| Study | Reason for exclusion |
|---|---|
| Alicea‐Alvarez 2014 | Excluded as study was not an RCT. |
| Anderson 2004 | Excluded as study was not an RCT. |
| Apter 2003 | Excluded as study was not an RCT. |
| Baren 2001 | Excluded as the intervention was not culture‐specific. |
| Bruzzese 2011 | Excluded as study was not an RCT. |
| Butz 2006 | Excluded as the intervention was not culture‐specific. |
| Choy 1999 | Excluded as study was not an RCT. |
| Clark 2004 | Excluded as the intervention was not culture‐specific. |
| Crowder 2012 | Excluded as study was not an RCT. |
| DePue 2007 | Non RCT and intervention was not culture‐specific. |
| Evans 1997 | Non RCT and participants were staff of the clinics rather than asthma patients. Intervention was not culture‐specific. |
| Evans 1999 | Excluded as intervention was not culture‐specific. |
| Fisher 2009 | Excluded as intervention was not culture‐specific. |
| Ford 1997 | Excluded as this re‐analysis was not an RCT. |
| Griffiths 2005 | Excluded as asthma management was nested within an RCT for chronic diseases. |
| Gundelman 2004 | Excluded as intervention was not culture‐specific. |
| Kay 2006 | Excluded as intervention was not culture‐specific. |
| Kelso 1995 | Excluded as study was not an RCT. |
| Mc Manus 2010 | Excluded as study was not an RCT. |
| Mitchell 1986 | Excluded as intervention was not culture‐specific. |
| Mosnaim 2013 | Excluded as intervention was not culture‐specific. |
| Nelson 2011 | Excluded as intervention was not culture‐specific. |
| Partridge 2000 | Excluded as study was not an RCT. |
| Perez 1999 | Excluded as intervention was not culture‐specific. |
| Persky 2007 | Excluded as study was not an RCT. |
| Pilcher 2014 | Excluded as intervention was not culture‐specific. |
| Poureslami 2011 | Excluded as study was not an RCT. |
| Press 2012 | Excluded as study was not an RCT. |
| Sperber 1995 | Excluded as study was not an RCT. |
| Sullivan 2002 | Excluded as study was not an RCT. |
| Tatis 2005 | Excluded as study was not an RCT. |
| Velsor‐Freidrich 2004 | Excluded as study was not an RCT. |
| Velsor‐Friedrich 2005 | Excluded as intervention was not culture‐specific. |
| Wise 2010 | Excluded as intervention was not culture‐specific and was not an RCT. |
| Zar 2012 | Excluded as study was not an RCT. |
| Zorc 2009 | Excluded as intervention was not culture‐specific. |
RCT: randomised controlled trial