0.07) | 0.00 (0.04) | −0.20 (0.04)*** | 0.00 (0.04) | −0.06 (0.05) | −0.15 (0.05)** |
| Drinks per drinking day last 28-day | 1.23 (0.13) | 0.03 (0.08) | −0.52 (0.08)*** | −0.55 (0.07)*** | −0.22 (0.11)* | −0.25 (0.11)* |
| Maximum drinks last 28-day | 1.38 (0.15) | 0.04 (0.09) | −0.60 (0.08)*** | −0.56 (0.08)*** | −0.25 (0.12)* | −0.28 (0.12)* |
| SIPs + 6 count last 3 months | 0.74 (0.12) | −0.06 (0.07) | −0.50 (0.07)*** | −0.46 (0.06)*** | −0.05 (0.09) | −0.06 (0.09) |
aAll drinking outcome variable were log-transformed, except for any RAPS4 positive.
bSignificant tests not shown for intercepts.
cIncludes impulsivity and sensation seeking.
*P < 0.05, **P < 0.01, ***P < 0.001.