Table 1 List of excluded studies and reasons for exclusion

English, 1992 [22]

Study did not assess an injection safety device

Guerlain 2010 [29]

Study was not conducted in a health care setting

Hirayama 2009 [23]

Study did not assess an injection safety device

Jeanes 1999 [24]

Study did not assess an injection safety device

Kuroyama 2006 [25]

Study did not assess an injection safety device

Lee 2005 [35]

Study did not report on any of the outcomes of interest

Musso 2010 [32]

Study reported attitudes of patients injecting themselves

Oyer 2011 [26]

Study did not assess an injection safety device

Pfutzner 2013 [27]

Study did not assess an injection safety device

Quiroga1998 [30]

Study was not conducted in a health care setting

Shelmet 2004 [33]

Study reported attitudes of patients injecting themselves

Sibbitt 2008 [28]

Study did not assess an injection safety device

Tsu 2009 [31]

Study was not conducted in a health care setting

Vidovic 2010 [34]

Study reported attitudes of patients injecting themselves