Table 5.
Random effect model coefficients for change in drinking between baseline and 3- and 12-month follow-up, by drinking prior to the eventa
| 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) | |
|---|---|---|---|---|---|---|
| Drinking before event (N = 98 at baseline) | ||||||
| Primary outcomes | ||||||
| Days of 5+/4+ men/women last 28-day | 0.92 (0.29) | 0.27 (0.17) | −0.53 (0.18)** | −0.29 (0.18) | −0.28 (0.25) | −0.78 (0.24)** |
| Any RAPS4 positive last 3 months | −0.54 (1.05) | 0.18 (0.59) | −1.56 (0.67)* | −2.72 (0.78)*** | 0.27 (0.86) | −0.03 (0.94) |
| Secondary outcomes | ||||||
| No. of drinking days per week last 28-day | 0.55 (0.17) | 0.18 (0.11)† | −0.26 (0.11)* | 0.00 (0.11) | −0.16 (0.15) | −0.48 (0.15)*** |
| Drinks per drinking day last 28-day | 1.56 (0.25) | 0.10 (0.16) | −0.54 (0.17)** | −0.63 (0.16)*** | −0.10 (0.23) | −0.44 (0.22)* |
| Maximum drinks last 28-day | 1.83 (0.29) | 0.15 (0.18) | −0.72 (0.19)*** | −0.72 (0.18)*** | −0.16 (0.25) | −0.59 (0.24)* |
| SIPs + 6 count last 3 months | 1.41 (0.30) | 0.19 (0.17) | −0.85 (0.17)*** | −0.82 (0.17)*** | −0.21 (0.23) | −0.40 (0.22)† |
| No drinking before event (N = 521 at baseline) | ||||||
| Primary outcomes | ||||||
| Days of 5+/4+ men/women last 28-day | 0.67 (0.11) | −0.04 (0.07) | −0.41 (0.06)*** | −0.26 (0.06)*** | −0.07 (0.09) | −0.16 (0.08)† |
| Any RAPS4 positive last 3 months | −1.18 (0.46) | 0.07 (0.26) | −0.89 (0.26) *** | −1.60 (0.29)*** | −0.44 (0.37) | −0.09 (0.40) |
| Secondary outcomes | ||||||
| No. of drinking days per week last 28-day | 0.39 (0.06) | −0.01 (0.04) | −0.18 (0.03) *** | −0.01 (0.03) | −0.07 (0.05) | −0.10 (0.05)* |
| Drinks per drinking day last 28-day | 1.34 (0.12) | −0.03 (0.07) | −0.55 (0.07) *** | −0.63 (0.07)*** | −0.17 (0.10)† | −0.13 (0.10) |
| Maximum drinks last 28-day | 1.53 (0.13) | −0.02 (0.08) | −0.63 (0.08) *** | −0.64 (0.08)*** | −0.22 (0.11)* | −0.16 (0.11) |
| SIPs + 6 count last 3 months | 0.95 (0.11) | −0.10 (0.07) | −0.54 (0.06) *** | −0.57 (0.06)*** | −0.08 (0.09) | −0.03 (0.08) |
aAll drinking outcome variable were log-transformed, except for any RAPS4 positive.
bSignificant tests not shown for intercepts.
†P < 0.10, *P < 0.05, **P < 0.01, ***P < 0.001.