Descriptive characteristics of studies selected for inclusion in the review
| Author | Year of publication | Country | Study design | Study period | Sample size | Relapse proportion (at 2 weeks) |
|---|---|---|---|---|---|---|
| Rowe33 | 2007 | Canada | Randomised controlled trial | – | 137 | 12.40% |
| McCarren24 | 1998 | USA | Prospective cohort | 1992–1995 | 284 | 10% |
| Emerman26 | 1999 | USA | Prospective cohort | 1996–1997 | 641 | 17% |
| Singh28 | 1999 | USA | Prospective cohort | 1996–1997 | 1228 | 15.80% |
| Rowe22 | 2008 | Canada | Prospective cohort | 2004–2005 | 695 | 13.90% |
| Rowe23 | 2015 | Canada | Prospective cohort | 2003–2007 | 807 | 14% |
| Lin29 | 2009 | Canada | Retrospective cohort | 2006–2007 | 257 | – |
| Prabhakaran30 | 2013 | Singapore | Retrospective cohort | 2008–2009 | 1303 | 7.4% (4 week) |
| Baibergenova31 | 2006 | Canada | Administrative database | 2003–2004 | 23 253 | – |
| Withy32 | 2008 | USA | Administrative database | 1999–2004 | 4318 | 4% |