| Study | Reason for exclusion |
|---|---|
| Baer 1992 | No control group |
| Battjes 2004 | Not RCT |
| Carey 2013b | 2 arms of this trial were non‐randomised (choice condition) |
| Collins 2002 | Mailed intervention |
| Cowell 2012 | Not RCT |
| Dauer 2005 | Participants over 25 years |
| Gregory 2001 | Not MI |
| Hayes 2007 | No control group |
| Hustad 2014 | Although this study followed a randomised controlled design with 2 intervention groups, it did not have a non‐MI control or comparison |
| Kypri 2008 | Not MI |
| Kypri 2009 | Not MI |
| LaBrie 2002 | No control group |
| LaBrie 2011 | No control group |
| Longabaugh 2001 | Participants over 25 years |
| Magill 2009 | No relevant outcomes |
| Maisto 2001 | Participants over 25 years |
| Morgenstern 2007 | Participants over 25 years |
| Morgenstern 2012 | Participants over 25 years |
| Murphy 2012b | No non‐MI control |
| Nirenberg 2013b | Follow‐up data collection referred to baseline time frame (methodological study) |
| Ondersma 2007 | Participants over 25 years |
| Peterson 2006 | Alcohol outcomes not reported separately |
| Potts 2001 | Not RCT |
| Smith 2003 | Participants over 25 years |
| Spirito 2011 | No non‐MI comparison group |
| Wei Sun 2006 | Not MI |
| Woodhall 2007 | Participants over 25 years |
MI: motivational interviewing; RCT: randomised controlled trial.