Table 1.

Characteristics of the documents included

Topic	n (%)	References
Type of publication
Peer-reviewed article	27 (96)	[23–49]
Conference presentation	1 (4)	[50]
Design/type of study
Retrospective patient tracing program	1 (4)	[30]
Registry-based analysis/prospective reengagement	1 (4)	[32]
Qualitative	1 (4)	[37]
Randomized controlled trial	2 (7)	[38, 41]
Comparative/case-control/assessment study	7 (25)	[25, 28, 33, 40, 42, 43, 49]
Using or testing an existing or slightly modified intervention	16 (56)	[23, 24, 26, 27, 29, 31, 34–36, 39, 44–48, 50]
Country
Australia	1 (4)	[36]
Ireland	1 (4)	[42]
Trinidad and Tobago	1 (4)	[30]
Canada	1 (4)	[50]
United States of America	24 (86)	[23–29, 31–35, 37–41, 43–49]
Publication date
Before 2015	2 (7)	[32, 44]
2015 or later	26 (93)	[23–31, 33–43, 45–50]