Table 1.
Baseline characteristics for study participants, with comparisons between those lost to follow-up and those who completed follow-up, as well as 10-week (post-treatment) follow-up, with comparisons between baseline and follow-up results
| At baseline | At follow-up | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| All participants | Lost to follow-up | Participated in follow-up | Statistical parameter | p | Statistical parameter | p | Cohen’s d | ||||||||
| (n = 3897) | (n = 2854) | (n = 1043) | |||||||||||||
| Age, years, M (SD) | 41.88 | (12.36) | 40.68 | (12.31) | 45.18 | (11.90) | t = | −10.177 | <0.001 | ||||||
| % Gender, male/female | 48/52 | 48/52 | 50/50 | χ2 = | 0.965 | 0.326 | |||||||||
| AUDIT (n = 3897) | (n = 1012) | ||||||||||||||
| AUDIT score | 21.39 | (6.08) | 21.82 | (6.12) | 20.24 | (5.81) | t = | 7.414 | <0.001 | 14.84 | (6.47) | t = | 29.831 | <0.001 | 0.98 |
| Alcohol use categories (% in non-problematic/hazardous/harmful/probable dependence) | 0/18/20/62 | 0/17/18/65 | 0/22/24/54 | χ2 = | 39.122 | <0.001 | 9/48/21/22 | χ2 = | 254.403 | <0.001 | |||||
| Drug use (% DUDIT >0) | 13 | 14 | 10 | 8 | |||||||||||
| TLFB (n = 3867) | (n = 968) | ||||||||||||||
| Drinks past week | 27.27 | (17.92) | 28.10 | (18.66) | 25.00 | (15.52) | t = | 4.777 | <0.001 | 12.96 | (13.79) | t = | 22.841 | <0.001 | 0.74 |
| No of drinking days/week | 4.36 | (2.02) | 4.35 | (2.03) | 4.37 | (1.99) | t = | −0.274 | 0.784 | 2.93 | (2.19) | t = | 22.805 | <0.001 | 0.66 |
| No of binge drinking days | 3.03 | (2.00) | 3.10 | (2.02) | 2.84 | (1.94) | t = | 3.571 | <0.001 | 1.37 | (1.71) | t = | 20.476 | <0.001 | 0.74 |
| Low-risk drinking (% ≤ 9/14 drinks/week for women/men) | 5 | 5 | 7 | χ2 = | 3.904 | 0.048 | 40 | χ2 = | 42.988 | <0.001 | |||||
| HADS (n = 3897) | (n = 896) | ||||||||||||||
| Anxiety | 6.53 | (4.02) | 6.74 | (4.08) | 5.97 | (3.77) | t = | 5.291 | <0.001 | 7.03 | (4.52) | t = | 17.801 | <0.001 | 0.70 |
| Clinical status (% ≥11) | 73.1 | 69.1 | 74.6 | χ2 = | 11.589 | 0.001 | 16 | χ2 = | 206.360 | ||||||
| Depression | 10.51 | (4.70) | 10.77 | (4.74) | 9.82 | (4.53) | t = | 5.673 | <0.001 | 3.86 | (3.50) | t = | 20.966 | <0.001 | 0.60 |
| Clinical status (% ≥11) | 22 | 17 | 24 | χ2 = | 21.582 | <0.001 | 4 | χ2 = | 164.689 | <0.001 | |||||
| WHOQOL-Bref (n = 3897) | (n = 891) | ||||||||||||||
| PHYS | 12.7 | (2.51) | 12.58 | (2.53) | 13.02 | (2.40) | t = | −4.810 | <0.001 | 14.40 | (2.58) | t = | −18.372 | <0.001 | −0.62 |
| PSYCH | 11.19 | (2.79) | 11.05 | (2.84) | 11.59 | (2.62) | t = | −5.345 | <0.001 | 13.18 | (2.77) | t = | −20.131 | <0.001 | −0.68 |
| SOCIAL | 11.93 | (3.11) | 11.83 | (3.17) | 12.20 | (2.91) | t = | −3.231 | 0.001 | 13.46 | (3.02) | t = | −12.809 | <0.001 | −0.43 |
| ENVIR | 14.67 | (2.49) | 14.49 | (2.53) | 15.18 | (2.29) | t = | −7.769 | <0.001 | 15.75 | (2.27) | t = | −8.904 | −0.30 | |
| EQ5D (n = 3897) | (n = 890) | ||||||||||||||
| EQ5D index | 0.70 | (0.20) | 0.70 | (0.20) | 0.73 | (0.17) | t = | −0.327 | 0.755 | 0.78 | (0.18) | t = | −16.636 | <0.001 | −0.34 |
| EQ5D Health today | 58.32 | (22.25) | 57.22 | (22.65) | 61.34 | (20.83) | t = | −5.132 | <0.001 | 73.07 | (18.66) | t = | −10.099 | <0.001 | −0.56 |
| RTCQ (n = 3897) | n = 883 | ||||||||||||||
| Action score | 0.46 | (4.04) | 0.28 | (4.05) | 0.96 | (3.97) | t = | −4.654 | <0.001 | 4.92 | (3.43) | t = | −26.150 | <0.001 | −0.88 |
| RTCQ categories(% in Pre-contemplation/Contemplation/Action) | 0/91/8 | 1/92/8 | 0/90/10 | χ2 = | 10.723 | 0.005 | 1/41/58 | χ2 = | 21.667 | <0.001 | |||||
| Readiness ruler | 8.37 | (1.89) | 8.34 | (1.94) | 8.46 | (1.75) | t = | −1.810 | 0.07 | 7.99 | (2.17) | t = | 6.521 | 0.001 | 0.22 |