Table 1 Summarized description of studies included in the systematic review
Author (year) | Sample | Follow-up | Methodology | MQSa |
|---|---|---|---|---|
N (%male); mean age | (% retention) | |||
Wagener et al.[18] | 152 (54.6%); 20.9 years | 10 months (94.7%) | randomization sequence: adequate | 11 |
allocation concealment: unclear | ||||
blinding: unclear | ||||
Fernandez et al.[19] | 1014 (43%); 18.4 years | 10 months (90.8%) | randomization sequence: adequate | 13 |
22 months (84%) | allocation concealment: unclear | |||
12 months for parents | blinding: blind (for interviewers) | |||
Mastroleo et al.[20] | 122 (52%); 18.1 years | 3 months (85.4%) | randomization sequence: adequate | 12 |
allocation concealment: unclear | ||||
blinding: unclear | ||||
Murphy et al.[21] | study 1: 74 (41%); 21.2 years | 1 month | randomization sequence: adequate | 11 |
study 2: 133 (50%); 18.6 years | (study 1: 93.2%) | allocation concealment: unclear | ||
(study 2: 88.7%) | blinding: blind (for interviewer) | |||
Turrisi et al.[22] | 1275 (44.4%); 17.9 years | 10 months (85.5%) 12 months for parents | randomization sequence: adequate | 14 |
allocation concealment: unclear | ||||
blinding: unclear | ||||
Schaus et al.[23] | 363 (48%); 20.6 years | 3 months (76%) | randomization sequence: adequate | 13 |
6 months (58%) | allocation concealment: adequate | |||
9 months (59%) | blinding: unclear | |||
12 months (65%) | ||||
Butler et al.[24] | 84 (34.3%); 20.2 years | 1 month (73.6%) | randomization sequence: unclear | 11 |
allocation concealment: unclear | ||||
blinding: unclear | ||||
Simão et al.[25] | 266 (56.4%); 19.6 years | 12 months (98.8%) | randomization sequence: unclear | 12 |
24 months (81.2%) | allocation concealment: unclear | |||
blinding: unclear | ||||
Wood et al.[26] | 335 (47.5%); 20.9 years | 1 month (82.4%) | randomization sequence: unclear | 12 |
3 months (75.5%) | ||||
6 months (72.5%) | allocation concealment: unclear | |||
blinding: unclear | ||||
Carey et al.[27] | 509 (35%); 19.2 years | 1 month (97%) | randomization sequence: unclear | 14 |
6 months (87%) | allocation concealment: unclear | |||
12 months (78%) | blinding: unclear | |||
Murphy et al.[28] | 54 (31%); 19.9 years | 6 months (94%) | randomization sequence: unclear | 12 |
allocation concealment: unclear | ||||
blinding: unclear | ||||
Larimer et al.[30] | 159 (not described);18.8 years | 12 months (75%) | randomization sequence: unclear | 13 |
allocation concealment: unclear | ||||
blinding: unclear | ||||
Baer et al.[31] | 659 (45%); ≤ 19 years | 12 months (not reported) | randomization sequence: unclear | 13 |
6 months (>72%) | allocation concealment: unclear | |||
12 months (>72%) | blinding: unclear | |||
24 months (93.5%) | ||||
Roberts et al.[32] | 390 (44.8%); not described | 24 months (84.2%) | randomization sequence: unclear | 14 |
allocation concealment: unclear | ||||
blinding: unclear | ||||
Borsari et al.[33] | 63 (43%); 18.6 years | 6 week (98%) | randomization sequence: adequate | 11 |
allocation concealment: unclear | ||||
blinding: unclear | ||||
Marlatt et al.[34] | 348 (45.9%); not described | 6 months (100%) | randomization sequence: adequate | 15 |
12 months (94%) | allocation concealment: unclear | |||
24 months (88%) | blinding: unclear | |||
Baer et al.[35] | 134 (48%); 21.2 years | 3 months (>72%) | randomization sequence: unclear | 11 |
6 months (>72%) | allocation concealment: unclear | |||
12 months (>72%) | ||||
24 months (93.5%) |