A summary of the contribution of participant identifications strategies to randomised controlled trial recruitment*†
| Mass mailing | Media coverage and advertising | Health service referrals | Community outreach | Other, unspecified, unknown | Participants enrolled | |
| Kusek, 200244 | 783 (27%) | 1570 (54%) | 280 (10%) | 119 (4%) | 179 (6%) | 2931 (100%) |
| Chlebowski, 201040 | 634 (100%) | – | – | – | – | 634 (100%) |
| Lee, 201145 | 174 (47%) | 129 (35%) | 30 (8%) | 8 (2%) | 28 (8%) | 369 (100%) |
| Heiney, 201042 | 25 (42%) | NR | 24 (41%) | NR | – | 59 (100%) |
| Bhar, 201338 | 6 (18%) | – | 27 (82%) | – | – | 33 (100%) |
*Contribution defined as the number of participants randomised as a result of each strategy (percentage of all participants randomised).
†Poor quality studies excluded.
NR, not reported separately. In total, media and community strategies accounted for 17% of enrolled participants in this study.